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Contact Us

Water: Septic (Onsite / Decentralized) Systems


Click on your state in the map below to get contact information, links to state web pages, and other useful information. Since state and local governments regulate septic systems, be sure to check with the appropriate state and local authorities for requirements that may apply to you.

Map of the US, split into EPA regions Region 1: Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, VermontRegion 2: New Jersey, New York, Puerto Rico, US Virgin IslandsRegion 3: Delaware, District of Columbia, Maryland, Pennsylvania, Virginia, West VirginiaRegion 4: Alabama, Florida, Georgia, Kentucky, Mississippi, North Carolina, South Carolina, Tennessee Region 5: Illinois, Indiana, Michigan, Minnesota, Ohio, WisconsinRegion 6: Arkansas, Louisiana, New Mexico, Oklahoma, TexasRegion 7: Iowa, Kansas, Missouri, NebraskaRegion 8: Colorado, Montana, North Dakota, South Dakaota, Utah, WyomingRegion 9: Arizona, California, Hawaii, Nevada, Pacific IslandsRegion 10: Alaska, Idaho, Oregon, Washington

Additional Contacts
Those systems serving more than 20 people fall under the provisions of Large Capacity Septic Systems, a section of the Safe Drinking Water Act (SDWA). Under this act, systems must be registered and present no danger of contaminating source water. Click here to view State Underground Injection Control (UIC) Contacts.

Under the Clean Water Act (CWA), 40 CFR 122.28, you need a National Pollutant Discharge Elimination System (NPDES) permit to discharge to the waters of the U.S. Click here to view the contacts for the NPDES program.

Send a Comment or Question to EPA Headquarters Decentralized (Septic) Program Staff

The Decentralized (Septic) Program welcomes your comments, including comments on how we can improve our website. You can contact us via e-mail, telephone, or mail.

Please help us to answer your comment or question by including a correct e-mail address.  If your browser doesn't support forms, you can e-mail your comment to us at decentralized@epa.gov

(Be as specific as possible)



Contact the Septic Systems program via telephone at:
(208) 378-5626


You may mail your comment or question to the Septic Systems program:

U.S. Environmental Protection Agency
Office of Wastewater Management
Municipal Support Division - 4204M
1200 Pennsylvania Ave. NW
Washington, DC 20460

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