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Transportation Health Impact Assessment Toolkit

Air Quality Data

For EPA National Ambient Air Quality Standards, see

IndicatorNational DatabaseLocal Resource

Daily emissions for the project region for
Ozone (O3)
Sulfur dioxide (SO2)
Nitrogen dioxide (NO2)
Particulate matter (PM(2.5/10))
Carbon monoxide (CO)

EPA State and County Level Air Quality Data

  • Click on Air Quality Index, under Monitoring
Emission levels for CO, NO2, SO2, PM2.5/10, ozone

CDC’s Environmental Public Health Tracking Network: state- and county-level air quality data concerning

  • Annual average ambient concentrations of PM2.5
  • Days exceeding the EPA regulatory standard for PM2.5
  • Days exceeding the EPA regulatory standard for ozone

Contact the state department of natural resources or the regional air quality facility.

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