An official website of the United States government.

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.

National Pollutant Discharge Elimination System (NPDES)


Examples of TMDLs where it might be appropriate to set the WQBEL equal to the existing effluent limits, or if known, the current actual discharge of the pollutant from the source:

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