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. 
The most recent report covers the period of time from July 1, 2014 through June 30, 2015 and is called the 2015 Annual Report. It is provided via a link to the right.

The 2014 Annual Report is also provided, along with three required assessment documents leading up to the City's permit renewal. Previous annual reports for years prior to 2014 are available upon request (see "Contact Us").
Permit Renewal
The City's current NPDES permit, scheduled to expire December 29, 2015, has been administratively extended by DEQ until it acts on a new permit. In December 2015, the City submitted a permit renewal application package, including a proposed updated Stormwater Management Plan and draft Monitoring Plan. The permit renewal submittal is provided via a link to the right.

Thank you for your interest in Eugene's Stormwater permit and Stormwater program.

Links to Related Documents

NPDES Permit 

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

Monitoring Plan 

Stormwater Monitoring Plan 
Appendix A-1 
Appendix A-2 
Appendix B 
Appendix C 



NPDES Reports      
2015 Annual Report
App. A - Water Quality Data
App. B - Water Quality Boxplots & Trends
App. C - Macroinvertebrate Study
App. D - NPDES MS4 Permit
App. E - Stormwater Management Plan
App. F - Legal Authority
App. G - Adaptive Management Tool
App. H - Public Review
2014 Annual Report         
Supplement to 2014 Report 
Hydromodification Assessment
Retrofit Plan              
WQ Data Related Documents  
Water Quality Data (2015) 
Readme file (for WQ Data) 

NPDES Permit Renewal 
Permit Renewal Package (Dec 2015)

Eugene's Stormwater Policies
Comprehensive Stormwater Management Plan 

TMDL Documents

Current TMDL Plan 
TMDL Year 7 Report (2015)
TMDL Year 6 Report       
TMDL Year 5 Report
TMDL Year 4 Report 
TMDL Year 3 Report 
TMDL Year 2 Report 
TMDL Year 1 Report