Water Quality Updates

Please check the secchi disk page for standard weekly water quality updates.

October 11, 2018: The New York State Department of Health recommends that all consumers served by the Village of Rushville’s Public Water Supply, including customers in the Middlesex Water District

The New York State Department of Health recommends that all consumers served by the Village of Rushville’s Public Water Supply, including customers in the Middlesex Water District, use an alternate source of water for drinking, cooking, making infant formula, making ice, and preparing food and beverages until further notice. The water is acceptable for other household uses, such as bathing, washing hands, washing dishes, flushing toilets, and cleaning. Boiling water and in-home treatment will not remove the blue-green algae or their toxins.

Sampling collected on Tuesday October 9, 2018 returned results of 0.66 micrograms per liter of microcystin in finished water. This level is higher than the U.S. Environmental Protection Agency’s 10-day Health Advisory level of 0.3 micrograms per liter of microcystins for bottle fed infants and children under 6 years old. For individuals not included in that group, the EPA’s health advisory level is 1.6 microgams per liter. However, out of an abundance of caution, the state is recommending all consumers do not consume water at this time. Confirmatory samples are being collected and tested at the Wadsworth Center, the NYSDOH’s public health laboratory.

The Village of Rushville’s Public Water Supply is working with the NYS Department of Health and Ontario and Yates counties to provide bottled water for residents while the advisory remains in effect. We will notify consumers immediately when the Health Advisory is discontinued and the water is suitable for all household uses.

Please read the press release for full details.

Water Quality Update September 29, 2018

Volunteer Shoreline Monitoring Week 9 – Three samples were collected this week by shoreline volunteers – two of which came back above DEC bloom levels of 25 ug/L. Watershed staff received one additional call this week about suspicious bloom activity, but the report ending up being duckweed / watermeal. There may be isolated areas around the lake still experiencing blooms – we encourage you to continue to look for signs of active blooms before recreating in the lake or letting pets swim.

More info, including locations and results of the blooms sampled this week can be found on CLWA’s interactive HABS map.

Thanks go out to our shoreline monitors who have continued to provide valuable info during these last 9 weeks of the sampling season… one more week to go!

Water Quality Update for September 14, 2018

We are continuing to get many calls and emails about blue green algae blooms from all around the lake. Over the last few days, we have received photos of both open water and shoreline blooms that are very significant and concerning. Blooms have been identified all the way from the north end, down both sides of the lake and at the very south end near Hi-Tor. We are seeing in more consistently in the open water areas as well.

Based on many of these photos coming from the southern half of the lake where there is no public water supply- we would highly suggest that if you have a PRIVATE water system and you draw water directly from the lake that you should consider using bottled water. Here is a link to a fact sheet from the Health Department that would be helpful in your decision making: https://www.health.ny.gov/publications/6629.pdf

Please continue to use caution and look for blue green algae before entering the lake to swim. The weather is going to be great the next few days for both swimming and possible blooms. Please look before you swim. It is really important to do that for your pets as well.

RESOURCES:
Please visit the Health Department Website for more information. An excerpt from their webpage:

If you are not on a public water supply and are using surface water:

Bloom or no bloom, never drink, prepare food, or make ice with untreated surface water. You may also consider not using it for washing, especially if it looks cloudy.
During a bloom, don’t drink, prepare food, or make ice with surface water, even if you treat the water yourself.
Boiling water will not remove blue-green algae or their toxins. Learn more.

If you are on public water:

Your water is treated, disinfected and monitored for drinking and household use. Learn more.

Water Quality Update for September 13, 2018

We’ve received many calls and emails notifying us of blue green algae blooms along stretches of shoreline all around the lake. Condition reports range from mild to heavy surface streaking, “dots in the water”, to areas of thicker “pea soup” concentrations of algae. Watershed staff and shoreline volunteers did extensive field visits yesterday and observed heavy concentrations of blue green algae at most areas surveyed around the lake. We have posted some of those pictures on the interactive map on the Watershed Association website.

We received results from the DEC on fourteen samples that were collected over the last week, and all but two samples came back over the bloom criteria of 25 ug/L of Blue-Green Chlorophyll a. This is reinforcing that we need to continue to use extreme caution when coming in contact with the water. Blooms can come and go quickly, and some areas that are clear in the morning may experience blooms later in the day. Please use your visual indicators and always look for signs of a bloom before entering the lake or letting your pets swim.

While we are learning more about the blue green algae dynamics in the lake through active monitoring and reporting, there are still many things we do not fully understand about blooms. Several other nearby Finger Lakes are also experiencing blooms (Seneca, Owasco, Keuka, Skaneateles, Conesus) and many have the same questions on why blooms are occurring in more frequency and with more intensity over the last several years. We will continue to work diligently with our state agencies to collect local data that will contribute to the ongoing HAB (harmful algal bloom) research being done across the state.

We thank you for your phone calls and emails alerting us of conditions you are seeing. While it is not possible for us to sample every bloom we see, the visual reports are critical in helping us assess the magnitude of the bloom and overall lake-wide conditions.

Water Quality Update for September 6, 2018

Conditions on the lake the last couple days have dramatically changed from what we saw on Tuesday morning. By Tuesday mid-morning we had over 50 reports of Harmful Algae Blooms (HABs) all along the western side of the lake for almost 10 miles or as far south as the Bristol Harbor area. We did extensive field visits with both volunteers and Watershed staff. We also spent over 3 hours patrolling the open water of the lake to try and better understand the extent of blooms on the lake. There were patches of HABs in the open water area on the western side of the lake for about the first 6 miles. The eastern shoreline also had significant blooms- but were more sporadic. We have posted some of those pictures on the interactive map on the Watershed Association website. The initial concentrations of the samples that were collected are showing levels far in exceedance of the 25ug/L bloom threshold. In some cases levels are in the several thousand ug/L concentration!

Wednesday and Thursday have been very different days in terms of blooms. We received no reports on Wednesday and field visits did not show any blooms. Even though the temperatures were above 90 there was enough chop in the water to dissipate any concentrations. Today’s (Thursday) cloudy conditions and occasional rain has reduced concentrations, however we did collect a couple samples along the western shoreline where there was light streaking and one isolated bloom area. The eastern shoreline and northern shoreline overall looked good during the morning to late morning hours.

Overall, conditions have substantially improved from what we saw on Tuesday. However, please continue to use caution before going in the water and use your visual indicators on whether there are HABs in the area. The spilled paint look that we saw on Tuesday is easy to identify. You need to look for the more subtle streaks in the water or lots of dots or speckles in the water column. We know the HABs are producing the microcystin toxin so it is important to stay away from areas where the HABs are visible.

We’d like to thank our Shoreline HABs Volunteers for their incredible work this week to help us collect and document blooms around the lake! Having the extra eyes out there actively looking for blooms helps us assess lakewide conditions.

Water Quality Update for September 4, 2018

We are seeing the “perfect storm” of conditions today for blue green algae. We have received many reports from shoreline property owners that they are seeing “pea soup” like conditions and streaking of algae. Today’s hot, calm weather is bringing the algae to the surface and it is likely that we will continue to see these conditions throughout the day.

It is very important to remember to use your visual indicators while using the lake. Please stay out of the water in areas where there are bloom like conditions. It is impossible to tell whether or not a bloom is toxic by looking at it, so please avoid these areas. Please remember that pets are especially vulnerable to Blue Green Algae since they drink a lot of water when in the lake and the algae can concentrate on their fur and they can ingest large quantities when they groom themselves.

Volunteers have been out all morning collecting samples and we will share the results as they become available.

Water Quality Update for August 31, 2018

We received toxin analysis from the State DEC on a sample that was collected on August 19th showing a level of 20ug/L of the toxin microcystin, which just meets the DEC Confirmed with High Toxins Bloom threshold of 20ug/L for a shoreline sample. The size of the bloom was small and localized. This result increases the need to use visual indicators to avoid the bloom areas.

