Page Banner

NPDES Stormwater Program

Phase II MS4s

A Phase II MS4 is any MS4 not already covered by the Phase I permit as a medium or large MS4. Phase II MS4s are designated if any parts or the entire MS4 is located in an urban area (UA) as defined by the U.S. Bureau of the Census (based on the latest decennial census). 

Pages

Some content on this site is saved in an alternative format. The following icons link to free Reader/Viewer software:
PDF: | Word: | Excel: