Health Dept. Issues Harmful Algal Bloom Health Advisory for Conesus Lake

CONESUS, N.Y., Aug. 18, 2026 — The Livingston County Department of Health has issued a Harmful Algal Bloom (HAB) Advisory for Conesus Lake. This advisory was issued because there is a lake wide bloom. Blooms have been observed in multiple locations along the eastern shoreline, along with slicks being observed in the open water. Blooms can come and go based on wind direction and other environmental conditions.  People and animals should keep out of the water where blooms are present and avoid suspected areas.  The public water supply is safe for drinking.

HABs can turn the water green and form thick scums on the water surface. Some HABs may produce toxins that are harmful to people and animals.  HAB exposure can cause diarrhea, nausea, or vomiting, skin, eye, or throat irritation, and allergic reactions or breathing difficulties.  

HABs can disappear and form quickly. Be aware of what HABs look like and avoid them. To learn what HABs look like, use the links below.

The Department of Health recommends taking the following precautions:

Report symptoms that may be associated with exposure to your medical provider.

For more information, or to report a HAB, contact the Department of Health at 585-243-7280 or email the Watershed Inspector at donmaryanski@livingstoncountyny.gov  

Learn more about HABs at:

Please share this information with other people in the area who may not have received this notice directly.

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