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Water Treatment Companies Serving Washington, DC
22 water filtration and water treatment companies that are based in or say they serve Washington, DC, in alphabetical order.
Acker & Sons Plumbing & Heating
A Kensington plumbing and heating company that installs and services water filtration and treatment systems for a range of brands, serving Montgomery County, Washington, DC and Virginia.
Bond Water Technologies, Inc.
A commercial and industrial water treatment firm (not residential) serving Maryland, Washington DC, Virginia and the Carolinas. It handles cooling tower and boiler water, wastewater, and lab and Legionella testing.
Brian B. Quick Plumbing
A Maryland plumbing company with Beltsville and Reisterstown offices that offers water treatment in Washington, DC and Baltimore. It installs whole-house filters on the main line and water softeners, and maintains reverse osmosis and cartridge systems.
Chemstar WATER
A commercial water treatment company serving Maryland and Washington, DC. Its work covers cooling tower and boiler treatment, Legionella prevention and water management plans, closed-loop systems and lab testing for buildings.
Cherry Blossom Plumbing
An Arlington plumbing company serving Northern Virginia and Washington, DC. It offers free water testing for hardness, chlorine and sediment, then sizes whole-home carbon or sediment filtration, softeners or reverse osmosis to the results.
ClearWave Water Solutions
A Virginia water treatment company with an Arlington office and a Washington, DC service page. It offers free water testing, softener installation, reverse osmosis drinking water systems, whole-house filtration, salt-free conditioners and UV disinfection.
Douglas & Son Services
A Montgomery County home services company that serves Maryland, Northern Virginia and the Washington, DC region. It installs water filtration systems and water softeners for homes and light commercial properties.
DS Home Inspection Services, LLC
A home inspection company that offers water quality testing (iron, lead, nitrate, nitrite, bacteria and turbidity), lead and copper testing for older homes, radon-in-water testing and well water testing, with Washington, DC in its service area.
F.H. Furr Plumbing, Heating, Air Conditioning & Electrical
A Northern Virginia home services company with a DC Metro water treatment page. It installs water softeners, reverse osmosis units, point-of-use filters and point-of-entry whole-house filters.
Hague Quality Water of Maryland
A family-owned Maryland water treatment dealer whose Washington, DC page covers both municipal and well water. It offers free water testing, softeners, reverse osmosis, whole-home filtration, well treatment including UV, and commercial systems.
JM Plumbing & Heating
A Northern Virginia plumbing company whose water page covers whole-house filtration and multi-stage reverse osmosis for kitchen sink or refrigerator drinking water, with service in DC, Maryland and Northern Virginia.
Len The Plumber Heating & Air
A plumbing and HVAC company with Silver Spring and Beltsville offices that has a Washington, DC service area. It installs whole-house filtration and softeners, and for well homes it tests water and installs filtration, softening, disinfection (including UV) and reverse osmosis.
Logan Mechanical
A Prince George's County mechanical and plumbing contractor serving DC, Maryland and Northern Virginia. It installs, replaces, repairs and maintains water softeners and also lists water filtration installation and service.
Master Plumbing
A Gaithersburg plumbing company serving Maryland and DC. It installs Aquasana water filters, maintains and repairs existing filtration systems of various brands, and offers water treatment consultations.
National Water Service
A Maryland water treatment and plumbing company that says it serves all of Washington, DC. Its DC page covers compact softeners for condos and townhomes, catalytic carbon filtration for chloramine, reverse osmosis and free in-home water testing; it also handles well water and commercial systems.
NextDay Inspect
A home inspection firm that offers water testing as a separate environmental service in Northern Virginia, Maryland and Washington, DC.
Peak Environmental
An environmental testing company with Poolesville and Columbia offices that offers home water testing across central Maryland, Northern Virginia and Washington, DC.
Plumber In DC
A DC plumbing company that says it serves the whole District. Its services include installing water conditioning and filtration systems and reverse osmosis, along with general plumbing.
Pristine Water Treatment
A Stafford-based water treatment company that lists Washington, DC among its service areas. It offers free in-home and paid lab water testing, softeners, iron, sulfur and acid-neutralizer systems, reverse osmosis, whole-house carbon filtration and UV for wells, and repairs most makes.
Roto-Rooter Plumbing & Water Cleanup (Washington, DC)
The Washington, DC branch of the Roto-Rooter plumbing network. Its local page says it installs and services salt-based, salt-free and dual-tank water softeners and also links to whole-house filtration and a hard water test.
Sila Heating Cooling Plumbing
A heating, cooling and plumbing company serving DC, Maryland and Virginia. It installs whole-home filtration at the main line, point-of-use filters, reverse osmosis and water softeners after hardness and water-quality testing.
Water Testing Labs of Maryland, Inc.
A water testing laboratory serving Maryland, Delaware, Washington DC and Northern Virginia. It tests water for personal use, real estate transfers and community water supplies, and sells test kits such as a lead and copper kit.