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
About EPA
Contact Us

EPA Region 9 (Pacific Southwest)

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

Map of EPA Region 9Arizona California Hawaii Nevada
Arizona, California, Hawaii, Nevada, Pacific Islands, 148 Tribes

Alert
Alert Smoke-Ready Toolbox for Wildfires

Smoke from wildfires can adversely affect air quality and put people at health risk from smoke exposure. Public health officials and others can use the resources in the Smoke-Ready Toolbox to help educate people about the risks of smoke exposure and actions they can take to protect their health.

  • Air Quality Awareness Means Being Smoke Ready (video)
  • Concientización sobre la calidad del aire significa estar listo para fumar (video)

Coronavirus (COVID-19) Information

  • Read COVID-19 health and safety guidance for EPA employees and visitors to EPA facilities.
  • Coronavirus (COVID-19) Information from EPA
    • Español | عربى | 中文: 简体版 | 中文: 繁體版 | 한국어 | Kreyòl ayisyen | Português | Pусский | Tagalog | Tiếng Việt
  • Important Notice Regarding "Hard Copy" Submissions to EPA

Popular Topics

  • Air Permits
  • Air Quality Plans
  • Environmental Justice
  • Grants
  • Lake Tahoe
  • Navajo Nation Abandoned Uranium Mines
  • NPDES Wastewater Permits
  • Southern California Ocean Disposal Site #2 Investigation  
  • Public Notices, Meetings & Events
  • Red Hill Fuel Storage Facility
  • San Francisco Bay Delta
  • San Joaquin Valley
  • Superfund Sites
  • Tribes
  • U.S.-Mexico Border
  • West Coast Collaborative
  • Climate Change

Pacific Southwest Resources

  • Regional Administrator Martha Guzman
  • News Releases
  • Media Center
    (Media Kits, Newsletters, Videos)
  • Contact Us
  • Library
  • FOIA
  • Organization Charts
  • Public Notices, Meetings and Events
  • Visit Us

Latest Pacific Southwest News

  • U.S. and Mexico agree to invest $474M to address Tijuana River sewage problem

  • Central Valley’s Saputo Cheese Agrees to $170,000 Penalty for Clean Air Act Violations

  • EPA Awards $350,000 to Advance Environmental Justice in Hawai‘i

  • EPA Awards over $225,000 to Advance Environmental Justice in Arizona

  • Under EPA agreement, Marine Corps Base Hawaii to make improvements after stormwater violations

All Pacific Southwest News Releases

Tweets by @EPAregion9

Tweets by @EPAregion9
  • About EPA Home
  • EPA History
  • Our Mission and What We Do
  • EPA Organization Chart
  • Greening EPA Facilities
  • Mailing Addresses and Phone Numbers
  • Staff Directory
  • Visiting Headquarters
  • Visiting a Regional Office
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on July 7, 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.