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Supreme Court Narrows Wetland Protections Under Clean Water Act

On May 25, 2023, the U.S. Supreme Court issued a key ruling in Sackett v. Environmental Protection Agency, narrowing the application of the Clean Water Act (CWA). The Court decided that only wetlands with a direct and continuous surface link to permanent bodies of water—such as rivers, lakes, or streams—qualify for federal protection. This ruling significantly limits the EPA’s authority, excluding many wetlands that were previously regulated. It’s widely seen as a major shift in environmental law, redefining how the federal government can oversee and protect water resources.
EPA Responds by Updating WOTUS Definition

In reaction to the Supreme Court’s decision, the EPA and U.S. Army Corps of Engineers revised the definition of “waters of the United States” (WOTUS) on August 29, 2023. The updated rule removes the “significant nexus” standard and focuses protection only on waters with a clear surface connection to navigable waters. While the change is intended to provide more regulatory clarity, it has also sparked concern about weakening protections for vulnerable wetlands and aquatic ecosystems.
Environmental Advocates Warn of Ecological Risks

Environmental groups caution that millions of acres of wetlands could now be left unprotected, threatening vital functions like natural water filtration, flood prevention, and wildlife support. With the rollback in federal coverage, new development could occur in areas once shielded by law, raising risks to both water quality and biodiversity. Many critics say the decision undermines the foundational goals of the Clean Water Act.
States Diverge in Wetland Regulation Efforts

With federal protections reduced, individual states now determine their own wetland policies. Some, like North Carolina, have followed the narrower federal interpretation, which may reduce environmental safeguards. Others, including New York and California, are working to uphold or expand their regulations. This varying approach across states could lead to uneven levels of environmental protection nationwide (AP News).
Congressional Action Faces Political Challenges

The Supreme Court’s decision has led to renewed calls for congressional action to amend the Clean Water Act and restore broader protections. However, with ongoing political divisions in Congress, substantial legislative changes remain unlikely. Legal scholars expect future court challenges as government agencies and stakeholders continue to interpret and enforce the new regulatory framework.
Development Sector Supports the Decision

Many in agriculture, construction, and property development have welcomed the ruling, saying it eliminates regulatory uncertainty and reduces federal overreach. By narrowing the scope of federal regulation, the decision could make it easier to carry out land-use projects that previously required permits. Nonetheless, environmentalists argue that this change may endanger wetland ecosystems and compromise long-term environmental sustainability.