For over 30 years WSI has been building and designing wastewater treatment systems and equipment
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    At WSI we only use the highest sourced stainless steel and products. We do not compromise when it comes to quality.
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    We have the best trained wastewater support staff in the world
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Wastewater Treatment Plant Designs

Design-Build WWTP

WSI has the capability to build large scale wastewater treatment plants for major community centers and industrial operations. Our plants have phased designs to accommodate early budgets and meet future demand and local regulations.
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Modular Wastewater Treatment Plants

Our pre-designed and pre-fabricated packaged plants are perfect when it's not feasible to tie into a traditional centralized wastewater treatment plant. These plants are best used in land development, housing, subdivisions and small to medium sized communities.

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Containerized Wastewater Treatment Plants

WSI containerized plants are prefect for temporary operations, remote locations and man camps. Our plants use the latest in wastewater technology and controls so a single part-time operator can operate the plant 24/7. These plants can be interconnected to increase capacity.

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Custom Equipment

We build dissolved air flotation,
belt presses and and coagulation systems
all over the world.

At WSI there is not much we can't design. We've built custom wastewater equipment for almost every industry.


Browse Our Inventory

Dissolved Air Flotation Systems (DAF)

WSI has a standard line of DAF systems that are per-designed and ready for fabrication.

Belt Presses

Our belt presses are the best in the industry due to their heavy duty tubular design.

​About Us

WSI International has been designing industrial and municipal wastewater treatment plants and wastewater equipment for over 30 years. We are currently maintaining over 80 plants around the world.

Our staff has the expertise to tackle any wastewater project in Oil &Gas, Food & Beverage, Industrial Pre-Treatment, and Municipal.

Call us to design your next plant

(303) 985-0885

Why choose WSI International?

  • Safety & Compliance Ensured
  • Start-to-Finish Solutions
  • Reliable Services
  • Sustainable
  • Trained Professionals
  • On Time Delivery
  • All Stainless Steel Design

Operational Experience 

WSI is well diversified in several markets, including Oil and Gas, Food and Beverage, Municipal and Mining.



  • Application Only up to $500,000
  • Up to $10,000,000 with Financial Package
  • Terms 12-84 Months
  • Technology & Equipment Upgrades
  • 100% Financing
  • All Soft Costs Included (Maintenance, Install, etc.)
  • New & Used Equipment


Engineering Office 
1709 W Baltic PL

Englewood CO 80110

Phone: (303) 985-0885

Corporate Office

77 West St, Suite 305

Annapolis MD 21401

Phone: (443) 320-0211