Tools and guidance to assist in the environmental documentation of the air quality and conformity impact of a proposed project.
Legal Requirements
General
FHWA - Policy and Guidance on Air Quality
FHWA - Transportation Conformity Policy
FHWA - Transportation Conformity Guidance
Specific
Transportation conformity state implementation plan (SIP) and interagency consultation (WisDOT, WDNR, FHWA, FTA, EPA, and designated MPOs)
DNR/WisDOT MOA,
Transportation Conformity MOA
FDM References
FDM 22 Air Quality
FDM 20-5-15 Major State Agreement Documents - WisDOT-WDNR cooperative agreement
National Ambient Air Quality Standards (NAAQS) for Criteria Pollutants
Wisconsin Ozone and PM 2.5 NAAQS Status 
January 13, 2025
EPA - Criteria Air Pollutants Webpage
EPA - Nonattainment Areas for Criteria Pollutants (Green Book)
FHWA Information
Transportation Infrastructure Resilience
Sustainability Highlights Newsletter
Wisconsin Department of Natural Resources Information
Wisconsin Statewide Air Quality Monitoring Data
Wisconsin DNR Air Quality Webpage