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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 General Permit (NPDES) storm water permits for medium (serving between 100,000 and 250,000 people)
and large (serving 250,000 people) municipalities. Most of these permits are issued to a group of co-permittees encompassing an entire metropolitan area.
These permits are reissued as the permits expire.
Storm Water - Phase I MS4 Municipal Program
SACRAMENTO OFFICE
- East Contra Costa County MS4 Permit
- Sacramento County MS4 Permit
County of Sacramento and Cities of Citrus Heights, Elk Grove, Folsom, Galt, and Sacramento Stormwater Discharges From Municipal Separate Storm Sewer Systems
- Resolution No. R5-2010-0017, Approval of the Storm Water Improvement Plan, Adopted on 29 January 2010, 15 KB, PDF (PDF info)
- Stormwater Quality Improvement Plan, Adopted on 29 January 2010, 265 MB* (NOTE: THIS FILE IS VERY LARGE AND MAY TAKE A LONG TIME TO DOWNLOAD), PDF (PDF info)
- Order No. R5-2008-0142, Waste Discharge Requirements/Monitoring & Reporting Program/NPDES Permit No. CAS082597, Adopted on 11 September 2008, 1.6 MB*, PDF (PDF info)
- Resolution No. R5-2004-0140, Approving Storm Water Quality Improvement Plan, Adopted on 15 October 2004, 65 KB, PDF (PDF info)
- Order No. R5-2002-0206, Waste Discharge Requirements/Monitoring & Reporting Program/NPDES Permit No. CAS082597, Adopted on 6 December 2002, 778 KB, PDF (PDF info)
Sacramento Stormwater Quality Partnership – Stormwater Quality Design Manual for the Sacramento and South Placer Regions http://www.sacramentostormwater.org/SSQP/development.asp.
- City of Stockton/San Joaquin County MS4 Permit
City of Stockton and County of San Joaquin Storm Water Discharges from Municipal Separate Storm Sewer System
- Order No. R5-2009-0105, Approval of the City of Stockton and County of San Joaquin Storm Water Management Plans for The Municipal Separate Storm Sewer System (MS4) Permit, San Joaquin County, Resolution No. R5-2007-0173, Adopted on 8 October 2009, 15 KB, PDF (PDF info)
- Order No. R5-2007-0173, Waste Discharge Requirements/Monitoring & Reporting Program/NPDES Permit CAS083470, Adopted on 6 December 2007, 1.05 MB*, PDF (PDF info)
- Resolution No. R5-2004-0139, Approval of the Storm Water Management Plans, Adopted on 15 October 2004, 66 KB, PDF (PDF info)
- Order No. R5-2003-0133, Amended Waste Discharge Requirements/Monitoring & Reporting Program/NPDES Permit CAS083470, Adopted on 5 September 2003, Rescinded by R5-2007-0173, 16 KB, PDF (PDF info)
- Order No. R5-2002-0181, Waste Discharge Requirements/Monitoring & Reporting Program/NPDES Permit CAS083470, Adopted on 18 October 2002, Amended by R5-2003-0133, Rescinded by R5-2007-0173, 746 KB, PDF (PDF info)
- Port of Stockton MS4 Permit
Stockton Port District, Facility-Wide Storm Water Discharges From Municipal Separate Storm Sewer System and Non-Storm Water Discharges From the Port of Stockton
- Order No. R5-2011-0005, Waste Discharge Requirements/Reporting and Monitoring Program, NPDES Permit No. CAS0084077, Adopted on 3 February 2011, 3.27 MB*, PDF (PDF info)
- Order No. R5-2004-0136, Waste Discharge Requirements/Reporting and Monitoring Program, NPDES Permit No. CAS0084077, Adopted on 15 October 2004, 382 KB, PDF (PDF info)
- City of Modesto MS4 Permit
City of Modesto Storm Water Discharges from Municipal Separate Sewer System
- Resolution No. R5-2009-0119, Approval of the Storm Water Management Plans, Adopted on 10 December 2009, 15 KB, PDF (PDF info)
- City of Modesto Municipal Stormwater Program, Stormwater Management Plan, Adopted on 10 December 2009, 6.5 MB*, PDF (PDF info)
- Order No. R5-2008-0092, Waste Discharge Requirements/Monitoring & Reporting Program/NPDES Permit No. CAS083526, Adopted on 12 June 2008, 1.5 MB*, PDF (PDF info)
- Order No. R5-2003-0132, Amended Waste Discharge Requirements, Adopted on 5 September 2003, 14 KB, PDF (PDF info)
- Order No. R5-2002-0182, Waste Discharge Requirements/Monitoring & Reporting Program/NPDES Permit No. CAS083526, Adopted on 18 October 2002, 86 KB, PDF (PDF info)
Applicable General Permit
- 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, Urban Storm Water Discharges Order No. 5-00-148, Waste Discharge Requirements/Monitoring & Reporting Program, NPDES Permit No. CA0083500, Adopted on 16 March 2001, 82 KB, PDF (PDF info)
- City of Bakersfield MS4 Permit
County of Kern and The City of Bakersfield for Urban Storm Water Discharges Order No. 5-00-130, Waste Discharge Requirements/Monitoring & Reporting Program, NPDES Permit No. CA00883399, Adopted on 14 June 2001, 136 KB, PDF (PDF info)
Storm Water – Phase II Small MS4 Municipal Program
As part of Phase II, the State Water Resources Control Board adopted 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, including non-traditional Small MS4s, which are governmental facilities such as military bases, public campuses, and prison and hospital complexes
The MS4 permits require the discharger to develop and implement a Storm Water Management Plan/Program with the goal of reducing the discharge of pollutants to the maximum extent practicable (MEP). MEP is the performance standard specified in Section 402(p) of the Clean Water Act. The management programs specify what best management practices (BMPs) will be used to address certain program areas. The program areas include public education and outreach; illicit discharge detection and elimination; construction and post-construction; and good housekeeping for municipal operations. In general, medium and large municipalities are required to conduct chemical monitoring, though small municipalities are not.
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