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Harmful Algal Bloom (HAB) Cyanotoxins

Harmful algal blooms (HABs) are caused by cyanobacteria (sometimes called blue-green algae) that are bacteria that are naturally found in Ohio lakes, ponds, and slow-moving streams. Although many species of cyanobacteria and algae do not produce toxins, some species of cyanobacteria can cause Harmful Algal Blooms (HABs). The toxins produced by the HABs are referred to as cyanotoxins, some of them are neurotoxins (which affect the nervous system) and some of them are hepatotoxins (which affect the liver). These HAB cyanotoxins can potentially impact the health of people who come into contact with water where HABs are present in high numbers.

What are the Health Effects?

How do I know if my water is affected?

What are the Treatment Options?

References and Additional Resources


Page updated: 05/23/2018