Municipal Separate Storm Sewer System (MS4) Permits

As of March 10, 2003, if your project disturbs 1 or more acres of ground, you must get a permit from EPA to discharge storm water from your site. If your project disturbs less than 1 acre but is part of a larger plan of development or sale, you also need a permit to discharge storm water from the site.

Notice of Intent (EPA)

NPDES Information and Permits