Water Treatment Process Engineer Salary in Seattle, WA.
Updated on: Dec 17, 2025
How much does a Water Treatment Process Engineer make in Seattle, WA?
The average Water Treatment Process Engineer in Seattle, WA makes $202,288,
51% above the national average Water Treatment Process Engineer salary of $133,743.
This pay is 14% greater than the combined average salaries of other metroes San Jose, CA, San Francisco, CA, and Tampa, FL.
Read more
Water Treatment Process Engineer Salary Average
Compare salary averages by location
Explore and compare salaries based on different locations to gain valuable insights and make informed decisions.

See salaries for related job titles
*Data is estimated and depends on the generous anonymous contributions of individuals