An official website of the United States government.

We've made some changes to If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

Contact Us About Acid Rain

Report an environmental violation

Report a Violation

Report possible violations of environmental laws and regulations.

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.

Call the Acid Rain Hotline: 202-343-9620

Regular or certified mail:

Clean Air Markets Division
1200 Pennsylvania Avenue, NW
Mail Code 6204M
Washington, DC 20460

Overnight mail:

Clean Air Markets Division (6204M)
1201 Constitution Avenue, NW
Room 7231B
Washington, DC 20004
Tel: (202) 343-9790