Reliable Water Treatment Systems in Prince George’s County

Servicing Water Heaters and Water Filter Systems for Over 40 Years in Your Community

Water Testing

Safe, clean water for your home or business should never be something you need to worry about. From city addresses to country living, trusted water is what National Water Service in Prince George’s County is all about. 


Water for your kitchen taps and bathrooms to your laundry machines and water heaters should always be trusted, safe, and clean. Our team of professionals has been around for decades and we have become leaders in water quality. Our mission is to provide affordable, trusted water testing for every home and family, among all other water services you may need, like sump pump replacements and plumbing repairs. 


Repeat clients rely on us for well pump replacements, water heater installations, water filtration systems, plumbing services, and more each and every year. We handle office water coolers and produce misting with trusted equipment that provides safe water, every time for businesses in your area, too. 


National Water Service is your one-stop-shop for all water quality services. We provide a free consultation that covers testing your home or business’ current water quality and then we create an action plan specific to you. You have nothing to lose and a lot to gain by calling us today for your water service needs. 


Live the National Water Service way, with safer, cleaner water from a low maintenance system that is simple to service.

Residential Water Testing that Keeps Your Drinking Water Safe

City Water In-Home Water Treatment. A Reverse Osmosis for up too 99.9% contaminant free cooking & drinking water, a Water Softener for Hard Water and a Carbon Tank.

Your drinking water should be safe, clean, and trusted, straight from your home kitchen faucet. Whether you have city water or well-provided water in the country, there are solutions for any contaminants or smells you may be experiencing. From cooking needs to clean shower water and all the appliances in between, we have your water quality covered. 


National Water System provides reliable water testing in Prince George’s County, whether you are purchasing a new home or catching up on your to-do list. Our professional water service crew is available to give you answers to any concerns and provide water treatment solutions for any results you receive from your water testing. 


Home residential services from National Water Service also include well pump repairs, water heater installations, and we are a trusted plumbing company. No matter what water service your home needs, we have it covered. 


Call or email us today to discuss:


When you work with National Water Service, we put your needs first. The customer service quality we provide is so reliable that clients continue to call us for decades to return to their homes when they need our services. Put your home in the hands of our team, and know you are working with professionals who are reliable and whose quality is unbeatable.

Unrivaled Commercial Water Services for Grocery Markets, Office Buildings, and More

Whole Foods misting services

National Water Service is a leading commercial water service company because we understand safe, clean water does not stop at your home. Businesses and commercial properties have water needs, and we have the water solutions for them all, from water coolers to kitchens and more. 


Some of the many commercial water services we offer to Prince George’s County include:


Our experienced crewmen have been proven reliable, trustworthy, and exceedingly excellent in all water projects. The work we provide includes a finish that is neat, tidy, and organized; whenever you need to inspect your equipment or complete a follow-up service, it can be completed quickly, with no hassle.  


Don’t let another day pass with unknown water quality being provided to your customers, employees, or produce maintenance. Contact National Water Service for obtainable, functioning commercial water filtration systems and more. 

Emergency Water Services in Prince George’s County

new constant pressure pump and well cap replacement

Our clients and your needs come first, which is why we offer seven-day-a-week emergency water services as part of our promise to always deliver excellent service. 


To ensure we can be the one water company you can trust for all your home or business needs, we listen to your feedback and strive to deliver every water service you may need. This is why we are now becoming a leading plumbing company in Prince George’s County, with a master plumber and crew on staff, so you can call us for any of your plumbing needs in addition to water testing. 


The extent of our water services is unrivaled by any other water company servicing your community. We have been a leader in the water service industry for forty years because we are committed to the quality of our work and always want to be a neighbor t0 our clients — it is important to us that you have trust in your water, and that begins with a dependable water company. 


Contact us about any questions, concerns, or to schedule a service. We have special offers for new clients, so you can feel comfortable from the very beginning with what we have to offer. We promise to put your mind at ease and get you back to enjoying your home and business with trusted water services that are no hassle. 

We Service Your City! 


Upper Marlboro



College Park



Oxon Hill

Capitol Heights

Fort Washington




Temple Hills

District Heights



Riverdale Park



New Carrollton


Mount Rainier

Glenn Dale





Camp Springs


University Park

Berwyn Heights

Hillcrest Heights

Langley Park


Landover Hills


Fairmount Heights



Walker Mill



North Brentwood

Lake Arbor

Marlow Heights



Cottage City

Forest Heights