Skip common site navigation and headers
United States Environmental Protection Agency
National Pollutant Discharge Elimination System (NPDES)
Begin Hierarchical Links EPA Home > OW Home > OWM Home > NPDES Home > Stormwater > Recent Additions End Hierarchical Links
Basic Information
Municipal MS4s
Construction Activities
- Construction General Permit eNOI
Industrial Activities
- Multi-Sector General Permit eNOI
Road-Related MS4s
Menu of BMPs
Green Infrastructure
Integrated Municipal Plans
Stormwater Home


NPDES Topics Alphabetical Index Glossary About NPDES

Recent Additions

March 13, 2014

  • EPA’s Discharge Mapping Tool - The new Discharge Mapping Tool is designed to help you to determine the receiving waters to which you discharge, and to determine whether the waterbodies to which you discharge are considered "impaired" under Section 303(d) of the Clean Water Act.

November 26, 2013

October 31, 2013

September 30, 2013

  • Expiration of the 2008 Multi-Sector General Permit (MSGP) - The 2008 MSGP expired at midnight on September 29, 2013. A new permit to replace it has not been issued. Facilities that obtained coverage under the 2008 MSGP prior to its expiration are automatically granted an administrative continuance of permit coverage.

September 24, 2013

  • Proposed 2013 Multi-Sector General Permit (MSGP) - The proposed 2013 MSGP provisions are largely similar to the 2008 MSGP; however, some changes have been made to improve permit clarity and enforceability, to address errors, and to make the permit more streamlined. The proposed 2013 MSGP, once finalized, will replace the 2008 MSGP, which expires September 29, 2013.
National Pollutant Discharge Elimination System Home

Stormwater Information
Recent Additions




Training & Meetings



 Register to Receive NPDES News Alerts!  

You will need Adobe Reader to view some of the files on this page. Files are best viewed in Internet Explorer and Adobe 8.0 or higher. See EPA's PDF page to learn more.


Office of Water | Office of Wastewater Management | Disclaimer | Search EPA

Begin Site Footer

EPA Home | Privacy and Security Notice | Contact Us

Last updated on January 24, 2006 11:00 AM