Water Treatment & Filtration Company in Prince William County, VA

Providing Water Heater Services, Sump Pump Replacements and Water Filtration Systems for Over 40 Years

pump truck

Your water quality is never a worry when you hire National Water Service to manage your water filtration, water testing, or other water service needs for home and business. 


From bathroom faucets to water heater maintenance, the water that flows through your house can be trusted with our professional services and water solutions. National Water Service is a leader in water quality with decades of experience backing us up. We provide affordable, trusted water testing for every home and family, from city sources to country well water. 


Our loyal clientele relies on us for well pump replacementswater heater installations, water filtration systems, plumbing services, and more. Our commercial services for your business include everything from office water coolers to produce misting, and even water storage solutions. 


We aim to be your reliable one-stop for all water quality needs.  Contact us about our free consultation that tests your water’s current quality, and from there we will offer solutions and work together for any water needs you have. 


Live the National Water Service way, with safer and cleaner water. We utilize low maintenance systems that are simple to service, so cleaner water is a quick fix away. 

Residential Water Testing for Odors, Contaminants, and More

running waterSome people may suggest your water quality differs from being in the city versus the country, or your well water will surpass county water systems. The truth is that water quality varies from neighborhood to neighborhood, and all water sources are at risk of odors, contaminants, and more. The only way to ensure safe water is with water testing for your home. 


Contact National Water Service to get you started with a free basic analysis. We follow-up with offers of reasonable rates for any water solutions you may need as indicated by the results of your water test. It’s not just about clean water, it’s about safe drinking water for you and your family. 


We have solutions for the following home water issues, and  more:



Part of our residential services also include flood prevention, water storage solutions for a variety of systems, and services for your well.


All of our work is left neat and tidy once we are done, so any small tasks you want to handle can be done with ease, and follow-up services are no-hassle. With National Water Service, your water system works for you. 

Commercial Water Services for Restaurants, Labs, and Offices

Reverse Osmosis and a pressure tankTrust National Water Service as your commercial water service company in Prince William County  — we handle offices, doctor and science labs, office kitchens and water coolers, food industries, and more. From simple water filtration to water storage, we have the solution for your company. 


The commercial water services we offer include:



The reputation we hold has proven reliable, trustworthy, and exceedingly excellent in all water projects we are hired for on a commercial basis. When you own and manage a commercial property, there is enough for you to handle without being concerned about your water systems. Let the water professionals take care of any water needs so you can get back to business. 


There is no more questionable water quality or water filtration systems when contact National Water Service. Talk to us about obtainable, functioning commercial water filtration systems, storage systems, and more to fit your business needs. 


Emergency Water Services in Prince William County When You Need It the Most

pump crew toolsCustomer satisfaction is our top priority, so we listen to what our clientele needs. This includes offering emergency seven-day-a-week services, a plumber on staff, non-proprietary systems, and the top tools in the industry. We exceed expectations by going above and beyond what you expect for a water service company. 


National Water Service is available in Prince William County to complete your kitchen or bathroom remodel with our master plumber and crew on staff. We service your water heater, sump pumps, and more. With our team, the work completed on your home is consistent and unbeatable. Don’t settle for hiring several different companies when we can give you the dependability you’ve been searching for under one trusted name. 


National Water Service has been a leader in the water service industry for over forty years because we are committed to the quality of our work and always want to be a neighbor t0 our clients. For us, it’s not just about water service but reliable, proven solutions that work for you. 


Talk to us about any questions or concerns you have, or schedule a service to begin. We have special offers for new clients to get you started. We will put your mind at ease and get you back to enjoying your home and business. 

We Service Your City! 





Dale City


Lake Ridge




Bull Run

West Gate



Loch Lomond