For over twenty years, Margaret Campbell’s practice has focused primarily on matters arising under the Clean Air Act and state air quality statutes. She regularly advises energy companies, manufacturers and other industrial clients on state and federal clean air policy, permitting, compliance, and enforcement matters. She helps clients prepare comments on proposed federal and state air quality rules, advises clients on compliance issues and helps obtain construction and operating permits. She has successfully challenged final rules issued by the Environmental Protection Agency before the US Court of Appeals for the DC Circuit. She has also successfully defended electric utilities in Clean Air Act enforcement actions brought by the Environmental Protection Agency and the Sierra Club and obtained favorable settlements when clients prefer to avoid the cost and uncertainties of litigation.