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Surface Water Management (SWM)

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Surface Water Management (SWM) provides water quality protection for the community by implementing programs, which reduce pollution in our rivers, streams and wetlands caused by urban stormwater runoff.

Stormwater runoff is the most significant source of water pollution in our state. It washes pollutants into storm drains and drainage ditches, carrying silt, oil, chemicals, trash and pesticides to the nearest creek, stream or wetland. The polluted runoff can harm fish, aquatic life, and threaten our drinking water.

A Creek Runs Through It

Through watershed protection and planning, Water Environment Services (WES) is taking a long-term approach to protecting the health of our water resources.

What does the SWM program do?

Why do I pay a SWM fee?

Each resident of the community contributes to the cost of the program because we use the buildings, streets, parking lots and sidewalks that add to the need for a surface water management program. Developers also pay for the cost of building, the drainage systems and water quality facilities serving their development.

MS4 Permit Stormwater Management Plans

MS4 Permit Renewal Submittal

2013–2014 MS4 Permit Annual Report

*Previous years available on request


Frequently Asked Questions

Plan Review Charges & Fees Schedule

Rules & Specifications

TMDL Implementation Plan Documents

Surface Water Management Citizen Advisory Committees

The Commissioners and WES work with the North Clackamas and Lower Tualatin Surface Water Management Citizens’ Advisory Committees to develop and implement programs and standards that relate to surface water and storm water management in Clackamas County Service District No. 1 (CCSD1) and the Surface Water Management Agency of Clackamas County (SWMACC), respectively.

CCSD No. 1 serves the communities of Boring, Clackamas, Happy Valley, Hoodland, Johnson City, Milwaukie and Rivergrove. SWMACC serves the Lower Tualatin area of the County. Interested residents and representatives of businesses, associations, non-profit groups and other organizations that are based in CCSD No. 1 and SWMACC are encouraged to apply. All meetings are open to the public.


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Water Environment Services

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Water Environment Services
150 Beavercreek Rd. Oregon City, OR 97045

(503) 742-4567

Monday - Thursday 7:30 am - 5:30 pm