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Storm Water

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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.

Permits

• Industrial Facilities – the 2008 Multi-Sector General Permit (MSGP) for stormwater discharges associated with industrial activity
• Construction Projects – the 2012 Construction General Permit (CGP)
• Municipal Storm Systems – Permits for Municipal Separate Storm Sewer Systems (MS4s)
• About stormwater permits

Program Highlights

• EPA's National Rulemaking to Strengthen the Stormwater Program
• Stormwater resources for the ready mixed concrete, crushed stone and sand and gravel sectors
• Stormwater resources for the auto salvage sector
• Application Instructions for Sector AD of the 2008 MSGP

Discharges to Groundwater

• Underground Injection Control Program
• Stormwater Discharges Regulated as Class V Wells (PDF) (2 pp, 798K) - June 2003 Fact Sheet

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URL: http://yosemite.epa.gov/R10/WATER.NSF/Stormwater/home