Dangerous Harmful Algal Blooms: A Growing Concern for Swimmers and Boaters in Lakes and Streams Across the US

Harmful Algal Blooms (HABs) are a growing concern for swimmers and boaters in lakes, ponds, and streams across the country. These blooms can be dangerous to both humans and animals, causing symptoms such as diarrhea, nausea, vomiting, or throat irritation. The Livingston County Department of Health recently issued a Harmful Algal Bloom Advisory for Conesus Lake, which remains in effect. Officials have assured that the public water supply is safe for drinking.

Some HABs may produce toxins that are harmful to both humans and animals. These blooms are composed of cyanobacteria, also known as blue-green algae, which are naturally present in aquatic systems. HABs can turn the water green and form a thick scum on the water’s surface.

Factors contributing to the formation of HABs include certain nutrients in the water, warm temperatures, and calm winds. Efforts have been made to control the outbreaks of HABs by reducing phosphorous and nitrogen runoff from farms and sewer systems into bodies of water. New York state tracks reports of harmful algal blooms on the Department of Environmental Conservation (DEC) website.