Watershed staff went out today (Friday) with FLCC instructor Patty Thompson to do our monthly lake sampling program. We started at the south end launch and sampled 14 different near shoreline locations and two mid lake areas for a variety of chemical and physical parameters. Clarity in the mid lake area near Bristol Harbour was 8 meters- which is great for this time of year. However, with the calm winds we did see some light streaking of algae in the water column and dots in the water. We collected a sample in the area where the algae was streaking and had it screened at FLI. The results showed elevated concentrations but below bloom levels. This was the highest density location that we saw on the lake today.

We then proceeded north and patrolled both the near shore and mid lake areas. Our North Basin clarity reading is located mid lake near Deep Run Beach/old Thendara. The clarity reading here was 5 meters- which is more typical for this time of year. By comparison- during the 2015 bloom we were getting clarity readings of only 2.5 meters. We saw dots in the water at this location- but no streaking. Many of the near shore areas looked fairly clear in the northern half of the lake- but we would occasionally see areas that had more dots in the water. We also received reports of light streaking that would dissipate after a period of time.

The take home message from all of this information is that overall the vast majority of the lake is still well below bloom concentrations, but (and this is important)- there will be isolated pockets of algae that will concentrate in both the shoreline and mid lake areas- especially if there is calm or slight breeze levels. We typically see the concentrations increase on the windward side of the lake- however this is not always the case. Please use your visual indicators of lots of dots or streaking to make decisions on where to recreate this labor day weekend. As we have learned over the last three years- conditions can change rapidly on the lake. The weather looks like it will be sunny and warm which will potentially increase the ability for Blue Green Algae to increase in density.

Water Quality Update for August 30, 2018

We have received confirmation that all of the beaches on Canandaigua Lake were reopened today (8/30). The State Health Department gave the OK to open Deep Run beach and Onanda Park Beach after their closure last Friday (8/24) due to concerns of possible Blue Green algae in the water. The DOH had to wait for the test results to come back before opening the beach. Those results came back late yesterday. Kershaw Beach has remained open all week.

Our network of volunteers and watershed staff have been conducting visual assessments of open water and shoreline areas around the lake on a daily basis. The breezy conditions that we have experienced this week have kept us from seeing any significant concentrations of Blue Green Algae. We have seen some “dots in the water” in the deeper water areas which we have sampled on two different occasions this week, and the results came back way under bloom levels. Watershed staff were out today and clarity is holding at around 4.75 meters. We will also be out with FLCC tomorrow doing a full lake sampling effort that will look at multiple components of lake quality.

We did experience one very isolated bloom on the western side of Kershaw Park on Monday afternoon that was contained to a 3-4 foot area along the shoreline. All other areas of the shoreline were free and clear of algal concentrations. The algae was getting concentrated in an area of dead aquatic weeds that were against the shoreline. A sample was collected and sent to the State lab for analysis and the DEC confirmed the presence of cyanobacteria based on blue-green chlorophyll a levels of 181.24 µg/L (above the DEC Confirmed Bloom threshold of 25 µg/L). The site has been revisited each day since the bloom occurred and it has been clear. No other volunteers have reported blooms this week.

Going into the holiday weekend, we ask that you continue to use your visual indicators to look for signs of blue green algae before recreating in the lake. If you see it, avoid it! Overall, the vast majority of the lake is seeing concentrations of Blue Green Algae that are well below bloom criteria. However, it is the isolated bloom where people are utilizing the lake that will create the potential for concern. As we have learned over the last three years- conditions can change rapidly on the lake. If conditions are just right (calm, sunny weather) there may be potential for algal concentrations to accumulate along shorelines and in coves.

Water Quality Update for August 28, 2018

The hot and sunny weather over the last few days have increased the potential for BGA blooms, however the vast majority of the lake is free of any significant concentrations of blue green algae.

In an abundance of caution, the State Department of Health closed Deep Run and Onanda Beaches on Friday, August 24th. The County and Town are eagerly awaiting test results to hopefully show they can re-open those beaches. Local inspections of those beaches have shown clear conditions over the weekend and Monday- however it is only the state Department of Health that can re-open the beach. Kershaw Beach is still open.

The combination of our volunteer monitors, watershed staff and interested residents are indicating that the vast majority of the shoreline areas are free of any Blue Green Algae concentrations along both sides of the lake. We did see one very isolated spot about 4 feet wide along the northern shoreline, but the rest of the north end was free of any visible algae. We spent a couple hours on the lake yesterday and the very calm conditions did increase the “dots in the water” throughout the northern half of the lake with some reduction in clarity, but test results indicated that levels were well below bloom concentrations. The very windy conditions today mixed the algae further into the water column further reducing any concentrations at the surface or near the shoreline. Tomorrow is supposed to be very hot, but also very windy which should create similar conditions to today.

Overall, the vast majority of the lake is seeing concentrations of Blue Green Algae that are well below bloom concentrations. However, it is the isolated bloom where people are utilizing the lake that will create the potential for concern. As we have learned over the last three years- conditions can change rapidly on the lake. If conditions are just right after tomorrow (calm, sunny weather) there may be potential for algal concentrations to accumulate along shorelines and in coves. As always, we ask that you use your visual indicators to look for signs of blue green algae before recreating in the lake. If you see it, avoid it.

We will continue to work with our growing network of volunteers and the general public to monitor the shoreline and open water areas and will report any substantial changes.

Water Quality Update for August 24, 2018

We just received confirmation about a couple isolated shoreline blooms that were just above the DEC threshold. Overall, water clarity has been good in the lake. However, we are starting to get some more reports today along the east side that they are seeing concentrations of algae. There is a gentle breeze that can skim and concentrate the algae on the windward side.

The sunny, hot weather that is forecasted for the next week or so- could likely increase concentrations. Watershed staff and the growing volunteer network will be out looking at conditions and collecting samples where appropriate. If you seeconcentrations of algae- streaks of algae or lots of dots in the water- please avoid those areas. Pictures of blooms and locations can be sent to: habs@canandaigualakeassoc.org.

Here is the report from the DEC:

Below are the results from samples collected by trained volunteers on Canandaigua Lake. The sampling confirmed the presence of cyanobacteria HABs in the locations listed below. The bloom status is compared to the DEC Confirmed Bloom threshold of 25 µg/L Bluegreen Chlorophyll. For more detailed information and a map of zone locations on Canandaigua Lake go to: https://www.canandaigualakeassoc.org/science-education/blue-green-algae-2/

Toxin data will be forwarded upon receipt if they indicate an elevated risk. Exposure to any cyanobacteria HABs can cause health effects in people and animals when water with blooms is touched, swallowed, or when airborne droplets are inhaled. This is true regardless of toxin levels; some blue-green algae produce toxins, while others do not. Exposure to blooms and toxins can cause symptoms such as diarrhea, nausea or vomiting; skin, eye or throat irritation and allergic reactions or breathing difficulties. People and pets should avoid contact with blooms, and should rinse off with clean water if contact occurs. For more information go to www.health.ny.gov/harmfulalgae.

Date	Location	Status	BG Chl a (µg/l)	Visual Analysis
16-Aug	Zone 05	Confirmed	26	Microcystis
19-Aug	Zone 16	Confirmed	35	Microcystis

For more information on blue green algae, please see our Harmful Algae Bloom brochure here, or visit the New York State Department of Health website and the New York State Department of Environmental Conservation website.

August 20, 2018

We wanted to update the public on what we are collectively seeing on the lake through the combination of our volunteer monitors and watershed staff. Overall, Lake clarity is about 5-6 meters this past weekend- which is good for this time of year. However we are starting to see light streaking of Blue Green Algae (BGA) in a few isolated locations on both sides of the lake and we are also seeing visible dots in the water- which typically is from BGA. We have collected two samples and have brought them to Finger Lakes Institute where Dr. Lisa Cleckner confirmed utilizing a microscope that the dominant algae is Microcystis, a BGA we typically see in the lake. We don’t expect these samples to be above DEC bloom concentrations, however they will be analyzed at FLI and if necessary the state DEC lab in Syracuse and we will know the results soon.

