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Federal
Title V Permitting Statistics Inventory
U.S. Environmental Protection Agency —
The Title V Permitting Statistics Inventory contains measured and estimated nationwide statistical data, consisting of counts of permitted sources, types of permits... -
Federal
Criteria Air Emissions Trends
U.S. Environmental Protection Agency —
The Air Emissions Trends site provides national trends of criteria pollutant and precursor emissions data based on the the National Emissions Inventory (NEI) from...