Tools and guidance to assist in the environmental documentation of the air quality and conformity impact of a proposed project.

Wisconsin statewide air quality notices

Legal requirements

FHWA - Policy and guidance on air quality
FHWA - Transportation conformity policy
FHWA - Transportation conformity guidance

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 20-5-15 Major State Agreement Documents WisDOT-WDNR cooperative agreement
FDM 22 - Air quality chapter revision in progress; contact the Environmental services Section (608) 267-9806 with questions


See Forms and tools page for factor sheets and guidance


EPA - national ambient air quality standards (NAAQS)
EPA - AIRNow - Real-time air pollution data; see regional ozone concentrations

FHWA information

Transportation Infrastructure Resilience

Sustainability highlights newsletter

Congestion Mitigation and Air Quality Improvement Program (CMAQ)

Air quality reference material

Models and methodologies