what we do


Engineering innovative wastewater treatment solutions

Increasing population, aging infrastructure, and stricter regulations have put pressure on wastewater conveyance and treatment systems. Parametrix develops sustainable, cost-effective solutions. In addition to traditional approaches, we are experienced in designing systems for advanced membrane filtration, reclaimed water, enhanced nutrient systems, and biosolids management. From collection and conveyance to treatment and reuse, we are exploring new ways for our clients to improve their operations and meet today’s challenges.


  • Cowlitz Casino Development and Water Reclamation Plant  | Parametrix

    Cowlitz Casino Development and Water Reclamation Plant

  • Nisqually Wastewater System Improvements

    Nisqually Wastewater System Improvements

  • Parametrix Wastewater - Shelton Wastewater System Improvements, Shelton, Washington

    Shelton Wastewater System Improvements

  • Parametrix Wastewater - Bellevue Pump Station Upgrade, Bellevue, Washington

    Bellevue Pump Station Upgrade

  • Parametrix Wastewater - SE 83rd Pump Station, Portland, Oregon

    SE 83rd Pump Station

  • Parametrix Wastewater - Gorst Sewer Collection System, Bremerton, Washington

    Gorst Sewer Collection System


"...excellent project management throughout the project to keep the project on schedule and within budget... Your staff did an outstanding job of designing the facilities and managing the construction."

Steven Schuller, PE, former City of Duvall Director of Public Works