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Storm Water - MS4 Municipal Program

Storm Water - MS4 Municipal Program

Municipal Permits
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Phase I MS4 Municipal Program

Phase II Small MS4 Municipal Program

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Disclaimer and Notes:

The NPDES Permit pdf documents might be formatted differently than the hard copies. We are in the process of reformating the permit pdf files to match the format on the hard copies.

Most forms in Adobe Acrobat may be filled out electronically.

If you do not have adobe acrobat reader, it can be downloaded for free. Click here for link to the Adobe site.

http://www.adobe.com

The Municipal Storm Water Permitting Program regulates storm water discharges from municipal separate storm sewer systems (MS4s). MS4 permits were issued in two phases.

Under Phase I, which started in 1990, the Regional Water Quality Control Boards have adopted National Pollutant Discharge Elimination System (NPDES) storm water permits for medium (serving between 100,000 and 250,000 people) and large (serving 250,000 or more people) municipalities. Most of these permits are issued to a group of Co-permittees encompassing an entire metropolitan area.

On April 30, 2003, as part of Phase II, the State Water Resources Control Board issued a General Permit for the Discharge of Storm Water from Small MS4s (WQ Order No. 2003-0005-DWQ) to provide permit coverage for smaller municipalities (population less than 100,000), including non-traditional Small MS4s, which are facilities such as military bases, public campuses, prisons and hospital complexes. The Phase II Small MS4 General Permit covers Phase II Permittees statewide. On February 5, 2013, the Phase II Small MS4 General Permit was renewed and became effective on July 1, 2013.

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Subscribe on-line to our Storm Water Region-wide Permit, electronic mailing list.

General Inquiries can be sent to: RB5_MS4_stormwater@waterboards.ca.gov.

Storm Water - Phase I MS4 Municipal Program

SACRAMENTO OFFICE

FRESNO OFFICE

  • Fresno MS4 Permit, Fresno County
    Fresno Metropolitan Flood Control District, City of Fresno, City of Clovis, County of Fresno, and California State University of Fresno for Storm Water Discharges from Municipal Storm Sewer System
    • Order No. R5-2013-0080, Waste Discharge Requirements/Monitoring & Reporting Program, NPDES Permit No. CA00883500, Adopted on 31 May 2013, 1.06 MB*, PDF (PDF info)
    • Order No. 5-01-048, Waste Discharge Requirements/Monitoring & Reporting Program, NPDES Permit No. CA00883500, Adopted on 16 March 2001, 82 KB, PDF (PDF info)


  • Bakersfield/Kern County MS4 Permit
    City of Bakersfield and County of Kern Storm Water Discharges from Municipal Storm Sewer System
    • Order No. R5-2013-0153, Waste Discharge Requirements/Monitoring & Reporting Program, NPDES Permit No. CA00883399, Adopted on 6 December 2013, 1.24 MB*, PDF (PDF info)
    • Order No. 5-01-130, Waste Discharge Requirements/Monitoring & Reporting Program, NPDES Permit No. CA00883399, Adopted on 14 June 2001, 136 KB, PDF (PDF info)

Phase II Small MS4 Program

Other Resources

Questions or Comments about MS4 Permits or the MS4 Program?

You may submit your MS4 questions or comments to Program Staff.


--Web page updated 03/28/2014