Nutrient Pollution

Harmful Algal Blooms

Harmful algal blooms are a major environmental problem in all 50 states. Known as red tides, blue-green algae or cyanobacteria, harmful algal blooms have severe impacts on human health, aquatic ecosystems and the economy.

Learn

Harmful algal bloom in St. Johns River, Florida

Stay Safe

Girl protecting her nose from algae's odor

Prevent

Aquatic bird leaving wetlands covered in algae

Science

Bright green algae