The Trump administration said Friday that it will consider further narrowing protections for streams and wetlands under the Clean Water Act. The Environmental Protection Agency and Army Corps of Engineers issued a supplemental proposed rule that would likely reduce the bodies of water falling under federal jurisdiction.
This marks an additional step in ongoing efforts to scale back environmental regulations. The proposal builds on previous regulatory changes to the definition of "waters of the United States" — the phrase determining which waterways receive federal protections under the 1972 law.
What the Right Is Saying
Conservative Republicans and industry groups say the regulatory rollback reduces unnecessary federal overreach and returns authority to states. They argue that many waterways currently under federal protection can be adequately managed at the state level without Washington involvement.
Senator John Barrasso of Wyoming, who chairs the Senate Environment and Committee, has advocated for what he describes as common-sense environmental regulation that does not impose excessive compliance costs on farmers, ranchers, and energy producers. Agricultural organizations have long maintained that broad Clean Water Act jurisdiction creates regulatory uncertainty that hinders farming operations and infrastructure projects.
Conservative commentators argue that the original expansion of federal water authority under the Clean Water Act exceeded congressional intent and should be corrected through narrower regulatory definitions consistent with Supreme Court rulings.
What the Left Is Saying
Democratic lawmakers and environmental advocates argue that weakening Clean Water Act protections threatens public health and ecosystems. They say any reduction in federal jurisdiction would leave many waterways vulnerable to pollution from agricultural runoff, industrial discharge, and development.
Senator Sheldon Whitehouse of Rhode Island has previously argued that narrowing water protections undermines decades of progress in cleaning American rivers and drinking water sources. Environmental groups including the Sierra Club contend that local and state regulations cannot replace the comprehensive protections provided by federal law.
Progressive advocates warn that reducing Clean Water Act jurisdiction disproportionately affects low-income communities and communities of color, which often lack resources to pursue legal remedies when their water supplies are contaminated locally.
What the Numbers Show
The 1972 Clean Water Act was passed with bipartisan support and has been amended multiple times since. The definition of "waters of the United States" has been litigated extensively, including a 2023 Supreme Court decision in Sackett v. EPA that narrowed the jurisdictional standard.
According to EPA data, approximately 60 percent of stream miles and wetlands in the continental United States currently fall under some form of federal Clean Water Act jurisdiction. The supplemental rulemaking process will include a public comment period before any final regulation takes effect.
The economic impact studies cited by opponents and supporters of broader water regulations have varied significantly depending on methodology and assumptions about which waterways would lose protections under narrower definitions.
The Bottom Line
This supplemental rulemaking represents an extension of the Trump administration's efforts to reduce federal environmental regulatory authority. Environmental groups are expected to challenge any final rule in federal court, as they have with previous attempts to narrow Clean Water Act jurisdiction.
The proposal will undergo a standard public comment period before becoming final. Interested parties on all sides of the issue will have opportunities to submit feedback on how the rule change would affect waterways in their regions.
What happens next: EPA and the Army Corps will review public comments, potentially make revisions, and then publish a final rule. Legal challenges are anticipated regardless of the final form of the regulation.