Many of our monitors were out in the field today and no other concentrations of algae were reported. As we have learned over the last three years- conditions can change rapidly on the lake. If conditions are just right over the next few days (warm, calm, sunny weather) there may be potential for algal concentrations to accumulate along shorelines and in coves. As always, we ask that you use your visual indicators to look for signs of blue green algae before recreating in the lake. If you see it, avoid it!

Report suspicious blooms by emailing HABs@canandaigualakeassoc.org. This email “hotline” is monitored by CLWA and the Watershed Program Manager Kevin Olvany. Both organizations are actively partnering to assess lake conditions and bring you the most current information available.

January 24, 2018

CLWA sent letters to our state and regional representatives, calling on the Governor’s budget to expand the list of 12 priority lakes in the “Protecting New York’s Lakes from Harmful Algal Blooms” proposal of the 2018 State of the State to include Canandaigua, Keuka, and Seneca Lakes. Read the letters here.

October 9, 2017

On October 6th, the DEC Harmful Algal Bloom page added 9 waterbodies to the notification list. There are currently 68 waterbodies with blooms on the list.

Finger Lakes Sampling

DEC recently collected samples from all eleven Finger Lakes in order to learn more about the unique nature of harmful algal blooms in the Finger Lakes. While excessive nutrients (phosphorus and nitrogen) are recognized as a contributor to blooms, HABs have recently occurred in several Finger Lakes that have low nutrient levels. DEC’s Finger Lakes Hub staff and HABs monitoring partners worked together to collect large volumes of water from each lake, which were split and sent to multiple labs for analysis.

The Canandaigua Lake Watershed Council and CLWA collected and submitted two samples from Canandaigua Lake on September 26th for this study. Results will be published when they are received from the DEC.

Results from September 25th Sampling:

Below are the results from samples that confirmed the presence of cyanobacteria HABs in the locations listed below. The bloom status is compared to the DEC Confirmed Bloom threshold of 25 µg/L Bluegreen Chlorophyll and a Confirmed with High Toxin Bloom threshold of 20 µg/L microcystin.

Location	Date	HABs Status	BG Chl a (µg/L)	Microcystin (µg/L)	Visual Analysis
East Lake Road	9/25/2017	Confirmed with High Toxins	381	30	Mod. Microcystis, Trace DolichospermumDense Mougeotia, Mod. Zygnema, Fragilaria
East Lake Road	9/25/2017	Confirmed with High Toxins	45	22	Mod. Microcystis, Trace Dolichospermum

September 25, 2017

With today’s high temperatures, we are seeing a heavier accumulation of algae throughout the watershed. Thank you to all that are sending in images, as it helps us assess the current conditions around the lake.

Water samples are being collected today for another round of analysis at SUNY ESF. Results will be posted as soon as they are made available.

We urge you to use extreme caution when recreating in the lake. Please avoid all areas that show signs of streaking or have a spilled paint or pea soup appearance. Use these visual indicators before entering the water or letting your pets swim. If you see anything suspicious, avoid it!

Please continue to email us photos for our image library, noting the location that you took the photo (closest address or GPS coordinates are great). Photos can be emailed to info@canandaigualakeassoc.org

September 23, 2017

This warm, sunny and calm weather continues to provide potential excellent growing conditions for algae. Based on this mornings rising temperatures and slight northern breeze, we are starting to see an increase in algal activity towards the southern end of the lake.

As conditions can change quickly on the lake, so we cannot say where blue green algae will be present and whether it will reach bloom conditions. We urge you to continue to use caution when recreating in the lake. Please use your visual indicators before entering the water or letting your pets swim. If you see anything suspicious, avoid it!

Friday Afternoon – September 22, 2017 Update

We went out this afternoon from 1-4pm and toured the northern 6+ miles of the lake along both shorelines and mid lake areas. There is northerly breeze of about 5mph that is improving conditions both mid lake and along the shoreline. There were no visible signs of any surface streaking, concentrations or bloom conditions. Lake clarity is holding at about 7.5 to 8 meters in multiple locations. We also talked with one of our experienced volunteers who was out in the Vine Valley section of the lake and all looked good there as well. We did see some minor dots in the water in a few locations and utilized FLCC’s Blue Green Algae probe and the readings were consistently at low levels. Based on all of our sampling to date the levels we encountered would be well below bloom conditions and would be considered low risk.

However, conditions can change quickly on the lake, so use your visual indicators before entering the water and have a happy and safe weekend.

September 22, 2017

We have received the toxin results from the 3 samples collected on Monday. These samples were collected along the shoreline where the Blue Green Algae (BGA) was accumulating in isolated locations and are representative of the very worst case scenario areas that had the densest blue green algae. The blue green algae chlorophyll-a in these areas were 129.5 ug/L, 364.3 and 701.3 ug/L. The toxicity results were 117.84ug/L, 386.61ug/L and 663ug/L. Toxin levels that are above 20ug/L are considered to be in the high toxicity category. Obviously, our results are well above the 20ug/L threshold. Therefore, individuals need to use increased caution. Exposure to high levels of blue-green algae and their toxins can cause diarrhea, nausea or vomiting; skin, eye or throat irritation; and allergic reactions or breathing difficulties.

The very calm wind conditions this week (including today and most likely this weekend) are allowing BGA to concentrate along sections of the shoreline. As we noted yesterday BGA concentrations were starting to appear along sections of the west side as well…which was caused by a very gentle breeze coming out of the east. The slight breeze skims the water and concentrates the surface algae to the windward shore. There was no real wave action and thus no mixing to reduce algae concentrations.

It is important to note that our samples from mid-week show that the open water areas has great clarity- 7.5 meters, and has been mainly clear of any visible concentrations of algae. Our open water chlorophyll-a sample results and clarity readings indicate that the vast majority of the lake is not experiencing bloom level conditions. Instead, blooms tend to be located along sections of shoreline and near shore areas where the gentle wind is causing the algae to concentrate. This warm, sunny and calm weather continues to provide potential excellent growing conditions for algae. Conditions can change quickly on the lake, so we cannot say where blue green algae will be present and whether it will reach bloom conditions in a specific location. During very calm conditions blooms can potentially generate at the surface in the mid-lake areas as well.

Before going into the water, look for signs of blue green algae. If you see anything suspicious such as discolored water, dots in the water streaks of algae or outright bloom conditions- avoid it! In addition, remember that your pets can be especially vulnerable to Blue Green Algae since they drink a lot of water when in the lake and the algae can concentrate on their fur and they can ingest large quantities when they groom themselves.

If residents are seeing concentrations please email us pictures at Kevin.Olvany@canandaiguanewyork.gov or Kmcgarry@canandaiguanewyork.gov.

Evening of September 21, 2017 – Update

Today, we observed and had reports of blue green algae along multiple sections of the west side of the lake. This is the first time we observed surface streaking and concentrations along multiple areas of the western shoreline. We also observed some surface streaking along the eastern shoreline in cove areas. The very calm and very sunny conditions today brought the algae to the surface and has allowed it to concentrate in these shoreline areas. In other areas, dots were visible in the water column but were not surface streaking or concentrations.

Please continue to use visual indicators for blue green algae before going into the water. Blue green algae can concentrate in open water and shoreline areas, and conditions can change quickly on the lake. If you see anything suspicious, avoid it!

September 21, 2017

We conducted visual surveys of the shoreline yesterday. The wind was a gentle breeze out of the northwest so we visited multiple sites along the east side of the lake. The water was clear and showed no signs of blooms or surface streaking. Some dots of Blue Green Algae could be seen in the water column in one area but not at significant concentrations. Overall conditions looked very good in the areas that we have been seen isolated concentrations of Blue Green Algae. There seemed to be enough wind to break up any concentrations on the east side. If anyone is seeing anything different please let us know.

