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Contact Us about EPA in California

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

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Report a Violation
Report possible violations of environmental laws and regulations.

Mailing Address

US EPA Pacific Southwest, Region 9
75 Hawthorne St.
San Francisco, CA 94105

Please use the form below to send us comments or questions. Be sure to include your e‑mail address if you’d like a response.