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Friday May 6th
NPDES Documents Page
City of Oregon City

Oregon City's Stormwater Discharge Permit was reissued on March 16, 2012.  Oregon City is one of 13 co-permittees that comprise the Clackamas County Group.  You can view the new permit here:

Oregon City's Stormwater Management Plan (SWMP) has been revised to reflect new permit requirements.  You can view it by clicking on the attachment below.

The Oregon Department of Environmental Quality (DEQ) regulates stormwater runoff from the City of Oregon City through the National Pollutant Discharge Elimination System (NPDES) Municipal Separate Storm Sewer System Discharge Permit (MS4 Permit) issued to Clackamas County and its co-permittees (Oregon City, Lake Oswego, Gladstone, West Linn, Milwaukie, Wilsonville, Happy Valley, Johnson City, Rivergrove, the Oak Lodge Sanitary District,  Clackamas County Service District No. 1, and the Surface Water Management Agency of Clackamas County).

Additionally, DEQ has set Total Maximum Daily Loads (TMDLs) for water bodies located in the Willamette River Basin.  Currently there are three parameters of concern - temperature, bacteria, and mercury.   A TMDL Implementation Plan is required to address these parameters.  Oregon City's SWMP serves as the implementation plan for bacteria and mercury, and our TMDL Implementation Plan addresses temperature.

Each co-permittee is required to submit an annual report to DEQ summarizing accomplishments and implementation of the individual SWMPs.  TMDL Plan activities are reported in an annual TMDL Progress Report.  Please visit the NPDES Annual Reports Page to view these Reports.