2020 Water Quality Updates

Water Quality Update for September 25, 2020
Here at CLWA, we are still going strong with a dedicated group of volunteers continuing to submit their weekly secchi disk reports and send in shoreline HABs surveys. We thank them for their ongoing efforts to provide us with lake condition reports. Last week (week ending 9/20), 9 volunteers submitted clarity readings with a weekly average of 5.47 meters, which was an increase in water clarity from the previous week’s 5 meters (week ending 9/13). Remember that clarity is a measure of algal abundance in the water column. Volunteers also reported a drop in the average surface water temperature this past week. Clarity is increasing, and surface water temperatures are starting to decrease, which should (hopefully) result in fewer HAB reports in the coming weeks. Read More.

Water Quality Update for September 18, 2020 
Cooler daily temps and chilly nights certainly have us feeling like the end of summer is near! The cooler temps have also resulted in fewer reported blooms. However, we know they can still pop up with then conditions are just right. In fact, this week volunteers reported 3 potential blooms out of the 27 shoreline surveys that were performed. Read More.

Water Quality Update for September 11, 2020
As we reported earlier this week, on Tuesday, September 8th (the Day after Labor Day) the lake was experiencing a significant bloom event along much of the 36 miles of shoreline. Conditions ranged from areas with light streaking and heavy suspended algae, to full on pea-soup conditions. 22 bloom reports were filed by volunteers on 9/8 (see a sampling of photos below). By Wednesday – also a calm, sunny day- many shoreline areas were clear, though we did receive a few reports of mid-lake streaking. 3 bloom reports were filed on Wednesday the 9th.  Many additional shoreline and mid-lake surveys were performed by the Watershed Manager as well. Read More.

Water Quality Update for September 8, 2020
After a “quiet” couple weeks with minimal harmful algal bloom reports from staff, volunteers and the public, today’s calm, sunny and hot weather has encouraged a substantial increase in Harmful Algal Blooms (HABs) throughout much of Canandaigua Lake’s 36 miles of shoreline. We have completed visual inspections, collected samples and have received numerous reports from the north end all the way down to the Woodville area and on both sides of the lake. In most areas it is light streaking and heavy dots at the shoreline area, however we have several reports and pictures of pea soup concentrations of HABs, most notably in the northeast section of the lake. We are also getting reports of mid-lake streaking as well. Read More

Water Quality Update for September 4, 2020
So far this week, volunteers have performed 20 shoreline surveys and there have been no confirmed blooms.  Reporting weeks for the Shoreline HABs Monitoring Program run Monday to Sunday, which means there are still a few more reporting days left in this block (this reporting week ends on 9/6). Since the 2020 program launch on August 3rd, there have been 191 shoreline surveys performed – wow! We encourage our volunteers to keep up their great work in providing regular updates and reports from their zones. They will be reporting through early October. Read More.

Water Quality Update for August 28, 2020
For the second week in a row, we have seen an improvement in the weekly average water clarity, from 5.0 meters (week ending 8/23) up to 5.71 meters as of today (8/28). Yesterday’s significant and much needed storm event occurred during a very dry time, with much of the rain being absorbed by the ground. A few minor runoff issues were identified and the larger streams did not increase significantly.Read More

Water Quality Update for August 21, 2020
This week, we have seen some relief from reported blooms. So far, volunteers and watershed staff have performed 23 shoreline surveys, and no blooms have been reported. Good news! In addition, secchi disk volunteers have been reporting a slight increase in the average clarity from last week, from 4.16 meters last week (week ending 8/16) to 4.64 meters as of today (8/21). Read More

Water Quality Update for August 14, 2020
Based on samples collected this week along with visual inspections of the open water and shoreline areas by staff and volunteers, the vast majority of the lake remains well below the DEC threshold of a Harmful Algae Bloom (HAB). However, we are continuing to have a few reports from around the 36 miles of shoreline of isolated blooms. Read More

Water Quality Update for August 7, 2020
Many areas of the lake remain bloom free. However, we have received reports this week of surface streaking and “dots” in the water. We had a bloom in the Crystal Beach area on Monday 8/3 which was sampled and results came back above the bloom threshold of 25 ug/L (micrograms per liter). There has also been about a meter reduction in clarity throughout the lake system. However, many volunteers that surveyed this week did not see blooms. So overall, this information means that the lake is experiencing some isolated blooms that tend to be transient in nature. Read More

Water Quality Update for July 31, 2020
The vast majority of the lake continues to be free of any Harmful Algae Blooms (HABs). Lake researcher from Finger Lakes Community College, Patty Thompson, completed her monthly sampling of the lake yesterday and saw no surface concentrations of algae in the lake and had low chlorophyll-a levels (indirect measurement of algae) at each of the six locations sampled. The Watershed Manager Kevin Olvany was also on the lake Thursday afternoon/evening and saw no concentrations of algae at the surface. Water clarity as measured by the use of secchi disk was in the 6.0-6.5-meter range. In addition, numerous shoreline visits by the Watershed Manager showed clear conditions in most locations.  Read More

Water Quality Update for July 24, 2020
We hate to be writing our first water quality update in late July, but we are learning that conditions are becoming favorable for potential cyanobacteria (blue green algae) blooms on the lake. On Thursday, July 23rd, there was a reported bloom in the Crystal Beach area. A sample was collected and analyzed, and it was confirmed to be above the DEC threshold (25 ug/L – micrograms per liter) to be considered a Harmful Algae Bloom (HAB). Read More

Water Quality Update for June 24, 2020
Please see the following press release from Ontario County Public Health regarding the misreporting of the Butler Road beach closure. Read More