On Tuesday, Dr. Bruce Gilman and Watershed Technician Kim McGarry were on the lake for 3+ hours and completed field analysis and visual assessments in open water and shoreline areas. Some areas of the lake had a small amount of surface streaking and dots of algae were visible in the water column. However, we did not observe any dense concentrations like the samples taken on Monday. Our secchi disk reading in the open water was 7.4 meters (a 1.4 meter increase from Friday) which indicates that the overall water clarity is very good for this time of year and we do not have a significant density of Blue Green Algae throughout the water column. Dr. Gilman collected 2 shoreline and 2 mid-lake samples to get a sense of the overall levels of algae in the lake. Each of the samples had very low total chlorophyll-a. The range was 0.9 to 5.18ug/L. We could also easily see the bottom in the shoreline areas.

We have also received the results from the 3 samples collected on Monday. These samples were collected along the shoreline where the BGA was accumulating in isolated locations and are representative of the very worst case scenario areas that had the densest blue green algae. The blue green algae chlorophyll a in these areas ranged from 129.5 ug/L to 701.3 ug/L. These samples were well above the DEC threshold of 25ug/L for a bloom. We do not have any results from the toxin testing yet, but will provide them as they become available. However, it is important to note that the vast majority of the lake was not experiencing these types of conditions Instead, these types of blooms were isolated and were located along small sections of shoreline where the wind caused the algae to concentrate. We have not observed any concentrations to this level on Tuesday or Wednesday. If residents are seeing concentrations please email us pictures at Kevin.Olvany@canandaiguanewyork.gov or Kmcgarry@canandaiguanewyork.gov.

This warm, sunny and calm weather continues to provide potential excellent growing conditions for algae. Conditions can change quickly on the lake, so we cannot say where blue green algae will be present and whether it will reach bloom conditions. Before going into the water, look for signs of blue green algae. If you see anything suspicious, avoid it!

September 18, 2017

With this warm and sunny weather, we are continuing to see an increase in blue green algae in sections of the lake. However, our lake is not alone. This warm weather has also trigger blue green algae in many of the other Finger Lakes.

Based on the wind patterns, we observed higher concentrations of blue green algae along parts of the eastern shoreline this afternoon. We collected three samples and are having them analyzed at SUNY-ESF. At the same time, other sections of the lake were clear. We will continue to monitor the lake and will provide the results from SUNY-ESF as they become available.

Conditions on the lake can change quickly. Blue green algae concentrations may increase throughout the day with warmer temperatures and sunlight. They also shift with the wind. We cannot say at any given moment where algae will concentrate or where it will be clear . Before going into the lake, be sure to look for signs of blue green algae. If you see it, avoid it!

To report suspicious blooms contact:

Kevin Olvany
Canandaigua Lake Watershed Council Program Manager
klo@canandaiguanewyork.gov
(585) 396-3630

Kim McGarry
Watershed Technician
KMcGarry@canandaiguanewyork.gov
(585) 396-3630

September 14, 2017

Yesterday we had a few reports of small, isolated areas of surface streaking/concentrations of blue green algae along the east side of the lake. The warm, calm, sunny weather Tuesday and Wednesday was likely contributing to the increase in algae at the lake surface. We checked a few spots on Thursday morning, but did not find any concentrations. Overall lake clarity is lower than average due to higher algae concentrations. The forecast for the next 10 days shows more sunny and warm weather to come. Please keep an eye out for blue green algae concentrations over the next few weeks. Observations can be reported to the Canandaigua Lake Watershed Council at the addresses below.

Remember, if you see potential blue green algae blooms, avoid it!

To report suspicious blooms contact:

Kevin Olvany
Canandaigua Lake Watershed Council Program Manager
klo@canandaiguanewyork.gov
(585) 396-3630

Kim McGarry
Watershed Technician
KMcGarry@canandaiguanewyork.gov
(585) 396-3630

June 28th, 2017

CLWA attended the June 27th City of Canandaigua Finance Committee meeting and presented our position on the Canandaigua Finger Lakes Resort request for docking. Read it here.

June 26th, 2017

Water Quality Update:

Clarity readings continued to drop this week following a series of storm events that blew through the watershed.

Several of our members have observed groups of dead perch over the last few days accumulating towards the north shore of the lake. CLWA approached DEC Aquatic Biologist Pete Austerman for a possible explanation, as many have suspected that the perch may have died after the natural stress of spawning. Pete was aware of the issue and offered the following response:

“I don’t think this would be related to spawning stress for yellow perch because they are usually done spawning by May. Water temperature increases may have been a factor in this case. The surface temp in Canandaigua has gone up about 12 degrees during June and there is a wide variety in temperatures from one location to another. It is possible that shifting wind directions created a situation where the water temp in one location of the lake changed rapidly, causing thermal stress to the fish, which then leads to some type of infection. It is hard to say for sure what is going on but I’m confident that it is a natural occurrence because there is only one species involved. If there was a serious pollutant involved we would see a wide variety of species.”

April 11, 2017

Concerned that funding to support water quality protection initiatives may be at risk, CLWA sent letters to US Representatives Tom Reed and US Representative Chris Collins, whose districts encompass Canandaigua Lake. The letter calls on our representatives to consider that water quality is a priority for the Finger Lakes region, and deserves priority funding.

Read the letters here:
Representative Reed
Representative Collins

March 29, 2017

The Spring 2017 Household Hazardous Waste Collection Day will be held on Saturday, April 22, 2017 from 7:00 am to 3:00 pm. This is open to Ontario County residents only and pre-registration is required. The event is sponsored by Ontario County and Casella Waste Services.

Please click here for complete details, including a list of what materials will and will not be accepted.

January 27, 2017

CLWA submitted the following comments to the South Bristol Town Board regarding the Everwilde SEIS: CLWA_comments_everwildeSEIS

October 3, 2016

After reviewing the Habitat Management Plan for the 6,832 acre Hi Tor Wildlife Management Area for 2016-2025 and attending the Public Information session in Naples on September 8, 2016, CLWA issued the following comments to the DEC: CLWA_Hi Tor comments

September 21, 2016

Watershed Manager Update:

A couple of weeks ago, we observed some very small and isolated concentrations of blue green algae along the shoreline of the lake. We sent samples to SUNY ESF on September 7th, one from the most concentrated blue green algae we saw and a second sample from the open water. We just received the toxin analysis results, and the good news is that no toxin was found in either sample. Although this is a good sign, it doesn’t guarantee that the blue green algae won’t start producing toxins in the future. In addition, you should still avoid contact if you see a bloom, because blue green algae can still have health impacts even if it is not producing the toxin.

We have continued to monitor the shoreline over the past couple of weeks, and the blue green algae seems to be even more isolated now than before. The Watershed Association has volunteers that regularly monitor water clarity, and they have continued to observe excellent water clarity that was above 6 meters this week.

Please contact us if you see anything suspicious on the lake or if you have any questions or observations. The lake surface is 10,500 acres and has 36 miles of shoreline so the more eyes the better!

September 10, 2016

From the Watershed Program Manager:

Although the vast majority of the lake continues to not show any visual accumulation of algae and has excellent water clarity; yesterday’s relatively calm winds have once again allowed isolated pockets of algae to accumulate along small sections of shoreline on both sides of the lake. The Kershaw Park area of the lake continues to be clear any of visible algae.

We received the results from Wednesday’s sample collection and they mirror these visual assessments. There were two samples collected and transported to SUNY-ESF. The first was an isolated shoreline sample in the most concentrated area of blue green algae that we could find (see picture). This site (not surprisingly) had a concentration of 100ug/L of blue green algae chlorophyll-a. The blue green algae was identified as microcystis- the same as last year. The DEC bloom threshold is 25ug/L so this was obviously well above the bloom threshold. The second sample was an open water sample where we did see “dots” in the water indicating some algae at the surface. The results from this sample showed an undetectable amount of Blue Green Algae in the water. The toxin results for both samples will come back in 48 hours.

The accumulation of algae occurs typically in a cove or area where the natural water flow is being blocked by an object sticking out from shore. We are seeing these isolated concentrations on both sides of the lake, but the north end was very clear. From a visual analysis- over 95% of the shoreline that we saw was beautiful and free of any concentration of algae. With the warm sunny weather, conditions can change quickly on the lake and can vary throughout the lake. The overall high clarity of the water and that we are only seeing small isolated pockets of algae continues to give me great confidence that we will not experience anything like we did last year.

