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Water: Stormwater

Stormwater Discharges from Construction Activities

OVERVIEW

Silt Fence at Construction Site

Stormwater runoff from construction activities can have a significant impact on water quality. As stormwater flows over a construction site, it can pick up pollutants like sediment, debris, and chemicals and transport these to a nearby storm sewer system or directly to a river, lake, or coastal water. Polluted stormwater runoff can harm or kill fish and other wildlife. Sedimentation can destroy aquatic habitat, and high volumes of runoff can cause stream bank erosion. Debris can clog waterways and potentially reach the ocean where it can kill marine wildlife and impact habitat.

The NPDES stormwater program requires construction site operators engaged in clearing, grading, and excavating activities that disturb 1 acre or more, including smaller sites in a larger common plan of development or sale, to obtain coverage under an NPDES permit for their stormwater discharges. Most states are authorized to implement the Stormwater NPDES permitting program. EPA remains the permitting authority in a few states, territories, and on most land in Indian Country. In areas where EPA is the permitting authority, operators must meet the requirements of the EPA Construction General Permit (CGP).

WHAT CAN I FIND ON THIS WEB SITE?

To access the full list of NPDES stormwater information, use the navigation tool box on the right side of this page.

General Construction Highlights

EPA-Specific Information

  • EPA's Construction General Permit - EPA's permit for unauthorized states, most territories, and Indian Country that outlines a set of provisions construction operators must follow to comply with the requirements of the NPDES stormwater regulations.
  • Electronic Notice of Intent (eNOI) System - Allows operators to quickly apply for permit coverage under EPA's CGP.
  • Search, Sort, and View 2012 CGP NOIs and LEWs - Searchable database of Notices of Intent (NOIs) for construction projects covered under EPA's 2012 CGP and projects covered under the LEW waiver on or after September 10, 2013 in areas where EPA is the NPDES permitting authority.
  • Search, Sort, and View 2008 CGP NOIs and LEWs - Searchable database of Notices of Intent (NOIs) for construction projects covered under EPA's expired 2008 CGP and projects covered under the LEW waiver before September 10, 2013 in areas where EPA is the NPDES permitting authority.

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