The Environmental Protection Agency (EPA) is approving the Clean Air Act (CAA) state plan revision for existing large and small municipal waste combustors (MWCs) submitted by the New Hampshire Department of Environmental Services (NHDES) on October 1, 2018. The revised state plan incorporates fuel quality standards and test methods for large MWC facilities that combust processed wood residue (PWR) from construction and demolition (C&D) debris.