Our biggest take home message is to stay out of the areas where the algae is accumulating. Based on our test results, the areas where the algae is accumulating will be above the DEC bloom criteria and will be well below the bloom criteria in areas that do not have algae accumulating. Please continue to use the visual indicators to look for blooms using our guide or visit the NYS DEC website. We will update our websites and send when we get the toxin results back from SUNY-ESF or if we get any new information on changes to the quality of the lake.

Please contact us if you see anything suspicious on the lake or if you have any questions or observations. The lake surface is 10,500 acres and has 36 miles of shoreline so the more eyes the better!

September 7, 2016 Water Quality Update

We are starting to see some isolated surface accumulations of blue green algae (cyanobacteria) along small sections of the east side of the lake. The very slight westerly winds are accumulating the algae that seem to be concentrating at the surface and shifting them to the shoreline areas. So far we are not seeing any or have not heard about any accumulations on the west side of the lake. On the east side, we have gotten calls or inspected sites from the northeast section of the lake through the Cottage City area and to Vine Valley. The vast majority of the shoreline area is algae free, with small pockets of algae interspersed along the shoreline.

The good news is that our water clarity readings (secchi disk) have gone from 4 meters (10 days ago) to 8 meters today! This substantial increase in clarity seems inconsistent with the accumulation of blue green algae on the shoreline, but we think the hot calm weather is causing the remaining algae to come to the surface and thus get pushed to isolated sections of the shoreline. We will continue to monitor these areas and ask residents to email us photos or give us a call to provide observations. With the warm sunny weather, conditions can change quickly on the lake and can vary throughout the lake. However, the increase in clarity has me hopeful that we will not experience anything like we did last year.

We collected two water quality samples, one shoreline sample in the most concentrated area of blue green algae that we could find and the second sample was an open water sample where we did see “dots” in the water indicating some algae at the surface. These samples have been transported to SUNY-ESF for analysis for both the concentration of blue green algae and whether the algae is producing the toxin.

The biggest take home message is to stay out of these areas where the algae is accumulating. Most likely, these areas would be above the DEC bloom criteria. At the same time, large sections of the lake continue to be free of accumulations of algae and the overall clarity is great for this time of year. Please continue to use the visual indicators to look for blooms using our guide or visit the NYS DEC website. We will update our websites when we get the results back from SUNY-ESF or if we get any new information on changes to the quality of the lake.

Please contact us if you see anything suspicious on the lake or if you have any questions or observations. The lake surface is 10,500 acres and has 36 miles of shoreline so the more eyes the better!

To report suspicious blooms contact:

Kevin Olvany
Canandiagua Lake Watershed Council Program Manager
kevin.olvany@canandaiguanewyork.gov
(585) 396-3630

August 27, 2016 Water Quality Update

Dr. Gilman completed our monthly lake sampling on Friday and the clarity was holding at 4 meters at both mid lake stations. Dr. Gilman also reported that there was no surface streaks or concentrations of algae observed on the lake. Nutrient samples were collected and will be sent to our certified lab for analysis. Dr. Gilman also collected samples from six sites throughout the lake and completed laboratory analysis for total chlorophyll-a, which is a measurement of all types of algae in the water. These readings ranged from 2.47ug/L to 7.44ug/L of total algae. The DEC bloom criteria is 25ug/L of just Blue Green algae, so these results further confirm that we are well below levels that are concerning. With the warm sunny weather, conditions can change quickly on the lake and can vary throughout the lake. Please continue to use the visual indicators to look for blooms using our guide or visit the NYS DEC website. Please contact us (396-3630) if you see anything suspicious on the lake or if you have any questions or observations. The lake surface is 10,500 acres and has 36 miles of shoreline so the more eyes the better!

August 25, 2016 Water Quality Update

The Watershed Council partnered with Finger Lakes Institute (FLI) and Watershed Association Board Member Ted Carman, (who provided the boat), to monitor the lake at multiple locations yesterday using both FLCC’s YSI blue green algae probe and using the FLI’s blue green algae fluoroprobe. We observed were very low concentrations of blue green algae in the lake. Our highest concentrations were approximately 2.4 ug/L of blue green algae, while the DEC criteria for a bloom is 25 ug/L. We also saw an increase in water clarity to 4.1 meters from previous readings that were around 3.2 meters last Friday. We are not seeing any surface streaking of algae and have not seen any concentrations in the near shore areas.

This is good news. However, as we learned last year, conditions can change quickly on the lake and can vary throughout the lake. Please continue to use the visual indicators to look for blooms using our guide or visit the NYS DEC website. We will send notification if we get any new information on changes to the quality of the lake. Dr. Gilman will be out on the lake Friday doing our normal monthly lake sampling and we will post our available results Friday evening or Saturday morning. Please contact Kevin or Kim at the addresses below if you see anything suspicious on the lake or if you have any questions or observations. The lake surface is 10,500 acres and has 36 miles of shoreline, so the more eyes the better!

August 22, 2016 – Water Quality Update

We received the results from the three surface water grab samples that were collected on Friday. The good news is that the surface water sample results are not showing any real concentration of blue green algae (specifically microcystis) and is clear of toxins. At the same time, our overall water clarity is still well below average (3 meter range) in the open water areas and microscopic analysis by Dr. Bruce Gilman identified microcystis as the dominant algae. Based on this, we think there may have been a higher concentration of microcystis below the surface of the lake, but still substantially below bloom levels. The rain event on Sunday and the northwest winds of Monday have mixed the algae throughout the water column reducing the potential for high concentrations. We still have not seen any surface streaking or concentrations in the near shore areas like we saw last year.

We will continue to partner with Dr. Bruce Gilman and others to monitor the lake and encourage residents to contact us if they see any suspicious blooms. It is important to remember that microcystis has been in the lake for a very long time. The concern is when you get high concentrations of microcystis. The test results and visual observations are telling us we do not have high concentrations of microcystis that would be cause for concern, but lake conditions can change pretty quickly and there can be substantial variability in concentrations across the lake. Please use the visual indicators to look for blooms using our guide or visit the NYS DEC website. We will send updates if we get any new information on changes to the quality of the lake.

August 20, 2016 – Water Quality Update

We are starting to see a decrease in water clarity resulting from an increase in algae in the lake. Secchi disk readings have decreased from 4.5 meters to 3.2 meters in the last week. The dominant algae is microcystis, which is the blue green algae that bloomed last year. However, we are not seeing surface concentrations like we had last year and have not reached bloom levels. Water samples have been sent in for analysis, and we will post the results as soon as we receive them.

Based on our observations today, the near shore areas had good water clarity and the algae was observed in the open water areas. Conditions can change quickly on the lake, as the algae can move up and down in the water column and can be pushed to different areas of the lake by the wind. Use caution and avoid any suspicious blooms if you see one.

See our quick blue green algae guide or visit the NYS DEC website and NYS DOH website for more information on blue green algae. If you have any questions or see a suspicious bloom, please email us at kevin.olvany@canandaiguanewyork.gov and kmcgarry@canandaiguanewyork.gov .

April 25, 2016 – A Warning Against Lawn Waste in the Lake

Spring cleaning of a lawn should not equate to trashing the lake.

This photograph shows yard debris that was pitched into Canandaigua Lake this week. Fortunately, this incident was halted by the Canandaigua Lake Watershed Inspector before the remainder of the yard waste raked to the shoreline was thrown into the water.

Yard Waste in the water is broken down by bacteria, releasing nutrients that feed algae and water weeds.

Composting facilities are available at Town transfer centers if residents are unable or unwilling to compost or shred leaves at home. There are other ways to clean the lawn than by using debris to grow more algae and water weeds in the lake.

October 10, 2015 – CLWA Review of Everwilde DEIS

CLWA submitted a review of the proposed Everwilde Inn and Spa Draft Environmental Impact Statement to the Town of South Bristol on October 19th, 2015.

