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San Joaquin Valley

  • Latest News

    • EPA Takes Action Against Two Northern California Landfills for Clean Air Act Violations, Minimizing Harmful Emissions
    • EPA Returns Chemical Company to Compliance with Toxic Substances Control Act
    All Recent News Releases

EPA is working with other agencies and local communities to address the unique environmental challenges in the San Joaquin Valley, including some of the nation’s worst air quality, high rates of childhood asthma, and contaminated drinking water. The San Joaquin Valley is one of the world’s most productive agricultural regions and home to four million Californians.

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

  • Air Quality

    Air Quality

    Learn about EPA activities for cleaner air in the San Joaquin Valley.

    Air Quality
  • Protecting Water

    Protecting Water

    Learn about EPA actions for cleaner water in the San Joaquin Valley.

    Protecting Water
  • Restoring Land

    Orange trees in the San Joaquin Valley

    Learn about EPA activities to clean up contaminated land in the San Joaquin Valley.

    Restoring Land
  • Community Activities

    Large group of workers from the Transform Fresno project

    Learn about EPA supported community activities to reduce environmental hazards in the San Joaquin Valley.

    Community

Learn More

Funding Sources
  • EPA Grants and Funding
Health Issues
  • Ground Level Ozone
  • Particulate Pollution
  • Drinking Water
  • Pesticides
Related Topics
  • AirNOW Air Quality Map
  • Children's Health
  • EPA in California
  • San Francisco Bay Delta Watershed
  • Water Conservation
Map showing the general area of the San Joaquin Valey, between the San Francisco Bay Area nad the Sierra Nevada Mountains.
Take an Aerial Tour of the Sacramento and San Joaquin River watersheds | Click Map to Enlarge
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on October 22, 2026
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