A district court held that mining companies violated the selenium effluent limitations set forth in their state-issued NPDES and surface mining permits. The companies had sought permit modifications from the state's environmental agency, and when those requests were denied, the companies appeal...

The D.C. Circuit denied a petition for review challenging EPA's decision granting California a waiver from federal preemption under the CAA that allows the state to implement its own regulations requiring automobile manufacturers to reduce fleet-average greenhouse gas emissions from new motor vehicl...

A Michigan appellate court upheld the state environmental agency's concentrated animal feeding operation (CAFO) rule. The challenged rule falls within the scope of the agency's statutory rulemaking authority, is rationally related to the agency's statutory mandate to protect Michigan's waters from p...