Contact EPA Pacific Southwest Air Program
Pacific Southwest, Region 9
Serving: Arizona, California, Hawaii, Nevada, Pacific Islands, 147 Tribes
Air Programs
Recent Additions
Palmdale Hybrid Power Project - Final Permit Issued
Avenal Energy Project - Administrative Amendment Permit
Sacramento 1-Hour Ozone Clean Air Act Section 185 Termination
National Links
Programs & Resources
- 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 Air permits, including Title V operating permits, Title V evaluations
Dust Suppressant Study
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.
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