Building for a Pure Water Future

Conco West, Inc. is a trusted leader in the construction of water treatment facilities throughout California’s Central Valley and Bay Area. With more than 45 water treatment plants successfully delivered as the general contractor, we bring proven expertise, reliability, and innovation to every project.

We specialize in the installation of advanced treatment technologies, including:

•    Granular Activated Carbon (GAC) Systems
•    Iron-Manganese Removal Filters
•    Arsenic Removal Systems
•    PFAS Treatment Systems
•    TCP Treatment Systems

Our experience covers a wide variety of treatment processes, with recent projects featuring:

•    Horizontal and Vertical Pressure Filters
•    Coagulation Filtration Systems
•    Adsorption Media Systems

In addition to process piping and mechanical installation, these projects often involve complex chemical storage and feed systems, all of which are executed with precision and attention to safety and environmental compliance.

Conco West, Inc. is committed to supporting clean, safe, and sustainable water solutions for communities and industries across California.

Stoneridge Well PFAS Treatment Facility

Zone 7 Water Agency – Northern California

2026 ACEC Engineering Excellence Honor Award

Conco West, Inc. recently completed the Stoneridge Well PFAS Treatment Project for Zone 7 Water Agency—one of the first PFAS treatment systems placed into operation in Northern California. This landmark project utilized a design-build delivery approach, enabling an accelerated construction schedule to meet stringent water quality and permit compliance requirements.

Key Features:

  • Pre-purchased Aquos-Vet PFAS Treatment Vessels
  • Pre fabricated fusion and CMLC steel piping, ranging from 4” – 36” in diameter above and below grade piping
  • Numerous large-diameter motor-operated valves (MOVs) and control valves designed to handle flows of up to 5,000 GPM from the existing 500 hpTurbine Well Pump
  • New control building construction, including major upgrades to the existing 4160 VAC electrical system

Project Challenges and Solutions:

The project site presented significant constraints due to its limited footprint and proximity to existing infrastructure. Conco West’s construction team successfully designed and executed intricate tie-ins to active transmission lines—ensuring system reliability throughout the build. The team coordinated closely with the agency to maintain continuous operations during all phases of construction.

Ongoing Work:

Final electrical system upgrades to the 4160 VAC system are currently in progress and are expected to be completed by Summer 2026. These upgrades will enhance the existing electrical system while supplying critical backup power and reliability to the operation of the facility.

Installation of PFAS Treatment Vessels – Stoneridge Well, Zone 7 Water Agency

Conco West, Inc. crews and subcontractors lift and place pre-purchased Aquos-Vet PFAS treatment vessels using a high-capacity crane. This image captures a key milestone in the construction of one of Northern California’s first operational PFAS treatment systems. The vessels were part of a fast-tracked design-build project that included large-diameter prefabricated piping, MOVs, and a new control building with electrical system upgrades.

Well 29 TCP Treatment Facility

City of Manteca – Clean Water for the Community

Conco West, Inc. recently completed the Well 29 TCP Project for the City of Manteca, delivering a critical infrastructure upgrade that now provides clean, high-quality drinking water to local residents.

This comprehensive project included:

  • Installation of site underground water and sewer utilities
  • Construction of structural foundation and site concrete paving
  • Installation of six Calgon Carbon Model 12 TCP treatment vessels
  • Manifold piping, mechanical process piping, and system connections
  • Complete electrical systems for treatment and controls
  • Landscaping and park enhancements, including:
    • New softball/baseball backstop
    • Basketball court improvements with new coating and striping

The Well 29 TCP Project showcases Conco West’s ability to successfully integrate water treatment systems with community space improvements, balancing technical performance with neighborhood benefit.