An official website of the United States government.

Due to a lapse in appropriations, EPA websites will not be regularly updated. In the event of an environmental emergency imminently threatening the safety of human life or where necessary to protect certain property, the EPA website will be updated with appropriate information. Please note that all information on the EPA website may not be up to date, and transactions and inquiries submitted to the EPA website may not be processed or responded to until appropriations are enacted.

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 the AgSTAR Program

AgSTAR wants to hear from you!

Use the form below to let us know if you:

  • Have an anaerobic digester project story or update to share.
  • Have a technical question that is not addressed on our Implement Anaerobic Digester Projects page.
  • Want to receive updates from AgSTAR about anaerobic digester projects and programs.
  • Have general questions or feedback about AgSTAR or this website.

If you are a vendor that wants to be listed in the Vendor Directory, please use the Vendor Directory Update form.

Regular or certified mail address
MC 6207A
1200 Pennsylvania Ave., NW
Washington, DC 20460

UPS/FedEx/Overnight mail address
1201 Constitution Ave., NW
Room 4355KK
Washington, DC 20005

Please enter your name.
Enter your title.
Enter the name of your organization.
Enter your street address.
Enter your city.
Select your state.
Enter the Zip code.
Enter your phone number.
A valid email address is required to join the AgSTAR listserv.
Please enter your comments.