Sunday August 20th, 2023 Honeoye Lake Water Quality
Surface Water Temperature: ~74.0 F
Water Clarity: ~3.3 Feet
Lake Level: ~802.9 Feet above sea level
Observations: Sunday (8/20/23), Over the last week the water clarity decreased by ~1.7 feet to ~3.3 feet and the surface water temperature decreased by ~2.1 F to ~74.0 F. The lake appears to be in its fall cooling pattern all ready. We found a blue-green algae bloom of varying intensity from light to heavy lake wide today which caused the drop in water clarity. In some locations we found a blue-green algae surface scum. Blooms, some of which may be severe, could be occurring at other isolated near shore locations around the lake. DEC advice is “HABs: Know it, Avoid it, Report it”
We found increasing amounts of Anabaena (Dolchospermum) (Looks like a spring), Aphanizomenom (Looks like a leaf), Microcystis (Looks like a big blob with small cells) and Planktothrix (looks like a small rod). These are all blue-green algae species. You should be watchful for blue-green algae blooms lake wide. Expect to continue to see blue-green blooms over the next few weeks. See pictures below: More information on Microcystis and Anabaena can be found at: https://www.honeoyelakewatershed.org/habs
Several research studies have found that most of the phosphorus that fuels Honeoye Lake’s blue-green algae blooms is released from the lake bottom sediments when the lake’s dissolved oxygen level goes below 0.50 mg/L in the deeper parts of the lake. The dissolved oxygen level in deep water has been below 0.5 mg/L for the last six weeks. The dissolved oxygen (DO) level near the lake bottom today was between 8-9 m (~26.5-30 feet) was 7.85-5.14 mg/L due to our first complete lake mixing event. This level of dissolved oxygen will keep the phosphorus bond to iron until the dissolved oxygen goes below 0.5 mg/L again when the lake restratifies. Lake was not stratified today, but is starting to restratify again. Today’s temperature and dissolved oxygen graphs are posted on the left. You can see that the lake has had a complete lake mixing event over the last few days on the above temperature and dissolved oxygen chart above with both the temperature and dissolved oxygen lines converging together to become almost uniform in temperature and dissolved oxygen at all water depths. This would have mixed whatever amount of phosphorus was released from the bottom sediments over the last six weeks with the whole vertical water column. We are not sure yet if this is the only source of phosphorus fueling are current isolated blue-green algae blooms or not. Other sources of phosphorus are rainstorm run-off, Zebra mussel waste products, Etc.
Please report any Honeoye Lake HABs you observe to us and DEC by submitting a HABs report at:
Always use your own visual assessment before making contact with the lake water at this time of year as the blue-green algae situation can change daily if not hourly. Please regularly check the DEC HABs alert map for more detailed updates on Honeoye Lake HABs alerts:
August FLCC Muller Field Station Events
Click on the link below to see the July Muller Field Station Newsletter:
New York Safe Boating Class Certificate will be required of all boaters on this schedule:
If born on or after: You will need boating safety certificate to operate motorized vessel in:
January 1, 1988 2022
January 1, 1983 2023
January 1, 1978 2024
All operators of motorized vessels, regardless of age, will need a boating safety certificate by January 1, 2025.
Click on the link below for more information and the schedule of local NYS Safe Boating classes:
Honeoye lake is included in the DEC's Big Panfish Study. Please click on the link below to read their Interim report:
Please visit the Honeoye DEC Project website for more information on the Honeoye Lake Nutrient Inactivation (Alum Treatment) Project: Honeoye Lake Nutrient Inactivant Pilot Study (arcgis.com)
Glacial History of Honeoye Lake
Please check out the new “Glacial History of Honeoye Lake” sign at Sandy Bottom Park.
Thank you to Dr. Bruce Gilman for the content, the Ontario County Water Resources Council for the funding, and the Finger Lakes Land Trust for the imagery.
More information on Honeoye Lake’s Geology History can be found on HLWTF web site:
Ontario County Soil & Water Conservation District featured two Honeoye Lake watershed erosion control projects in their Summer 2023 Newsletter:
Please click on this link for the Winter 2023 HLWTF Newsletter:
- Click on this link to see the new HLWTF Honeoye Lake Watershed Storm Water Took Kit if you are planning any storm water projects on your property:
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