To read the letter: REVIEW of EVERWILDE DEIS_CLWA_10.19

September 25, 2015 Blue Green Algae Update

Three samples were collected yesterday early afternoon and transported SUNY-ESF in Syracuse to better understand current Blue Green algae and microcystin (toxin) levels in the lake. Based on the gentle north east wind patterns two samples were collected along the West side- one at Onanda (off the fishing pier), and the second site was just south of Menteth Point where algae was concentrating in an isolated patch along the shore. The third site was in the middle of the lake across from the Yacht Club where some streaking of algae was occurring and visible dots of algae could be seen in the water.

The Onanda Fishing Pier and Yacht Club samples best represent the general water conditions in the lake where as the site just south of Menteth Point represents the small patches of higher concentrations of algae that we see collecting in shoreline areas and are the areas we tell people to definitely avoid.

The table below shows the results of the three samples. The Onanda Fishing Pier and Mid Lake Yacht Club samples are showing some Blue Green Algae and Microcystin levels, but both sites are below the NYS Dept. of Health recreational contact limit of 10ug/L for microcystins. Conditions can change on a 10,553 acre lake so continue to use caution through the weekend.

Areas with concentrated blooms should be avaoided. Image taken just south of Menteth Point (sample site).

The third site (see picture) just south of Menteth Point represents the small patches that need to be avoided. These areas tend to accumulate at the shoreline based on wind patterns. The table below provides the sample results. Pictures are also provided for each of the locations to help with understanding what these levels look like. Overall, caution still needs to be used before entering the water and use your visual indicators to determine if algae blooms are present.

Location	Total chlorophyll	Blue green algae chlorophyll	Microcystins Concentration
Onanda Fishing Pier	2.1 ug/L total	0.6 ug/L	0.3 ug/L
Mid-lake Yacht Club	7.1 ug/L total	3.7 ug/L	1.75 ug/L
Small isolated area with concentrated bloom just south of Menteth Point	94 ug/L	83 ug/L – Bloom	17.6 ug/L

More information on the results:

Blue Green Algae abundance is based on blue-algal specific chlorophyll where low represents 0-3, medium 3-10, high 10-30, and bloom >30 ug/l blue-green algal chlorophyll.

World Health Organization Guidelines for interpretation of the results based on the presence or absence of known cyanobacteria toxins. In cases where no toxin was detected, the risk category is estimated from the detection limit. Blue-green algae may pose a risk from compounds other than the measured toxins and therefore all blooms should be avoided.

US-EPA has recently released its guidelines for drinking water. Those guidelines are 1.6 ug/L (adults) and 0.3 ug/L (infants) for 10 days.

0.0-0.3 μg/L Little to no risk from blue-green algal toxins: Minimal Toxicity.

0.3-1.0 μg/L Toxin detected but below the WHO drinking water guidelines: Low Toxicity

1.0 – 10 μg/L Toxin levels are above the WHO drinking water guidelines but generally below the limits for recreational contact: Moderate Toxicity

10-20 μg/L Toxin levels are significant and approach the WHO limit for recreational contact: moderate-high Toxicity

>20 μg/L Toxin levels exceed the WHO guidelines for recreational contact: High Toxicity. Users should avoid contact with the blooms.

If anyone has questions or observations over the weekend, please call my cell phone (747-8719) or email me at Kevin.Olvany@canandaiguanewyork.gov.

Onanda Fishing Pier sample site

Mid Lake Yacht Club sample site

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September 23, 2015 Update

The City Pier Sample had a toxicity of 3.5ug/L and the City Dock had a toxicity of 1.2ug/L. Both of the samples are below the Health Department’s limit of 10ug/L for recreational contact.

The warm, sunny and very calm wind conditions of yesterday afternoon increased the concentration of surface algae in the northern third of the lake. We are expected to have a north wind of 5-10mph today that will hopefully mix the algae and reduce surface algae concentrations.

Continue to use caution before entering the water and use the visual indicators to determine if a bloom might be present. Please call Watershed Manager Kevin Olvany’s office phone (585) 396-3630 or cell phone (585) 747-8719 if you have any observations or questions.

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September 21,2015 BGA Update

September 21, 2015 Watershed Council Program Manager update: The weather conditions over the weekend and today have not been favorable to continued algal growth. Most shoreline areas have been free of algal blooms with fairly clear water along the near shore areas. We collected two water quality samples this morning and transported them to Syracuse ESF for Blue Green Algae and Microcystin analysis. The samples were collected along the City Pier where there was visible evidence of algae building up along the Pier and off the City Dock (near Canandaigua Lady) to represent more general water quality conditions. The City Pier had a concentration of 6.3ug/L of Blue Green algae and the City Dock had a concentration of 1.7ug/L. Both of these samples are well below the NYS-DEC bloom criteria of 25ug/L of Blue Green Algae. We are awaiting the Microcystin (toxin) results, which should be available sometime tomorrow morning (Tuesday- 9/22).

I toured the northern third of the lake this afternoon by boat and there was no visible algae concentrations on the water surface, except in the northwest section of the lake near the City Pier. Most of the lake visually looked like the sample that was collected near the City Dock this morning. This is also encouraging news compared to what we were seeing last week! However, water clarity measurements in the middle of the lake using the secchi disk were slightly less than they were last week. This is telling us that there is still an elevated population of algae in the water column. We are working with FLCC to analyze algae species composition to see if the types of algae/zooplankton might be changing.

The forecast calls for increasing air temperature and sunny conditions throughout the week. This will potentially repeat the scenario that happened last week with increased algae at the surface. Therefore, lake users need to use caution before entering the water and continue to use the visual indicators to determine if a bloom might be present. Please call my office phone (585) 396-3630 or cell phone (585) 747-8719 if you have any observations or questions. We are planning a more formal presentation on this unprecedented increase in algae on the lake and will keep the public informed on the date/time and location of the presentation.

September 17, 2015

From today’s Daily Messenger: : Algae worsens on Canandaigua Lake. Here are some images from the past several days:

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September 16, 2015 Blue Green Algae & Lake Foam Update

Watershed Council Program Manager Update: Today’s 80 + degree F temperatures along with sunny calm conditions have provided the right conditions for increased algae levels on the lake. Conditions are worsening on the lake and there are full bloom conditions in multiple areas including the north end of the lake along Kershaw. We are also getting reports that the southern portion of the lake is also seeing an increase in algae. Please continue to follow the various advisories that have been posted around the lake

Image captured by CLWA Member Andrea Vittum

As many of you have noticed, we are also seeing substantial white foam on the lake over the last 10 days. The foaming of surface waters on lakes is not a new phenomenon. It is a natural process that has been going on for a long time in many different parts of the world. Foam is created when the surface tension of water (attraction of surface molecules to each other) is reduced and the air is mixed in, forming bubbles. When organisms, such as algae, plants, fish and/or zebra mussels die and decompose they release cellular products (surfactant) into the water, which reduces the surface tension. When the wind blows, the waves on the lake agitate this surface agent, thus transforming it into sudsy white foam. Currents and boats also mix air with the organic compounds present in the lake to produce foam. The foam will frequently form parallel streaks in the open water, caused by wind-induced surface currents. It will also collect in large quantities on windward shores, coves, or in eddies. This is especially true on the east shore of Canandaigua Lake. Over the past years Skaneateles Lake, Cayuga Lake, Keuka Lake and Oneida Lake have also experienced foam. We have also had substantial foam on the lake in September of 2001 and then again in 2006. We have periodically seen foam in recent years as well. In 2002, the Watershed Council worked with Dr. Greg Boyer, a leading researcher from the State College of Environmental Science and Forestry in Syracuse, to collect and analyze foam samples from Canandaigua Lake. The purpose of the research (included Dr. Bruce Gilman of FLCC, and Webster Persall of DEC) was to try to scientifically link the production of foam to its source. Samples were analyzed for organic matter, lipids, protein, carbon, carbohydrates, fatty acids and nitrogen. The chemical testing on the foam however could not definitively pinpoint the source of the foam, but did show a mixture of plant and animal organic matter. Results did rule out any man-made sources. We are going to reach out to Dr. Boyer to see if he can analyze this year’s foam.

