A pipeline that has carried Canadian oil and gas across Wisconsin and Michigan for 70 years has become a symbol of fossil fuel politics and a test of local regulatory power.

In Sackett v. EPA, a suit filed by two homeowners who filled in wetlands on their property, the Supreme Court has drastically narrowed the definition of which wetlands qualify for federal protection.

A new study reveals wide disparities among state-issued Clean Water Act fines, and even among federal fines from regions to region. A law professor explains why it may be illegal.

Congress has approved billions of dollars to fix water and sewer systems across the US. But getting that money to needy communities depends on how states define a key word.

The Supreme Court opens its 2022-2023 session with a high-profile case that has major implications for both wildlife and landowners.

The Trump administration has used executive orders, deregulation and delays to reduce environmental regulation. Biden administration officials will use many of the same tools to undo their work.

Warmer waters, heavier storms and nutrient pollution are a triple threat to Great Lakes cities' drinking water. The solution: Cutting nutrient releases and installing systems to filter runoff.