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- Our Locations
  - Darnestown MD
  - Highland MD

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Home
Services
Common Water Problems
About NWS
Resources
Contact Us
- Our Locations
  - Darnestown MD
  - Highland MD

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Water Softener

Booster Pumps

Solution Feeders

Commercial Systems

Radon Remediation

Constant Pressure

Reverse Osmosis

Point of Use Faucets

Flood Prevention

Carbon Tanks

Well Pumps & Repairs

Sump Pumps

Acid Neutralizers

Sediment Filtration

UV Disinfection

Multi-Use Systems

City Water Systems

Water Storage Tanks

Pressure Tanks

Water Heaters

Men At Work

Get In Touch

For over 40 years, National Water Service has been the leading water company throughout the Mid-Atlantic Region.

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Contact Info

Main Office

7249 Mink Hollow Road
Highland, MD 20777
(301) 854-1333
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Our Store
14111 Seneca Road
Darnestown, MD 20874
(410) 379-1993
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Call Us

Maryland: (301) 854-1333
Washington DC: (301) 854-1333
Baltimore: (410) 379-1993
Virginia: (540) 882-4006
Fax: (301) 854-1538

Email: info@nationalwaterservice.com

Featured Cities We Service

Clarksville, Maryland
Gaithersburg, Maryland
Germantown, Maryland
Rockville, Maryland

Featured Counties We Service

Frederick County, MD
Howard County, MD
Montgomery County, MD
Loudoun County, VA
Anne Arundel County, MD
Baltimore County, MD
Carroll County, MD
Prince George’s County, MD
Fairfax County, VA
Prince William County, VA
Washington, D.C.