Read the full story from U.S. EPA.
Harmful algal blooms—the overgrowth of algae in water—are a major problem across the nation. Blooms occur when excess nutrients (nitrogen and phosphorus), combine with sunlight, and warm temperatures in water bodies. They can cause severe, negative impacts on aquatic ecosystems, the economy, and human health.
EPA is working with Chemehuevi and Colorado River Indian Tribes to research ways to eliminate or reduce the negative effects of harmful algal blooms. In an ongoing study, EPA and its tribal partners are evaluating the effectiveness of man-made floating vegetated islands to remove nutrients from the water along Lake Havasu and the Colorado River, within the tribes’ reservations.