Healthy Watershed

Strategic Watershed Assessment & Planning

We apply scientific knowledge and innovation to improve watershed health for community benefit.

Baker Creek

Tualatin Basin Water Supply and Flow Restoration

Clean Water Services, local cities and water providers are working to secure a long-term water supply for municipal, industrial, agricultural, and environmental needs. CWS staff partners with water resource managers to explore opportunities to improve watershed health and enhance stream flows. In addition to our timed releases with the Hagg Lake facility, we also work with farmers along Gales and McKay Creeks to enhance stream flows and support watershed health.

Regional Stream and Wetland Enhancements

We’re working on a variety of projects, including aquatic habitat enhancement, riparian planting, wetland restoration and treatment facility upgrades across urban and rural areas of the Tualatin River Watershed.

  • Enhancing urban streams and wetlands is an investment that pays dividends in many ways.
  • Clean Water Services partners with the agricultural community to meet regulatory obligations and mutual goals for watershed health. Learn about Enhanced CREP and VEGBAC programs for rural landowners.

Water Quality Credit Trading Annual Report (2021)

A watershed based NPDES permit allows Clean Water Services to offset thermal loads from the Rock Creek, Durham, and Forest Grove treatment facilities by implementing a water quality credit trading program for temperature. The 2021 Water Quality Credit Annual Report (PDF) offers information on temperature-related activities during the period of January 1 through December 31, 2021.


Sanitary Sewer Master Plan

Part of Clean Water Services’ responsibilities include planning facility and collection system improvements. The intention of the Sanitary Sewer Master Plan is to identify these improvements in order to provide adequate capacity for both current and future needs. 

In April 2022, the CWS Board of Directors adopted the East Basin Master Plan, a comprehensive examination of the 20-year infrastructure needs of the Durham Water Resource Recovery Facility and the collection system that serves more than 200,000 residents of Sherwood, Tigard, Tualatin, King City, Durham, Metzger and portions of Beaverton, Portland and Lake Oswego. The plan includes recommendations to prepare for challenges such as climate adaptation and seismic resilience, while planning for necessary improvements to the East Basin collection and treatment systems assets.

CWS is working on a West Basin Master Plan to assess the needs of the Rock Creek, Forest Grove, and Hillsboro water resource recovery facilities. CWS last did an extensive review of the treatment and conveyance systems in this area in 2014.