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EPA's Region 6 Office

Serving: Arkansas, Louisiana, New Mexico, Oklahoma, Texas, and 66 Tribal Nations

Storm Water Discharges Associated with Construction Activities

NOTE: Several links take you to other sites, you may have to back up or close the new window to return to this page. Many of the guidance documents, permits, etc. available on-line are in PDF format and you will need the free Adobe Reader to view some of the files on this page. See EPA's PDF page to learn more.


NEW: One Year Extension to Construction General Permit Proposed: To allow time to prepare a new five year general permit incorporating the recently issued Construction and Development Effluent Limitation Guidelines, EPA has proposed to extend the expiration of the 2008 Construction General Permit from July 1, 2010, to July 1, 2011.

 • NEW: On November 23, 2009, EPA issued new Construction & Development (C&D) effluent guidelines that would affect all future construction general permits

 • Developing Your Stormwater Pollution Prevention Plan: A Guide for Construction Sites This guidance manual is intended as a helpful reference for construction site operators who must prepare a SWPPP in order to obtain NPDES permit coverage for their stormwater discharges. It describes the SWPPP development process and provides helpful guidance and tips for developing and implementing an effective SWPPP. In addition, the guide provides customizable SWPPP templates and a sample inspection report, in Microsoft Word format. This Guide may be used by construction site operators anywhere in the U.S. The SWPPP Template and Inspection form should be customized to meet the requirements in the applicable State Construction General Permit.

NEW: 9th Circuit Court Ruling on NPDES Regulations for Construction Stormwater Discharges Associated with Oil and Gas Exploration, Production, Processing, or Treatment Operations, or Transmission Facilities   

eNOI System Available: You may now enter construction general permit NOIs online via the eNOI system. You may also search the NOI database online.


Under Phase I of the Storm Water Program, permits for discharge of storm water from construction activities that are part of a common plan of development or sale disturbing five or more acres have been required since October 1, 1992.  Phase II of the storm water program requires permits for "small" construction activities in the 1-5 acre range starting March 10, 2003.  There are some waivers available and a fact sheet and help with the "Low Rainfall Erosivity" ("R" Factor) waiver is available on-line.

The EPA-issued general permit for storm water associated with construction activities (Construction General Permit or CGP) is available for construction projects in New Mexico; oil & gas and agriculture point source (e.g., Concentrated Animal Feeding Operations-CAFOs, etc.) related construction projects in Oklahoma; oil & gas related construction projects in Texas; and construction projects on Indian Country lands in Louisiana, New Mexico (except Navajo and Ute Mountain Ute reservations -covered by the permits for EPA Regions 8 & 10). The requirements of the 2008 CGP are similar to the previous 2003 permits and will authorize the discharge of pollutants in storm water runoff associated with construction activities in accordance with the terms and conditions described therein. The CGP requires construction operators to submit a Notice of Intent (NOI) to be covered under the CGP. The NOI includes basic information about the operator and the project site. Prior to submission of the NOI, operators must develop a Storm Water Pollution Prevention Plan (SWPPP). The SWPPP includes a description of the Best Management Practices (BMPs) that will be used to reduce pollutants in the storm water discharges. The CGP also requires operators to conduct regular site inspections, comply with Endangered Species Act requirements, and submit a Notice of Termination when construction is complete.

NOTE: The CGP allows oil and gas construction projects to obtain coverage IF NEEDED. Click here for the status of the current exemption for uncontaminated stormwater runoff from oil and gas exploration, production, etc. construction projects.(return to top)


State-issued Construction General Permits

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To file an NOI or NOT electronically, visit the eNOI web site. To file a hard copy NOI or NOT, the current addresses for the NOI Processing Center are:


Storm Water Notice of [Intent/Termination] (4203M)
US EPA - Ariel Rios Building
1200 Pennsylvania Ave., NW
Washington, DC 20460

However, the physical address is different in case you send the package via an express messaging service:


Storm Water Notice of [Intent/Termination]
US EPA - ICC Building, Room 7329
1201 Constitution Ave., NW
Washington, DC 20004

If you need to check on the status of your NOI/NOT or need a copy of your permit coverage confirmation letter, please contact the NOI Processing Center at: 1-866-352-7755. You can also check on your NOI and print out a copy of the NOI information online at the eNOI database search web site.

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Region 6 NPDES Storm Water Program Home Page

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