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Water...It's What We do
At National Water Service, we ensure residents of Maryland, DC, and Virginia receive exceptional plumbing and water treatment services from our team of experienced and licensed technicians.
National Water Service has been providing residential & small commercial water treatment, plumbing & well pump services for over 45 years. We specialize in water treatment, filtration & purification solutions as well as general plumbing to ensure clean, safe water for our customers in Maryland, DC & Northern Virginia.
At National Water Service, we’re not just keeping up with industry trends—we’re leading the way. By testing cutting-edge technologies and integrating advanced solutions, we ensure your water treatment, plumbing, and well systems are efficient, reliable, and future-ready.
We implement state-of-the-art tools and techniques.
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Ensuring your systems stay effective for years to come.
Responsive
Knowledgeable
I can’t say enough about National Water Service. The team is very knowledgeable about the water treatment business. Great service, courteous techs, and on time for appointments. In emergencies NWS has always been there for me. Thank you and keep up the good work. I would highly recommend!!!🤩🤩🙌🏽
Cost-Effective
I had a leak in my whole house water filtration system that no plumber could figure out. Enter Peter and Christian from National Water Service, who diagnosed the problem in short order AND came up with a cost effective resolution! They were knowledgeable, professional, personable and great to work with! Thank you!
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Please Note: We ONLY serve Maryland, Northern VA, and Washington DC
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National Water Service has been providing residential & small commercial water treatment, plumbing & well pump services for over 45 years. We specialize in water treatment, filtration & purification solutions as well as general plumbing to ensure clean, safe water for our customers in Maryland, DC & Northern Virginia.
Mon - Fri
7:00am - 5:00pm
Sat - Sun
Emergency Service Available
