Municipal Stormwater

Sophia Grant-Branklyn

Contact Sophia Grant-Branklyn

[email protected]

Contacts: Mildred Granderson ([email protected]), Lisa Perrett ([email protected]) and Miranda Knepp ([email protected])

Municipal stormwater discharges are regulated through the NPDES Municipal Separate Storm Sewer Systems (MS4) Permits. GA EPD has issued Phase I permit requirements that apply to Large and Medium MS4s and Phase II permit requirements that apply to Small MS4s. Permit information and resources are available below.

MS4 Draft Permits

Phase I Medium MS4 Permits Stakeholder Draft and Public Meetings – October 14, 2021 Public Notice

The Georgia Environmental Protection Division (EPD) is considering the reissuance of the Phase I Medium MS4 permits, authorizing stormwater discharges from municipal separate storm sewer systems (MS4s) to the waters of the State of Georgia.  The stakeholder draft is available here .  A virtual stakeholder meeting will be held on November 30, 2021.  Please refer to the Public Notice for meeting details.  Comments received by close of business on Friday December 10, 2021 will be considered in the formulation of the draft permit.

Phase I Medium MS4 Second Stakeholder Meeting – December 8, 2021 Public Notice

The Environmental Protection Division (EPD) will host a second stakeholder meeting on January 5, 2022 to discuss the proposed Phase I Medium MS4 stakeholder draft.  Please refer to the public notice for details. 

GDOT MS4 Draft Permit – September 16, 2021 Public Notice

The Georgia Environmental Protection Division (EPD) is considering the reissuance of General NPDES Permit No. GAR041000 authorizing stormwater discharges from the Georgia Department of Transportation (GDOT) municipal separate storm sewer system (MS4) to the waters of the State of Georgia.  The draft permit and factsheet are available here.  A public meeting and hearing has been scheduled for November 1, 2021.  Please refer to the Public Notice for additional information.  Comments received by close of business on Friday November 12, 2021 will be considered in the formulation of final determination. 

MS4 Phase I and II

• MS4 Submittal Requirements [Sept. 2014]

Phase I Large MS4

The 2019 Phase I Large MS4 NPDES Permits Nos. GAS000XXX for Storm Water Discharges from Municipal Separate Storm Sewer Systems (MS4) were reissued on May 13, 2019 with an effective date of June 11, 2019. The permits are posted on the Watershed Protection Branch Permit and Public Comments Clearinghouse. Additional permit information and resources are available below.

• Phase I Large Municipal Separate Storm Sewer System MS4 NPDES Permit No. GAS000XXX [May. 13, 2019] Template
• Phase I Large MS4 Public Comments and Responses
• Phase I Large Stormwater Management Program Template  
• Phase I Large Annual Report Form [February 2021]
• List of MS4 Phase I Permittees [Revised June 2017]

Phase I Medium MS4

The 2017 Phase I Medium MS4 NPDES Permits Nos. GAS000XXX for Storm Water Discharges from Municipal Separate Storm Sewer Systems (MS4) were reissued on March 17, 2017 with an effective date of April 12, 2017. The permits are posted on the Watershed Protection Branch Permit and Public Comments Clearinghouse. Additional permit information and resources are available below. 

• Public Comments and Response 
• PHASE I MEDIUM AND LARGE STORM WATER MANAGEMENT PROGRAM GUIDANCE [July 2014]
• Phase I Medium Annual Report Form [February 2021]

General NPDES Permit No. GAG610000 for Phase II MS4                                                                                                                                       

The 2017 General NPDES Stormwater Permit No. GAG610000 for Phase II Storm Water Discharges from Municipal Separate Storm Sewer Systems (MS4) was reissued on November 15, 2017 with an effective date of December 6, 2017. The general permit is available below and on the Watershed Protection Branch Permit and Public Comments Clearinghouse. Additional permit information and resources are available below. 

• 2017 General NPDES Stormwater Permit No. GAG610000 for Phase II MS4
  • ​ ​Public Comment and Response

• Georgia Notice of Intent (Phase II Municipal) Word Format [Revised August 2017]
• STORM WATER MANAGEMENT PROGRAM GUIDANCE - Phase II MS4 Storm Water Management Program Preparation [February 2013]
• STORM WATER MANAGEMENT PROGRAM TEMPLATE - Phase II MS4 Storm Water Management Program template for Existing MS4s [June 2013]
• STORM WATER MANAGEMENT PROGRAM TEMPLATE - Phase II MS4 Storm Water Management Program Template for New MS4s [April 2014] *New*
• ANNUAL REPORT FORM - Phase II Municipal Separate Storm Sewer System (MS4) (MS Word) [Revised December 2021]
• Additional BMP Reporting Form - Phase II Municipal Separate Storm Sewer System (MS4)  [December 2016]
• List of Designated MS4 Phase II Permittees [Revised January 2020]

Other Phase II MS4 Permits

*Please visit the Watershed Protection Branch Permit and Public Comments Clearinghouse to view public comments.

• 2019 General NPDES Permit GAG480000 for small Municipal Separate Storm Sewer Systems (MS4s) at Military Facilities*        
• NPDES GENERAL PERMIT For Discharges From Georgia Department of Transportation Municipal Separate Storm Sewer System (MS4) To The Waters Of The State Of Georgia - GAR041000 [Dec. 2016]*

Related Links

• Georgia Stormwater Management Manual (GSMM) (2016)
• Coastal Stormwater Supplement (August 2009) to GSMM