Skip to main content
U.S. flag

An official website of the United States government

Here’s how you know

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

HTTPS

Secure .gov websites use HTTPS
A lock (LockA locked padlock) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

    • Environmental Topics
    • Air
    • Bed Bugs
    • Chemicals and Toxics
    • Climate Change
    • Emergency Response
    • Environmental Information by Location
    • Environmental Justice
    • Greener Living
    • Health
    • Land, Waste, and Cleanup
    • Lead
    • Mold
    • Pesticides
    • Radon
    • Science Topics
    • Water Topics
    • A-Z Topic Index
    • Laws & Regulations
    • By Business Sector
    • By Topic
    • Compliance
    • Enforcement
    • Guidance
    • Laws and Executive Orders
    • Regulations
    • Report a Violation
    • Environmental Violations
    • Fraud, Waste or Abuse
    • About EPA
    • EPA Administrator
    • Organization Chart
    • Staff Directory
    • Planning, Budget, and Results
    • Jobs and Internships
    • Headquarters Offices
    • Regional Offices
    • Lab and Research Centers
Contact Us

EPA in California

  • Be Smoke-Ready

    Check out our video for tips on how to prepare for wildfires!
  • $4.1 Million for Air Quality in Southern California

    EPA has provided the South Coast Air Quality Management District $4,177,083 to improve air quality in the South Coast Air Basin.
    News Release »
    Air Quality Grants »

  • Air Quality Guidance for Schools

    This guidance (pdf), issued by the California Air Pollution Control Officers Association (CAPCOA), is intended to assist school districts in making decisions about school activities and closures when air quality is poor.

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

Recent News

Newspaper with 'News' headline
  • Pacific Southwest Media Center
  • EPA News about California
  • Pacific Southwest Newsletter
  • Sign Up for EPA News Via Email

Popular Resources

Popular Resources for California
  • California Clean Air Technology Initiative (CATI)
  • San Francisco Bay Delta Watershed
  • San Joaquin Valley
  • U.S. Mexico Border

Public Participation

Closeup of a microphone with a meeting in background
  • Public Notices, Meetings and Events in California and other Pacific Southwest States

Environmental Information

River Landscape
  • Environmental Information Center
  • Today's Air Quality
  • Air Topics
  • Water Topics
  • Cleanup Sites

Federal & State Contacts

 
Telephone
  • EPA Pacific Southwest Office
  • Report Environmental Violations
  • California Environmental Protection Agency (CalEPA)
  • California Natural Resources Agency

Social Media

 
Social Media Share Graphic: Signs Saying "Like, Share, Tweet, Post"
  • EPA Region 9 on Twitter
  • EPA Region 9 on Facebook
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on June 2, 2022
United States Environmental Protection Agency

Discover.

  • Accessibility
  • Budget & Performance
  • Contracting
  • EPA www Web Snapshot
  • Grants
  • No FEAR Act Data
  • Plain Writing
  • Privacy
  • Privacy and Security Notice

Connect.

  • Data.gov
  • Inspector General
  • Jobs
  • Newsroom
  • Open Government
  • Regulations.gov
  • Subscribe
  • USA.gov
  • White House

Ask.

  • Contact EPA
  • EPA Disclaimers
  • Hotlines
  • FOIA Requests
  • Frequent Questions

Follow.