Prince William Water provides drinking water and wastewater services for homes, businesses, schools and public facilities throughout Prince William County via a robust infrastructure network. 

Maintaining reliable operations, meeting service demand, and complying with regulatory requirements requires significant capital investment and long-term planning. 

Prince William Water has a Capital Improvement Program (CIP) that identifies projects necessary to maintain or upgrade the system in the next five years and beyond. The Fiscal Year 2025-2029 CIP totals $638 million, a significant infrastructure investment in our community. Our capital projects include water and sewer mains, sewage pumping stations, water booster stations, water tanks and more.

Some projects replace aged infrastructure, address new regulatory requirements, improve system reliability or resolve operational concerns. Other projects are needed to expand the capacity of the system as development occurs in Prince William County in accordance with the County’s Comprehensive Plan. 

Some major capital projects currently under construction include:



• Route 1 Water Main Replacement 

• Heritage Hunt Sewage Pumping Station Replacement and Force Main

• Occoquan River Crossing - new water transmission mains under the Occoquan River 

• H.L. Mooney Advanced Water Reclamation Facility (Mooney AWRF) Improvements 

The $200 million Mooney AWRF project is the largest infrastructure project in our history and will enhance virtually every step in the wastewater treatment process. The Mooney AWRF facility treats an average of 5.47 billion gallons of wastewater annually and returns reclaimed water to Neabsco Creek—part of the Chesapeake Bay Watershed.

The project, scheduled for completion in late 2027, includes a new headworks facility—where the first step in the treatment process occurs—and incorporates upgraded odor control, electrical systems and ultraviolet disinfection equipment.

For more information about our capital projects, including an interactive map, click here.

A key element to providing clean drinking water and protecting the environment is ensuring that Prince William Water’s infrastructure is maintained and in good working condition. This requires significant capital investment.

In the graphic below, you can see some of the $1.2 billion in infrastructure that Prince William Water operates and maintains to ensure a constant flow of drinking water to our customers as well as the safe removal and reclamation of wastewater.



This interconnected system—from our water sources to your tap and back again—requires regular maintenance and rehabilitation. While you may see our employees in the community flushing hydrants, testing water valves or managing facilities, about two-thirds of our infrastructure is underground, including 2,500 miles of water and sewer pipes. That’s enough pipe to stretch from Woodbridge to Los Angeles!

This infrastructure supports our community with essential resources—clean, safe and dependable drinking water and wastewater reclamation services. 



Visit the Learning Library at www.PrinceWilliamWater.org where you can learn about water quality, wise water use, our investment in clean water and more. Check out a few examples from this online information hub:

Lead-Safe Prince William:

Learn about our response to EPA’s nationwide lead and copper regulations and view an interactive map with an inventory of service line materials.

Salt Smarts:

Read about how you can

be salt smart and help

protect our water sources.

Rates & Fees:

Learn about how Prince William Water sets rates, fees and developer charges.

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