Comprehensive Clackamas County NPDES MS4 Stormwater Monitoring Plan

The City of Oregon City worked with 9 other Clackamas County jurisdictions to update the Comprehensive Clackamas County Stormwater Monitoring Plan (CCCSMP). The Plan documents environmental monitoring activities that the City of Oregon City will conduct to address requirements of Oregon City's Phase I National Pollutant Discharge Elimination System (NPDES) stormwater permit. The Phase I NPDES stormwater permit is in place to protect and improve receiving water quality throughout Clackamas County. The Plan describes the monitoring objectives, locations, pollutant parameters, and monitoring procedures and protocols. The updated 2023 plan is available under supporting documents.