Industrial Stormwater | Region 10 | US EPA

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Industrial Stormwater


For general questions about the Multi-Sector Stormwater General Permit, contact:

To report compliance problems, call EPA Region 10’s 24-hour reporting line at 206-553-1846 and leave a description of the problem, your contact information, and your MSGP tracking number.

Multi-Sector General Permit (MSGP) for Industrial Stormwater

This information applies to:

  • facilities in Idaho
  • facilities on Indian Country lands in Idaho, Oregon, and Washington
  • federal facilities in Washington
  • the Metlakatla Reservation and Denali National Park in Alaska

If your facility is not within one of the categories listed above, contact your state's stormwater program: Alaska | Oregon | Washington

Get started

  1. Do I need a permit?
  2. How do I get a permit?
  3. I have a permit, what do I do now?

Do I need a permit?

Use this chart to help you decide whether you need to apply for coverage under the MSGP:
Industrial Stormwater Decision Chart (PDF) (1 pg, 9K)

Other Guidance

What if everything we do is indoors?
You may submit a No Exposure Certification if all of your industrial materials and activities are protected by a storm resistant shelter to prevent exposure to rain, snow, snowmelt, and/or runoff. Read Appendix K of the MSGP: No Exposure Certification (PDF) (4 pp, 152K) to determine if you're eligible for exclusion from stormwater permitting.

If you're eligible, you can file your No Exposure Certification online.

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How do I get a permit?

2008 Multi-Sector General Permit (MSGP) Expiration Notice

The 2008 Multi-Sector General Permit (PDF) (247 pp, 4.5MB) for industrial storm water has expired. Coverage for existing permittees is administratively extended. Until the new permit is reissued, coverage for new facilities is unavailable. New industrial facilities in Idaho or on tribal lands in Alaska, Washington, or Oregon that wish to discharge industrial storm water after September 29, 2013 should determine if they:

  1. meet the 2008 MSGP eligibility criteria; if so,
  2. file the Notice of Intent for coverage (PDF) (7 pp, 714K) with EPA Region 10: Attention: MSGP Coordinator, U.S. EPA Region 10, OWW-191, 1200 Sixth Avenue, Suite 900, Seattle, WA 98101; and
  3. comply with all the requirements of the 2008 MSGP.

More information is available in our memorandum "No Action Assurance for the NPDES Stormwater Multi-Sector General Permit for Industrial Activities" (PDF) (11 pp, 730K).

  1. Read the Multi-Sector General Permit (PDF) (247 pp, 4.5MB). A Technical Fact Sheet (PDF) (154 pp, 1.2MB) is also available.
  2. Prepare a Stormwater Pollution Prevention Plan (see guidance below)
  3. Complete the endangered species determination
  4. Complete the historic properties determination
  5. Submit your Notice of Intent (NOI) online. Electronic submittal is preferred, but you can also submit a paper copy to the address listed in Appendix G: NOI for Industrial Stormwater Discharges (NPDES Form 3510-6) (PDF) (7 pp, 1.2MB).
  6. Wait for confirmation from EPA that your facility is covered (typically within 30 days).
Other Guidance

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I have a permit, what do I do now?

Check for special permit conditions

    If your facility is located in the following areas, be sure to check Part 9.10 of the MSGP for details about additional permit conditions:

    • State of Idaho (except in Indian Country) (see Part 9.10.3)
    • Confederated Tribes of the Umatilla Indian Reservation (see part
    • Lummi Nation (see part
    • Puyallup Tribe of Indians (see part
Report compliance problems

    Call EPA Region 10’s 24-hour reporting line at 206-553-1846 and leave a description of the problem, your contact information, and your MSGP tracking number.

Reporting forms
  • MSGP Documentation Template (Word File) (21 pp, 332K) - Use these sample templates and forms to keep records of your monitoring, inspection, maintenance, visual evaluation, and corrective action activities.
  • MSGP Industrial Discharge Monitoring Report (MDMR) Form (PDF) (4 pp, 441K) - If you cannot access the EPA's online eNOI reporting system, you can use this fillable PDF to submit your analytical monitoring results to EPA. You may also use this form as a checklist for the information you will need when submitting a MDMR electronically via eNOI.
  • Annual Reporting Form (PDF) (6 pp, 484K) - Use this form to submit your annual reports to EPA that summarize your comprehensive site inspection and corrective actions taken during the year.
Industry-specific compliance information
Other guidance

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