The U.S. Supreme Court holds that a Native American tribe's and U.S. claims to additional water rights from the Colorado River are not precluded by a previous Court decision or by a 1983 consent decree entered into by the United States and the tribe. The tribe's and the government's present claims a...

The court holds that a trial court erred in resolving water right priorities in an overdrafted basin with a "physical solution" that relies on the equitable apportionment doctrine but does not consider the affected owners' legal rights in the basin. Landowners who had overlying water rights in the M...

The court holds that the U.S. government is not liable as an operator under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) for hazardous waste cleanup costs at an abandoned mine site. The court first holds that CERCLA clearly exposes the federal government to suit...

The court holds that a defendant-operator company and a defendant-transporter company are liable under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) for costs incurred in cleaning up the MIG/De Wane Superfund site in Illinois, and orders them each to pay over $2 ...

The court dismisses a township's and construction company's lawsuit against a city under the Clean Water Act (CWA) for failing to extend wastewater treatment services outside the city's boundary, even though the outlying area was included in the city's plan for a federally funded waste treatment pla...

A district court held that EPA's Multi-Criteria Integrated Resource (MCIR) Assessment and Enhanced Coordination (EC) Process, adopted to screen mountaintop mining permits, violates the CWA and the APA. The MCIR Assessment involves EPA applying the CWA §404(b)(1) guidelines and directing the Corps o...

A California appellate court reversed and remanded a lower court decision denying water districts' motion to amend a 1961 judgment that imposed a "physical solution" on the West Coast groundwater basin. The districts wanted to store water in underground dewatered storage spaces of the basin that...

The Eleventh Circuit affirmed a lower court decision dismissing individuals' claims that a city violated its NPDES permit for municipal separate storm sewer systems (MS4s). They alleged that the city's MS4 discharges into an estuary are causing and contributing to ongoing violations of the water...

A Maryland appellate court held that the state's general discharge permit for animal feeding operations complies with the CWA and state law. The general permit authorizes certain discharges but imposes requirements regarding the management of manure and its application as fertilizer. Environment...

The Tenth Circuit held that an Oklahoma city and a Texas city that entered into water contracts with one another lack standing to challenge Oklahoma's water appropriation permitting process as unconstitutional under the Commerce Clause. The claims at issue here are based on a substantive provisi...