According to New York State Department of Environmental Conservation (August 2019)
Because it is hard to tell a HAB from non-harmful algal blooms, it is best to avoid swimming, boating, otherwise recreating in, or drinking water with a bloom. Keep reading to learn what to do if you spot a bloom. Click on the links below for more detailed information.
Most algae are harmless and are an important part of the food web. Certain types of algae can grow quickly and form blooms, which can cover all or portions of a lake. Even large blooms are not necessarily harmful. However some species of algae can produce toxins that can be harmful to people and animals. Blooms of algal species that can produce toxins are referred to as harmful algal blooms (HABs). HABs usually occur in nutrient-rich waters, particularly during hot, calm weather.
Rinse thoroughly with clean water to remove algae.
Before you go in the water, find out what waterbodies have blooms or have had them in the past. DEC maintains a HABs Notifications page of waterbodies that currently have blooms. Please note that if a waterbody is not listed, it does not mean that it does not have a bloom. It may have one that was not reported. Find out what waterbodies have had blooms in the past on the HABs Archive page. For additional information, please see the DEC Program Guide (PDF), updated in 2019.
HABs may have the appearance of pea soup.
If you suspect that you have seen a HAB, please report the HAB to DEC.
Fill out and submit a Suspicious Algal Bloom Report Form (leaves DEC website). If possible, attach digital photos (close-up and landscape to show extent and location) of the suspected HAB in the web form. Email HABsInfo@dec.ny.gov if you are not able to complete the form.
Please report any health symptoms to NYS Health Department at firstname.lastname@example.org and your local health department (leaves DEC website)
Skaneateles Lake participates in the NYS Department of Environmental Conservation HAB Surveillance Program. Through the SLA over 35 residents have been trained in identifying and sampling HABs, are monitoring the lake weekly and coordinating response to reports of suspicious blooms from the public.
The DEC as a real time map for HABs reported in New York state. Please click HERE to view the map.
DEC site notification page: http://www.dec.ny.gov/chemical/83310.html