Municipal Stormwater

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

The Georgia Environmental Protection Division (EPD), Watershed Protection Branch, is conducting a stakeholder meeting to discuss the reissuance of General NPDES Permit No. GAG610000, authorizing stormwater discharges from Phase II Small MS4s to the waters of the State of Georgia. The stakeholder draft permit documents can be downloaded at the following links:

Draft and

Summary of Changes . A Stakeholder meeting has been scheduled for April 19, 2022. Please refer to the

Public Notice for addition meeting information. Comments received by close of business April 26, 2022 will be considered in the formulation of the official draft permit.

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 Medium MS4
The Phase I Medium MS4 NPDES Permits were reissued on April 12, 2022. The permits are posted below. The permits and comments are posted on the Watershed Protection Branch Permit and Public Comments Clearinghouse. Additional permit information and resources are available below.
Phase II MS4 – GAG610000
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
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. 2021]*
Related Links
- Georgia Stormwater Management Manual (GSMM) (2016)
- Coastal Stormwater Supplement (August 2009) to GSMM