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  2. EPA in Arizona

EPA in Arizona: Topics and Resources

EPA’s Pacific Southwest (Region 9) implements and enforces federal environmental laws in Arizona, California, Hawaii, Nevada, the Pacific Islands, and 148 Tribal Nations.

Additional Resources

  • About EPA in the Pacific Southwest
  • Arizona Department of Environmental Quality (ADEQ)
  • Arizona Emergency Information Network (AzEIN)
  • EPA News Releases
  • Public Notices, Meetings and Events
  • Laboratory Services
  • Report a Violation
  • Today's Air Quality
  • Library Services

Air

  • Approved Air Quality Implementation Plans
  • Clean Air Act Permitting in Arizona
  • West Coast Collaborative: Partnering to Reduce Diesel Emissions
    A public-private partnership committed to reducing diesel emissions and advancing clean technologies.

Land

  • Brownfields
  • Cleanup Sites
  • Desotec US LLC (Formerly Evoqua Water Technologies LLC)

Tribal

  • Green Building Tools for Tribes
  • Navajo Nation: Cleaning Up Abandoned Uranium Mines
  • Tuba City Dump Administrative Order on Consent
  • Tribal Programs in the Pacific Southwest
    • Tribal Air Program
    • Tribal Water Program
    • Federally Recognized Tribes
    • GAP Funding
    • Newsletters
    • RTOC
    • Tribal Consultation

U.S.-Mexico Border

  • U.S.-Mexico Border Program

Water

  • Impaired Waters and TMDLs
  • Nammo Defense Systems Facility, Mesa, AZ
  • NPDES Permits on Arizona Tribal Lands (excluding Navajo Nation
  • NPDES Permitting on Navajo Nation Lands
  • Underground Injection Control (UIC) Permits
  • Water Reuse and Recycling

EPA in Arizona

  • Topics and Resources
    • Desotec US LLC (Evoqua)
      • About the Final RCRA Permit
      • RCRA Permit
      • Inspection Reports & Enforcement Actions
      • Air Emissions and Risk Assessment
      • Related Documents
    • Nammo Defense Systems
      • En español
    • Navajo Nation Abandoned Uranium Mines
    • Tuba City Dump
    • U.S.-Mexico Border Program (Border 2025)
Contact Us about EPA in Arizona
Contact Us about EPA in Arizona to ask a question, provide feedback, or report a problem.
Last updated on May 28, 2025
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