Harmful Algal Blooms (HABs)

HARMFUL ALGAL BLOOMS (HABs) IN MONTANA

Harmful algal blooms (HABs) are an overgrowth of algae in a waterbody and can be toxic or fatal to humans, pets and livestock. HABS are a major environmental problem. HABs are caused by excess nutrients (nitrogen and phosphorus) in water. Only some species of algae produce dangerous toxins, but these toxins can have serious consequences in recreational water bodies. To learn more, or if you suspect you have identified a HAB and would like to report on it, please click here for additional information.

(Harmful Algal Bloom photos from Montana DPHHS website)