The Fifth Circuit vacated and remanded a lower court decision that imposed no penalties against an oil company for alleged CAA permit violations at its industrial complex in Baytown, Texas. An environmental group filed a CAA citizen suit against the company, alleging violations that occurred thousan...

The Supreme Court of Texas held that the Texas Clean Air Act and the Act’s enforcement mechanisms in the Texas Water Code preempt a Houston air-quality ordinance. The Houston ordinance’s enforcement provisions are inconsistent with the statutory enforcement requirements. The ordinance allows cri...

The D.C. Circuit, in an unpublished opinion, dismissed a petition challenging an EPA computer model that states must use to estimate motor vehicle emissions when developing their strategies to comply with the CAA. Kansas and Nebraska, as well as two nonprofit organizations, alleged that the model is...

The Fifth Circuit upheld an individual's sentence and conviction for wire fraud, money laundering, and CAA violations for selling false renewable fuel credits. The individual represented to EPA and to fuel companies seeking to purchase renewable fuel credits that he manufactured renewable fuels when...

A district court ordered EPA to either promulgate revised emissions standards for the the pulp mill and nutritional yeast manufacturing source categories, or issue a determination that such standards are not required under the CAA. EPA promulgated emissions standards for both of these major source c...