What are Harmful Algal Blooms (HABs)?
Marine and fresh waters teem with life, much of it microscopic and most of it beneficial and harmless. There are, however, some species of algae and cyanobacteria that cause harm, either through the production of potent toxins or through the accumulated biomass during their “blooms”. Impacts include human and wildlife illness and mortality, ecosystem disruption, and economic losses to coastal communities.
HAB Species
Learn about different toxic or harmful algal species, and the poisoning syndromes they cause
Maps
See where harmful algae are distributed in the U.S. and around the world
Impacts
Discover how harmful algal blooms impact human health and coastal economies, wildlife, ecosystems, and more
Research
Learn about the national and international research programs focused on understanding, managing, and preventing harmful algal blooms
Resources
Major programmatic and informational resources regarding harmful algal blooms, as well as fact sheets and hotlines
Response
Programs and activities focused on prediction, control, mitigation, and HAB event response
News and Announcements
