Water… It’s What We Do!
National Water Service is based in Maryland and proudly serves residential and commercial customers across the Mid-Atlantic region. From city neighborhoods to rural communities, our expert technicians are on the road daily to ensure clean, safe, and reliable water systems for homes and businesses.
We regularly service areas throughout:
Montgomery County, MD – including Rockville, Bethesda, Potomac, and Silver Spring
Howard County, MD – including Columbia, Ellicott City, and Clarksville
Frederick County, MD – including Frederick, Urbana, and Middletown
Carroll County, MD – including Westminster and Sykesville
Northern Virginia – including Fairfax, Great Falls, and Loudoun County
Washington, DC Metro Area
Surrounding rural communities and well water regions
Whether you need emergency well pump service, water filtration system installation, or routine maintenance, we’re your trusted local water experts—just a call away.
Not sure if you’re in our service area?
Contact us and we’ll let you know right away.
Monday – Thursday: 7am – 5pm
Friday: 7am – 4pm
Saturday and Sunday: 6am – 6pm
With over 45+ years of experience in water repair and management, we are proud to offer dedicated Water Techs & Master Plumbers to homes and businesses. Get affordable pricing, competitive quotes, and quality materials that last.
We serve residential and small-commercial customers throughout Maryland, Washington, D.C., and parts of Northern Virginia, including counties like Montgomery, Howard, Frederick, Carroll, Anne Arundel, Baltimore, Prince George’s MD, Loudoun, Fairfax, Prince William, and the DC metro area
Our featured service cities include Clarksville, Gaithersburg, Germantown, Rockville, Columbia, Silver Spring, Waldorf, Ellicott City, Bowie, Glen Burnie, Towson, Dundalk, Bethesda, Highland, and Darnestown, MD.
Yes! In addition to urban areas, we regularly serve surrounding rural communities and well-water regions across our footprint.
Water is not always safe to consume or use. It is often polluted or has high levels of naturally occurring substances. For instance, many water deposits contain manmade contaminants. These pollutants may include chemicals such as bromodichloromethane, choroform, halocetic acids, nitrates and more. In addition, they may also contain Per- and Polyfluoroalkyl substances. Pollution from these chemicals are known to cause liver damage, decreased fertility, high cholesterol cancer, and other diseases of the like. Therefore, water containing these substances is not safe for consumption.
We offer water treatment, well pump services, plumbing and mechanical services, as well as maintenance—including emergency well pump repairs, filtration system installations, and routine upkeep
We’re more than a water treatment company—we’re your one-stop solution for clean water, strong plumbing, and dependable well systems. Our team combines decades of experience with a commitment to quality and service.
If you’re dealing with water problems—or just want to avoid them—reach out today.
Fill out our contact form and one of our experts will follow up with you soon.
Our offices are open Monday–Thursday from 7 a.m. to 5 p.m., and Friday from 7 a.m. to 4 p.m. We also offer emergency service on weekends from 6 a.m.–6 p.m.
Simply contact us by phone at (301) 854‑1333 or email service@nationalwaterservice.com. You can also submit an inquiry via our website—we’ll confirm coverage ASAP
Our central service office is at 2878 Daisy Road, Woodbine, MD 21797 .
Absolutely. We serve both residential homes and small commercial properties throughout our service region.
Water quality can vary widely—even within nearby regions. Our local presence ensures fast response times and tailored solutions based on your area’s unique water characteristics.
With over 45 years of experience in Maryland, DC, and Northern Virginia, our expert technicians offer unmatched expertise in water treatment, plumbing, and well pump services.
