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EPA's Region 6 Office

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

Storm Water

The Water Enforcement Branch is responsible for reviewing compliance by Industrial Facilities (including construction sites) with the storm water regulations and the NPDES permitting program.


  • File your Notice of Intent (NOI) application for NPDES storm water permit coverage.
  • The eNOI database is only for NPDES applications where EPA is the NPDES permitting authority.
  • If you have questions about this database, you may contact our NOI Processing Center contractor, CTGI, at (866)352-7755.
  • View NOI's online to check on permitting status.

eNOI Processing Center

  • Call the NOI Processing Center Hotline Phone number (866) 352-7755 to inquire on the status of a Notice of Intent application or a Notice of Termination.
  • Please contact EPA directly if you have permitting or enforcement issues.

The NOI Processing Center mailing address is:

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

  • You are strongly encouraged to send Notice of Intent applications by certified mail.

Construction General Permit

No Exposure

  • Industrial activities (except construction) that do not have exposure to storm water, are exempted from the NPDES permitting if they:
  • Category 11 facilities [40 CFR 122.26(b)(14)(xi)] may remain exempted from the NPDES permitting authority. However, they are now required to submit the "No Exposure Certification" (PDF) form to the NPDES permitting authority.
  • Failure to either obtain an NPDES storm water permit or else submit a "No Exposure Certification" for category 11 facilities is a violation of the Clean Water Act effective February 7, 2000.
  • Please read the "No Exposure Certification" instructions very carefully to determine whether your facility is eligible. Additionally, you may want to utilize the guidance for No Exposure Certification (PDF) issued by the Office of Water in July 2000. An incorrect interpretation may subject facilities to civil penalties.

Multi-Sector General Permit

  • The Final Draft of the 2008 MSGP (PDF) (247 pp, 2.09MB) was announced on September 29, 2008, in the Federal Register.
  • This permit replaces the 2000 MSGP (PDF) (136 pp, 1.3MB), which expired on October 30, 2005.
  • The 2008 MSGP provides coverage for industrial facilities (PDF) Region 6's New Mexico industrial facilities, and in certain Indian Country lands, as well as at various Federal Facilities in other States (see Appendix C of the 2008 MSGP (PDF) (5 pp, 547K)), where EPA still remains the NPDES permit authority.
  • The 2008 MSGP specifies steps that facility operators must take prior to becoming eligible for permit coverage, including submitting a Notice of Intent (NOI), installing stormwater control measures to minimize pollutants in stormwater runoff, and developing a stormwater pollution prevention plan (SWPPP).
  • EPA has released a guidance on how to develop a SWPPP that meets the requirements of the 2008 MSGP.
  • View the general two-page fact sheet (PDF) (2 pp, 72K) summarizing the final 2008 MSGP.
  • EPA has hosted two webcast presentations which have been archived and can be viewed at the NPDES training webpage.

MS4 Permits

EPA Region 6 has issued our first small Municipal Separate Storm Sewer System general permit and it covers discharges in New Mexico and Indian Country lands in New Mexico and Oklahoma.

Oil and Gas

Final Rulemaking for Regulation of Oil and Gas construction Activities.


EPA's Office of Water maintains a Marina web page at http://www.epa.gov/OWOW/NPS/marinas/. It addresses NPDES compliance and other Federal Environmental laws effecting Marinas.


  • Arkansas has assumed the NPDES program.
  • Louisiana has assumed the NPDES program
  • New Mexico has not assumed the NPDES storm water program and EPA directly implements the NPDES program in New Mexico. However, New Mexico does have staff that handle storm water related issues for the State. The New Mexico Environment Department storm water contact is Mr. Richard Powell and his phone number is (505)827-2798.
  • Oklahoma has assumed the NPDES program
  • Texas has assumed the NPDES program

NPDES Non-Compliance contact information

If you encounter any problems accessing the web address or email, please contact Ms. Rashida Bowlin at (214) 665-3112.

Public Notice

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