Surface Water Health

Watershed Health Monitoring Data


Pierce County has a surface water quality monitoring program to assess watershed health. A watershed is an area of land where all the water that is under it or on it drains to the same place. The four major watersheds in Pierce County that drain to Puget Sound are: Clarks/Cover; Key Peninsula-Gig Harbor; Nisqually and Puyallup. Pierce County regularly monitors water quality in all four watersheds. Want to know where the water from your neighborhood goes? Check out Where Does Your Water Go.
  1. Ambient Monitoring
  2. NPDES
  3. Shellfish Protection
  4. Water Level & Weather Data
  5. Additional Resources

Pierce County's Surface Water Management (SWM) conducts monthly water quality monitoring at over 50 streams. The data is used to monitor water quality trends over time; more information can be found here. SWM also collects stream insects (macroinvinterbrates) from over 30 streams. The types of insects found in a stream is a way to determine the overall stream health. For more information, click here.

Web-Based Tool to Monitor Stream Health Data

Access stream and shellfish monitoring data we collect and analyze.

How Streams Get Their Grades

We issue an annual Surface Water Health Report Card on the health of surface water quality in each major watershed. The report card grades a number of streams on a scale of "A" to "F" based on a combination of WQI scores and BIBI scores. These factors combined provide a realistic overall understanding of stream health, and help direct our clean up efforts. The report card also includes an assessment of some lakes in the county. 

View most recent report card | View all report cards

Additional Resources

Contact Us
Send a message arrow
Carla Vincent
Interim Water Quality Manager
Phone: (253) 798-2467
Fax: (253) 798-4225
Monday-Friday
7:30 a.m.–4:00 p.m.

Mailing Address:
2702 S 42nd St, Ste 201
Tacoma, WA 98409-7322