The Sixth Circuit dismissed as moot a lawsuit seeking to preliminarily enjoin EPA's 2015 Clean Water Rule that clarified the definition of "waters of the United States" under the CWA. Ohio and Tennessee challenged the validity of the rule, arguing it extended the scope of the CWA beyond the reach of...

The D.C. Circuit upheld EPA's 2018 decision to add a wheel-covering facility in Mississippi to the NPL. The company that assumed environmental liabilities for the facility argued that EPA improperly applied the hazard ranking system regulations to the site by failing to account for the company's mit...