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San Joaquin Valley

  • San Joaquin Valley

    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.

About the San Joaquin Valley

About the San Joaquin Valley
  • Part of the San Francisco Bay Delta Watershed

Community Activities

Community Activities
  • Community Activities
  • High-Speed Rail
  • Fresno Urban Garden project

Air Quality

Improving Air Quality
  • EPA Activities for Cleaner Air
  • West Coast Collaborative to Reduce Diesel Emissions
  • Clean Air Technology Initiative
  • EPA Regulatory Air Actions

Protecting Water

Protecting Water
  • Actions for Cleaner Water
  • The San Francisco Bay Delta Watershed
  • San Joaquin River Water Quality

Restoring Land

Restoring Land
  • Cleaning Up Contaminated Land

Funding Sources

Funding Sources
  • EPA Grants and Funding
Map showing the general area of the San Joaquin Valey, between the San Francisco Bay Area nad the Sierra Nevada Mountains.
► VIDEO: Take an Aerial Tour from San Francisco Bay to the Delta and South Along the San Joaquin River

Learn More

Health Issues

  • Ground Level Ozone
  • Particulate Pollution
  • Drinking Water
  • Pesticides

Related Topics

  • EPA in California
  • AirNOW Air Quality Map
  • Children's Health
  • Water Conservation
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on April 24, 2025
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