City of Tacoma, WA - Comprehensive Wastewater Treatment. Parametrix has been working with the City of Tacoma on wastewater treatment processes for over 15 years, including WWTP expansion & collection, hydraulic assessments, mixing zone studies, and physical-chemical biotower processes.

Parametrix is helping clients with both implementing and pilot testing micro-filtration using membranes - including the first major installation of the Kubota Membrane in North America.

City of Auburn, WA - Port of Seattle Master Plan Update. As part of the Third Runway Expansion and Master Plan Update, Parametrix designed and conducted enhancement and monitoring of a two-mile reach on a third order urban stream. Parametrix is also providing on-call stormwater services, Section 404/401 permitting, and wetland mitigation on a 69-acre site in Auburn.