Storm Water
You will need Adobe Reader to view some of the files on this page. See EPA's PDF page to learn more.
Stormwater is generated as a result of precipitation, melting snowfall, and runoff from over-watering. In general, there are two types of pollution that can enter a waterway: non-point source pollution and point source pollution. EPA classifies stormwater running off of impervious surfaces, such as parking lots, roads, and buildings as point-source pollution.
Program Highlights
Permitting
- Industrial Facilities – the 2008 Multi-Sector General Permit for Stormwater Discharges Associated with Industrial Activity, also known as the MSGP.
- Construction Projects – the 2008 Construction General Permit, also known as the CGP.
- Municipal Storm Systems – Permits for Municipal Separate Storm Sewer Systems, also known as MS4s.
Discharges to Groundwater