We've made some changes to EPA.gov. 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.

National Pollutant Discharge Elimination System (NPDES)

NPDES CSO Policy Memos

EPA released the following policy memoranda that clarify aspects of the combined sewer overflow (CSO) program and address implementation issues.

You may need Adobe Reader to view files on this page. See EPA’s About PDF page to learn more.