NPDES Municipal Stormwater Permit

NPDES Municipal Stormwater Permit

The City of Eugene holds a permit under the federal Clean Water Act for the stormwater discharged from the public Stormwater system into the Willamette River and other local waterways, including Amazon Creek. The permit, formally called the Phase I National Pollutant Discharge Elimination System (NPDES) Municipal Separate Storm Sewer System (MS4) permit, requires that the City reduce the discharge of pollutants from the municipal system to the maximum extent practicable. The permit requires implementation of a set of best management practices comprising the City's Stormwater Management Plan (SWMP), water quality monitoring, and regular reporting. The  Department of Environmental Quality (DEQ) administers federal NPDES permits for municipalities and other local agencies in Oregon. 

Annual Reporting

Each year, the City prepares a Stormwater Annual Report in accordance with the requirements of its NPDES permit. The Annual Report provides information on the progress of stormwater program activities during the reporting period including implementation of best management practices and water quality trends. Recent years' reports (2014 - 2018) are provided via links to the right, along with other stormwater permit program related documents and information.
Public Comments
While the formal review period for the 2018 Annual Report ended on November 28, the City of Eugene welcomes public comment on the stormwater program and annual reports anytime. Comments received after November 28 will be taken into consideration for potential future modifications. Thank you for your interest.

Send written comments to: NPDES Permit, Eugene Public Works, 99 E. Broadway, Suite 400, Eugene, OR 97401. Send e-mail comments to:


Links to Related Documents

NPDES Permit 

Permit Evaluation Report 
Stormwater Management Plan - Set of Best Management Practices

Monitoring Plan 

Stormwater Monitoring Plan (appendices upon request)

Annual Reports
Final 2018 ReportFinal 2017 Report
Final 2016 Report  
Final 2015 Report
Final 2014 Report

Supplement to 2014 Report            

Other Reports 
Hydromodification Assessment
Retrofit Plan              
Water Quality Data   
Water Quality Data (2017) 
Readme file (for WQ Data) 

NPDES Permit Renewal 
Renewal Package (12/15) 

Stormwater Policies
Comprehensive Stormwater Management Plan 
TMDL Documents
Current TMDL Plan 
TMDL Year 9 ReportTMDL Year 8 Report
TMDL Year 7 Report 
TMDL Year 6 Report       
TMDL Year 5 Report
TMDL Year 4 Report 
TMDL Year 3 Report 
TMDL Year 2 Report 
TMDL Year 1 Report