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County On Harmful Algal Blooms: Know It, Avoid It

Pictured is a bloom on Chautauqua Lake in the early stages. This bloom cleared and returned depending on weather conditions.

The Chautauqua County Department of Health & Human Services urges area residents and visitors to educate themselves about harmful algal blooms and to be cautious when swimming, boating and fishing.

In New York state, the blooms occur most frequently in the mid to late summer months but can occur at any time of the year. Small bloom conditions can change rapidly due to changes in weather and lake currents. Larger blooms will likely persist throughout the summer once they become established.

In Chautauqua Lake, small and localized blooms have been observed, while in Findley Lake, localized blooms have been recorded near the outlet.

KNOW IT

Blue-green algae, also known as cyanobacteria, are naturally present in lakes. Nutrient rich runoff from surrounding land, warm water temperature, and sunshine encourages blue-green algae growth. With the right conditions blue-green algae forms blooms which may appear as floating “rafts” or scums on the surface of the water, these blooms are known as harmful algal blooms.

Pictured is an established bloom on Chautauqua Lake that persisted for nearly eight weeks in the summer of 2019.

Be alert and watchful for blooms which may resemble “pea soup” or have a paint-like appearance with strong colors including blue-green, green, yellow, white, brown, purple, or red. Blooms are more likely in nearshore areas than open water areas.

Harmful algal blooms present a public health risk because they can release toxins which may be harmful to human and animal health. People and pets can be exposed to toxins by contact (touching, swallowing, and inhaling water droplets) with harmful algal blooms during water recreation activities, through surface water use around the house, such as watering gardens, and through improperly treated drinking water.

Key municipal water treatment facilities in Chautauqua County test for toxins in their water when blooms occur near their intakes.

AVOID IT

Christine Schuyler, Chautauqua County director of Health and Human Services noted that not all blooms are hazardous, but the Health Department recommends taking the following precautions:

¯ When swimming, wading or boating, avoid areas with blooms or surface scums, or water that is noticeably discolored. This applies to everyone — adults, children and pets.

¯ Don’t fish or eat fish caught from areas with blooms or surface scums, or water that is noticeably discolored.

¯ Pay attention to beach closures, advisory signs, press releases, and websites. Never swim at beaches that are closed.

¯ Never drink, prepare food, cook or make ice with untreated surface water, bloom or no bloom.”

If people or pets are accidentally exposed to a bloom, use clean water to rinse off as soon as possible. Consider medical attention if people or pets have symptoms including diarrhea, nausea or vomiting, skin irritation and allergic reactions or breathing difficulties after exposure to surface waters with harmful algal blooms.

New York state and Chautauqua County have active programs aimed at reducing the amount of phosphorus and nitrogen entering streams and lakes. Watershed management plans have been developed for several lakes in Chautauqua County, including Chautauqua and Findley. As recommendations in the plans are implemented, improved water quality will follow, but it may take years to see improvements.

The state Department of Environmental Conservation and Department of Health investigate harmful algal blooms reports, sample blooms for toxins, and conduct research to learn more about HABs and toxin production.

The County Health Department monitors permitted bathing beaches for harmful algal blooms and the indicator bacteria E. coli. To best protect the public from possible illness, beaches are closed when the water exceeds bacteria safety standards and/or HABs are identified. Updates are planned throughout the summer to alert residents of changes in the status of HABs in the County.

The current status of Chautauqua County permitted public beaches and website links to additional HAB information is available on the County Website at https://chqgov.com/environmental-health/beach-closings

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