An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »


Guidance: Clarification of NPDES EMS Guidance on Timely and Appropriate Response to Significant Noncompliance Violations

The purpose of this memorandum is to supplement the Office of Enforcement and Compliance Assurance's national National Pollutant Discharge Elimination System (NPDES) guidance by incorporating the "Enforcement Response Timeline for Significant Noncompliance Violations at NPDES Major Facilities" into the Enforcement Management System by reference.

Issued May 29. 2008

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.