There are two main theories we are investigating. We are going to try to determine if there has been a die off of Quagga Mussels that cumulatively excreted large amounts of surfactants (organic matter) into the water creating the foam. The second theory is that ecosystem changes wrought by Quagga Mussels, such as an increase in blue-green algae, may also be a contributing source. In 2001/2002, we documented a temporary Zebra Mussel die-off through age-classification of Zebra Mussels in the Lake. Analysis performed by Finger Lakes Community College showed that the overwhelming population of living Zebra Mussels collected in eight different lake locations was less than six months old. We are going to try to do the same analysis for Quagga Mussels which have largely replaced Zebra Mussels in the lake.

Those who live on the shoreline can help us by investigating your shoreline for empty Mussel shells. Please let us know what you find! We hope to have Dr. Greg Boyer out for a presentation sometime this fall to discuss the substantial increase in Blue Green algae on Canandaigua Lake and what his research is documenting across New York State. We will keep you posted.

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September 11, 2015 Blue Green Algae Advisory Update

September 11, 2015 Watershed Council Program Manager update: We received the latest results from SUNY-ESF Syracuse for our latest round of blue green algae and Microcystin sampling. This set of samples was focused on the race course for the upcoming triathlon. Samples were collected yesterday morning by me and the triathlon race coordinator dropped them off at the Syracuse lab. Conditions along the race course looked similar to what we were seeing on the lake yesterday morning so they are a good indicator of what we are generally seeing on the lake. There was visible algae in the water column, but no streaking or full bloom conditions. Three samples were collected along different sections of the race course, near shore (100 yards out), middle of the course (1000 feet out) and then about 1/2 mile from shore. The near shore sample had a toxin level of 1.40ug/L, the middle race course had 1.03ug/L, and the end of swim course had 1.14ug/L. These are encouraging numbers as they are well below the NYS- Dept. of Health (10ug/L) and World Health Organization (20ug/L) recreational contact limits. We have also done extensive lake (by boat) and shoreline (by car) visual monitoring over the last few days.

Thursday and Friday are showing fairly clear shoreline conditions except for some isolated areas where there are pockets of algae streaks to one full bloom condition in a small area on the northeast side of the lake. Lake clarity in the middle of the lake is not changing much with readings continuing to show about 3 meters with a couple spots just below 3 meters and some spots getting to 3.7 meters. This is telling us that there is still a significant population of blue green algae in the water. Please continue to follow the various advisories that have been put on the lake. Also, feel free to call my cell phone over the weekend 747-8719 if you have any questions or observations.

From the NYS Health Department website: https://www.health.ny.gov/environmental/water/drinking/bluegreenalgae.htm

Blue-green algae, technically known as cyanobacteria, are microscopic organisms that are naturally present in lakes and streams. They usually are present in low numbers. Blue-green algae can become very abundant in warm, shallow, undisturbed surface water that receives a lot of sunlight. When this occurs, they can form blooms that discolor the water or produce floating rafts or scums on the surface of the water.

What are the potential health effects from drinking or coming in contact with water containing blue-green algae?

Some blue-green algae produce toxins that could pose a health risk to people and animals when they are exposed to them in large enough quantities. Health effects could occur when surface scums or water containing high levels of blue-green algal toxins are swallowed, through contact with the skin or when airborne droplets containing toxins are inhaled while swimming, bathing or showering. Consuming water containing high levels of blue-green algal toxins has been associated with effects on the liver and on the nervous system in laboratory animals, pets, livestock and people. Livestock and pet deaths have occurred when animals consumed very large amounts of accumulated algal scum from along shorelines. Direct contact or breathing airborne droplets containing high levels of blue-green algal toxins during swimming or showering can cause irritation of the skin, eyes, nose and throat and inflammation in the respiratory tract.

Recreational contact, such as swimming, and household contact, such as bathing or showering, with water not visibly affected by a blue green algae bloom is not expected to cause health effects. However, some individuals could be especially sensitive to even low levels of algal toxins and might experience mild symptoms such as skin, eye or throat irritation or allergic reactions. There is less information available about the potential health effects of long-term exposure to low levels of blue-green algal toxins. Some limited evidence from human studies suggests that long-term consumption of untreated surface waters containing high levels of blue green algal toxins could be associated with an increased risk of liver cancer. However, people in these studies also were exposed to other factors associated with liver cancer. As a result, it is unknown whether algal toxin exposure contributed to this risk. Long-term, continuous exposure to algal toxins in the Northeast is unlikely, because blue-green algal blooms are likely to occur only during the hottest part of the summer. New York State public water supplies that use surface water sources also have operational controls to minimize the introduction of blue-green algae in drinking water.

How do I know if I am being exposed to blue green algae? People should suspect that blue-green algae could be present in water that is visibly discolored or that has surface scums. Colors can include shades of green, blue-green, yellow, brown or red. Water affected by blue-green algal blooms often is so strongly colored that it can develop a paint-like appearance. People should suspect that blue-green algae could be present in water that is visibly discolored or that has surface scums. Colors can include shades of green, blue-green, yellow, brown or red. Water affected by blue-green algal blooms often is so strongly colored that it can develop a paint-like appearance.

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Sept 9, 2015: Update on the Blue Green Algae Advisory

September 9, 2015- We received the results from the Syracuse Lab that the microcystin-LR is present in the lake. Microcystin-LR is a toxin that can be produced by blue green algae. These results are associated with a water sample that was collected on September 1st and had the highest Blue Green Algae level sampled on the lake (39ug/L). The microcystin-LR levels were 16.7 ug/l, just below the World Health Organization elevated risk threshold of 20 ug/l for swimming. Results that are in the 10-20 μg/L microcystin-LR toxin levels are significant and approach the WHO limit for recreational contact. This sample was collected in an obvious bloom area. Based on these results and continuing increased algae levels in the lake; extra caution should be used before entering the lake. Conditions change quickly on the lake. Before entering the lake, continue to use visual cues to determine if it is safe. Look for visibly discolored water or that has surface scums. Colors can include shades of green, blue-green, yellow, brown or red. Water affected by blue-green algal blooms often is so strongly colored that it can develop a paint-like appearance. For more guidance on visual cues, please visit the NYS DEC and DOH blue green websites. Blue-green algae may pose a risk from compounds other than the measured toxins and therefore all blooms should be avoided. Conditions along the western side of the lake along with reports from the east side of the lake were documenting very high pockets of algae.

From the NYS Health Department website: https://www.health.ny.gov/environmental/water/drinking/bluegreenalgae.htm

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Update: Blue Green Algae Toxicity Reports

September 8, 2015- Toxicity results came in today for water samples that were sent to the lab in Syracuse for further analysis. One of the most concerning samples that was send was taken from the middle of the lake (just north of the Yacht Club) where there was visible surface streaking and discoloration. Local analysis by Dr.Bruce Gilman discovered that this was the highest Blue Green Algae level sampled on the lake, with the total chlorophyll level at 46 ug/L and a blue green chlorophyll level of 39 ug/L. This sample was then sent to Syracuse to determine whether the algae was producing a toxin that can make it harmful to humans and animals.

The toxin results from this sample came in today showing microcystin- LR levels of 16.7ug/L, which is just below the World Health Organization elevated risk threshold of 20 ug/L for swimming. The Blue Green Algae Advisory is still in full effect. These results do not represent conditions across the entire lake, but precautions should be taken before entering the lake in any location. The confirmed presence of toxins in the water heightens the risk factor associated with swimming in the lake. Please give a good visual inspection before entering the lake, look for signs of blooms, and avoid contact if they are observed. We encourage you to review the Department of Health and DEC websites for additional information on Blue Green Algal Blooms. Additional samples were collected today and sent to the Syracuse lab for further analysis. These samples were from the North end of the lake (off the City dock), and from the West side (Butler Rd. Beach). We are expecting those results within the next day or two, and will send notification once they are received.

