S. 93 · Where this bill is now
In the House
Passed the Senate Sep 10, 2025. Received Sep 11, 2025; no House vote yet
What this bill does
In plain words · AI-written from the official summaryExpands research on harmful algal blooms
Harmful algal blooms are sudden explosions of algae that can poison water and harm wildlife and people. This bill extends and expands programs that monitor, predict, and prevent these blooms in oceans, coastal areas, and freshwater systems like lakes and rivers. It requires government agencies like NOAA and the EPA to do more research, create early-warning systems, and develop new technologies to control these algal blooms through 2030.
How it affects you
People who live near lakes, rivers, coastal areas, or the Great Lakes could benefit most directly, since better monitoring and forecasting might help prevent toxic blooms that make water unsafe for swimming or fishing. The bill doesn't create immediate changes for most people, but it funds the scientific work that could protect water quality and public health in these communities over time.
Read the official summary (Introduced in Senate, Jan 14, 2025)
Harmful Algal Bloom and Hypoxia Research and Control Amendments Act of 2025
This bill extends through FY2030 and modifies the Harmful Algal Bloom and Hypoxia Research and Control Act to address algal blooms and hypoxia (deficiency of oxygen) in U.S. marine, estuarine, and freshwater systems. Harmful algal blooms are high concentrations of algae that may create nuisance or toxic conditions that are harmful to humans, animals, aquatic ecosystems, and the economy.
The bill directs the Inter-Agency Task Force on Harmful Algal Blooms and Hypoxia to submit to Congress an action strategy for harmful algal blooms at least once every five years. The bill also expands the task force's membership to include the Department of Energy.
The bill also expands the duties of the National Oceanic and Atmospheric Administration (NOAA) under the National Harmful Algal Bloom and Hypoxia program. NOAA must also carry out a variety of activities related to monitoring, predicting, preventing, mitigating, and responding to marine, coastal, and Great Lakes harmful algal bloom and hypoxia events. For example, NOAA must establish (1) a national network of observing systems for monitoring, detecting, and forecasting harmful algal blooms; and (2) a national-level incubator program to increase the number of strategies, technologies, and measures available to prevent, mitigate, and control harmful algal blooms.
Additionally, the Environmental Protection Agency must develop and enhance operational freshwater harmful algal bloom monitoring, observing, and forecasting programs in lakes, rivers, and reservoirs and carry out other activities related to researching freshwater harmful algal blooms and hypoxia events.
Written by AI (Claude) using only the official summary by the Congressional Research Service, the Library of Congress’s nonpartisan research staff. It can miss nuance, so check the official summary and the bill text for details.
1st SessionS. 93
AN ACT
Harmful Algal Bloom and Hypoxia Research and Control Amendments Act of 2025
Sponsor: Sen. Dan Sullivan (R-AK) · Introduced Jan 14, 2025 · Environmental Protection · 3 versions of the text
Sources: Congress.gov actions and votes · bill text from GovInfo · latest official action Sep 11, 2025: “Held at the desk.”
Sections
The wording of this bill hasn’t changed across its 3 official versions.