Air Programs

Air Permits Quick Finder
Air Home Carbon Monoxide Poisoning Clean Air Act California Clean Air Technology Initiative Indoor Air Quality	New Source Review Part 71 Permits PSD Program Overview PSD Permits Title V Permits	Transportation and Air Quality West Coast Collaborative Air Topics Index

Air Plan Actions
Recent air quality actions by state
SIP Rule collection
State and local regulations and plans to achieve healthy air quality
Alternative Test Methods
EPA Region 9 approved alternative methods.
Air Delegations
An inventory of federal air regulations delegated to state and local agencies
Air Archive
Historical files for reference purposes only

About Us
Describing Region 9's Air programs and activities
Today's Air Quality
Current air quality in the Pacific Southwest
Air Quality Maps
Regional and state maps of air issues in the Pacific Southwest
Air Quality Trends
Trends of air quality in the Pacific Southwest
Air Permits, including Title V Operating Permits, Title V Evaluations

In September 2008, EPA finalized the report “Testing of Dust Suppressants for Water Quality Impacts” (PDF). The study presents an examination of how the application of dust suppressants for improved air quality may also affect water quality and aquatic life.