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See national section for basic information and federal regulations.
Comparison: State vs. Federal
• Rules. Missouri has developed an air emissions permitting program requiring each source that has the potential to emit an air contaminant within the state to obtain both a construction permit and an operating permit from Missouri Department of Natural Resources (DNR). In some cases, construction permits and operating permits may be combined into a single document, as can the respective applications. New major sources and major modifications must comply with the applicable provisions of Prevention of Significant Deterioration (PSD) and/or nonattainment New Source Review (NSR) depending on the attainment status of the area in which the source is located and the type and quantity of air pollutants emitted.
Missouri currently has several counties that are in nonattainment with one or more of the National Ambient Air Quality Standards (NAAQS). The provisions of nonattainment NSR apply to new major sources or major modifications in those areas, ...