Water Quality Permits


DEQ currently regulates municipal stormwater discharges from 19 communities with populations less than 100,000 (Phase II) under Municipal Separate Storm Sewer System individual permits. Those individual permits expired in 2012. The number of regulated Phase II communities in Oregon has increased due to population growth. In 2012 seven new regulated communities were notified that they will be required to obtain coverage permit coverage.
DEQ has proposed to permit existing and future Phase II communities under a general permit, the MS4 Phase II Stormwater general permit.

MS4 Phase II permit development timeline

Week of Nov. 27, 2017 - Start of Public Notice
Dec.7, 2017 (afternoon) - Permit Implementation Workshop
Jan. 10, 2018 (morning) - Public Hearing

MS4 Phase II Implementation Workshop

Oregon DEQ will be hosting a MS4 Phase II Implementation Workshop related to the proposed MS4 Phase II General Permit on Dec. 7, 2017 at the DEQ Eugene Office.
Meeting Location:
DEQ Eugene Office
165 E 7th Avenue
Eugene, Oregon
541- 686-7838
​On July 1, 2016 DEQ posted a proposed MS4 Phase II general permit for public comment. DEQ hosted a Public Hearing associated with the permit on Aug. 3, 2017. The formal comment period ended Sept. 2, 2016.
​In July 2016 DEQ posted the draft MS4 Phase II general permit for public notice and received 250 separate comment documents or oral testimonies. Based on several requests received, DEQ hosted two facilitated listening sessions to further explore issues raised during the public process.

Dec. 6, 2016
Feb. 7, 2017
​DEQ convened an Advisory Committee associated with the development of a MS4 Phase II general permit. The committee helped identify issues, provide feedback on implementation timelines and regional issues.

Meeting 7: May 10, 2016 Meeting 6: Nov. 19, 2015 Meeting 5: Nov. 4, 2015 Meeting 4: Sept. 24, 2015 Meeting 3: July 9th, 2015
​Identified are the 19 Phase II communities, and the seven new communities that will require coverage.

City of Albany*   
City of Ashland   
City of Bend   
City of Corvallis   
City of Eagle Point*   
City of Gold Hill**   
City of Grants Pass*  
City of Jefferson **   
City of Keizer   
City of Medford   
City of Millersburg*   
City of Milton-Freewater**   
City of Philomath   
City of Rogue River*   
City of Springfield   
City of Tangent**   
City of Troutdale   
City of Turner
City of Wood Village   
Benton County

Josephine County*

Lane County
Linn County*
Marion County
Polk County
Umatilla County** 
Rogue Valley Sewer Services - RVSS  
RVSS - City of Central Point
RVSS - City of Phoenix
RVSS - City of Talent
RVSS - Jackson County
*New Urbanized Areas identified based on 2010 US Census data. Communities are automatically designated for coverage by EPA and notified by DEQ.
** New Urbanized Areas identified based on 2010 US Census data. Community applied for waiver of coverage and DEQ approved request.

​Stormwater runoff is generated when precipitation from rain and snowmelt flows over land or impervious surfaces and does not percolate into the ground. As runoff flows over land and impervious surfaces in urbanized areas (such as paved streets, parking lots and building rooftops), it can accumulate chemicals, nutrients, sediment or other pollutants in quantities that could adversely affect water quality. If stormwater runoff discharges from MS4s that serve these urbanized areas, and the runoff is untreated or allowed to accumulate pollutants, it may adversely affect local aquatic life and beneficial uses of water such as swimming, fishing and drinking water.

Public involvement

DEQ is not accepting comments, the opportunity to review and submit comments will begin the wrrk of Nov. 27, 2017. DEQ will post the proposed permit for public comment when available.
If you are interested in receiving updates about the Phase II General Permit development, please email your name, affiliation and email address.