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Water Treatment Companies Serving Baltimore County

7 water filtration and water treatment companies that are based in or say they serve Baltimore County, in alphabetical order.

First Class Mechanical

Westminster, MD · (410) 876-2434 · Website

Westminster plumbing, HVAC and well pump contractor that installs softeners, sediment and backwashing filters, reverse osmosis units, UV systems and acid neutralizers, with free drinking water testing.

Five Star Plumbing Services

Joppa, MD · (410) 836-0118 · Website

Plumbing company serving Harford and Baltimore counties that installs softeners, drinking water reverse osmosis, carbon and UV filters, iron removal and acid neutralizers, with free well water testing.

HydroWells

Poolesville, MD · (301) 393-7090 · Website

Well drilling and service company based in Poolesville and Dickerson that installs and repairs softeners, sediment filtration, iron and manganese removal, UV and acid neutralizers, and arranges certified lab water testing.

Master Plumbing

Gaithersburg, MD · 301-650-9100 · Website

Gaithersburg plumbing contractor that installs water treatment systems including Aquasana filters and services existing systems of other brands.

National Water Service

Woodbine, MD · 301-854-1333 · Website

Woodbine company providing well pump service, plumbing and water treatment, including softeners, carbon and sediment filtration, reverse osmosis, iron and sulfur systems, UV and radon removal, for homes and commercial sites.

R&G Water Systems, Inc.

Hampstead, MD · 410-239-0700 · Website

Family-run Carroll County company that services well pumps and tanks and installs water softeners, whole-house and carbon filters, reverse osmosis units and UV systems. It offers a free basic water analysis.

Water Doctor

Annapolis Junction, MD · (410) 792-0327 · Website

Water treatment and well company that installs softeners, home filtration, reverse osmosis, UV sterilizers and iron and acid water treatment, and provides residential, commercial and lab-certified water testing plus well pump service.