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Blue Green Algae Advisory Update

September 5, 2015 – Today, the Department of Health conducted a test for microcystin, a type of toxin that may be produced by blue green algae, at Deep Run Beach. The test came back negative for the presence of microcystin and the beach is now reopened. Although this test is encouraging, the results do not represent conditions across the entire lake, so the lake continues to have a blue green algae advisory and precautions should be taken before entering the lake in any location. As evidence, the Department of Health also conducted a visual inspection of the beach at Onanda Park today. The beach contained visible levels of blue green algae. Based on Department of Health guidelines, Onanda Park Beach will remain closed. We are still waiting on additional toxin test results for other parts of the lake from the lab in Syracuse. These results will be posted on the website as soon as they become available.

Even though some of the beaches are opened today, Canandaigua Lake still has a blue green algae bloom advisory. Water clarity readings from this morning suggest that algae levels are still significantly higher than average on the lake. Conditions can change quickly on the lake, so continue to use caution before entering the lake in all areas. Please continue to follow the recommendations for blue green algae blooms from the Department of Environmental Conservation and Department of Health.

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Update: Blue Green Algae Advisory Still Active

September 4, 2015 – As reported on Wednesday evening, the water samples that were collected earlier this week that came back with elevated levels of blue green algae were sent for further testing to a DEC lab in Syracuse. The additional analysis is to determine whether or not the algae is producing a toxin that can be harmful to humans and animals. This evening, we received word from the DEC that the lab in Syracuse that is running the toxicity samples has been swamped with Blue Green Algae samples from across the state. They are also having some temporary technical issues that they hope to get resolved. CLWA is working closely with the Watershed Manager and will report DEC results as soon as they become available to us.

The latest lake conditions for Friday, September 4th, 2015– The conditions along the shoreline in the morning hours were good in many spots, but by mid-afternoon Butler Road beach and Onanda Beach closed due to algae concentrations in the beach area. Kershaw beach was able to reopen due to continued absence of blooms in the beach area. Watershed Manager Kevin Olvany collected 10 samples this afternoon from various areas around the lake to get a sense of overall algae levels as represented by total chlorophyll-a levels. All samples were collected as a grab sample going from the surface down about 4 inches. Samples were collected by boat and were both mid lake and near shore samples. Dr. Bruce Gilman (FLCC) just completed the analysis and the results document that the algae levels are 2 to 3 times higher than what they normally are. We ranged from 4.33ug/L to 10.72ug/L of chlorophyll-a. It is important to point out that two samples were collected Thursday afternoon that had results of 21.19 and 31.23 ug/L of chlorophyll-a. These samples were collected very close to shore in areas with obvious and substantial bloom conditions. Bruce identified that microcystis was the overwhelmingly dominant algae in the lake. Secchi disk measurements (measures clarity) were consistently in the 3.0- 3.5 meter range at these sites and other sites around the lake. We typically average about 6-7 meters this time of year.

The County Health Department’s and our advisory is still active. The concentrations of algae change substantially throughout the day for a variety of reasons. Please use caution before entering the water and avoid water that looks green, has streaks of algae on the surface, looks like a blue/green or yellow film is on the surface and finally if there is a surface scum layer (please see image below). For additional information on the issues at hand, visit The Department of Health webpage, as well as the DEC webpage on Blue Green Algae.

If you come across algae that fits the above description, you can report it to the Watershed Manager, Kevin Olvany at (585) 747-8719. If you are a Secchi Disk volunteer with CLWA and are out on the lake this weekend, we would appreciate you forwarding your results as soon as you are able. Secchi Disk readings from many locations around the lake are extremely helpful in the ongoing monitoring of the health of the lake. Please make note any visual indicators of blue green algae in your data as well.

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Advisory: Blue Green Algae Observed on Canandaigua Lake

September 2, 2015 – Watershed Manager Kevin Olvany and Dr. Bruce Gilman of FLCC along with our citizen volunteers have been sampling and monitoring Canandaigua Lake and have identified a reduction in clarity from 6.4 meters to 3- 3.5 meters from Friday August 28th to Tuesday September 1st, along with an associated increase in algae. Observations included algae producing streaks along the surface. Two algae samples were collected by Kevin Olvany on Tuesday in the algae streak areas to compare to the results from Friday which ranged from 4-7 ug/L of chlorophyll levels (surrogate for algae levels) across 6 sampling locations throughout the lake. The two samples that were collected on Tuesday were in the northern portion of the lake in two areas with higher densities of algae observed from the boat- specifically surface streaks of algae. Samples were transported to the NY State sanctioned lab for algae analysis- State College of Environmental Science and Forestry (SUNY ESF) in Syracuse to identify and quantify the concentration of algae in the two samples collected. The lab results were received on Wednesday evening and identified that the dominant algae is a blue-green algae- specifically microcystis. The lab was able to separate out the concentration of total chlorophyll and Blue Green chlorophyll. The first sample collected was in the middle of the lake about 1,000 feet south of the 5 mph buoy markers (about ½ mile from Kershaw Beach). The results were 15ug/L of total chlorophyll and 8ug/L of Blue Green chlorophyll levels. The second sample was also collected in the middle of the lake just north of the Yacht Club in another surface streak of algae and the results were more concerning. The total chlorophyll level was 46 ug/L and a blue green chlorophyll level of 39 ug/L, which exceeds the DEC bloom criteria of 25-30 ug/L. These samples are undergoing additional analysis to determine whether the algae is producing a toxin that can be harmful to humans and other animals. Those results should be available by Friday.

It is important to point out that concentrations of algae can vary significantly across the lake based on wind conditions and other variables. The samples were purposely collected in the areas that had higher concentrations to get a sense of plausible worst case scenario conditions where people would be in contact with the water. The Watershed Manager and Inspector made visual observations along both sides of the lakeshore today. The observations were showing that the southern half of the lake was much clearer than the northern half of the lake. The northeastern half of the lake seems to have the highest concentrations based on the prevailing southwesterly wind patterns. However, this can change rapidly. Additional samples were collected Wednesday along the east side of the lake based on higher concentrations visually observed.

The Watershed groups are working closely with the Department of Health and DEC to document the algae levels and to determine if the algae is considered to be a harmful to humans and animals. The goal of this advisory is to notify the public along with asking for observations over the next couple of weeks. Please contact Watershed Manager Kevin Olvany’s cell phone with any observations (585) 747-8719 or by e-mail: Kevin.Olvany@canandaiguanewyork.gov. Blue green algae (also known as cyanobacteria) are naturally occurring in lakes and ponds, though in certain conditions blooms can occur when algae multiply quickly in a short period of time – usually in warm, calm water. Many lakes are dealing with this issue and they have concentrations much higher than our lake. However, the surface streaking and the high blue green concentrations are not a common occurrence on this lake and needs to be taken seriously. At the same time, there are large sections of Canandaigua Lake that are in good shape. It is recommended that you use caution and common sense when entering the water. Be on the lookout for larger concentrations of algae and avoid contact with water that has streaks of algae, water that has a surface scum, looks like pea soup or green paint. Please exercise caution and avoid physical contact with these areas. Click here for more information regarding blue green algae.

Guidelines from the DEC Regarding Blue-Green Algae:

People, pets and livestock should avoid contact with water that is discolored or has scums on the surface. Colors can include shades of green, blue-green, yellow, brown or red. If contact does occur, wash with soap and water or rinse thoroughly with clean water to remove algae.
Stop using the water and seek medical attention if needed if symptoms such as vomiting, nausea, diarrhea, skin, eye or throat irritation, allergic reactions or breathing difficulties occur while in contact with untreated surface waters. However, swimming, bathing or showering with water not visibly affected by a blue-green algae bloom is not expected to cause health effects.
Because of their behavior, dogs are much more susceptible than humans to cyanobacterial poisoning. When toxins are present, dogs can be exposed to toxins by drinking the water, by eating washed up mats or scum of toxic cyanobacteria and by having skin contact with water. Dogs are often attracted to algal scum odors. After leaving the water, dogs can also be poisoned by grooming their fur and paws.

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CLWA submits public comment regarding Everwilde Rezoning application in South Bristol

View the letter from August 18th, 2015: Regarding the Rezoning Application of LAD Enterprises of Canandaigua, LLC for Everwilde Inn and Spa