Harmful Algal Bloom and Hypoxia Research and Control Amendments Act of 2025

This bill renews and updates a law about harmful algal blooms — which are large buildups of algae in water that can be dangerous to people, animals, and ecosystems — and hypoxia, which is a lack of oxygen in water. It extends funding through 2030 and requires a group of federal agencies to send Congress a plan for dealing with harmful algal blooms at least every five years, while also adding the Department of Energy to that group. The bill gives the National Oceanic and Atmospheric Administration (NOAA) more responsibilities, including setting up a national system to monitor and forecast algal blooms and creating a program to develop new ways to prevent and control them. It also requires the Environmental Protection Agency to work on monitoring and researching harmful algal blooms in freshwater places like lakes, rivers, and reservoirs.

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