Water Filtration & Treatment in Westchester County, NY

Water filtration and treatment companies install whole-house filters, water softeners, UV disinfection, and systems that treat well water for things like iron, bacteria or radon. About 6% of Westchester County residents are served by private wells, according to the county health department, and water equipment usually sits in the basement. Treatment has to match what is actually in your water, so start with a lab test.

What to know in Westchester

Public water suppliers in Westchester test and report on their water, while private well owners are responsible for their own. The county health department says private wells must be tested when a property is sold or leased and before use of a new well, and recommends periodic testing otherwise. Water treatment itself is not a county-licensed trade, but connecting plumbing generally requires a licensed plumber, so ask who does that work and for the license number.

Budgeting? See our Water Filtration & Treatment Cost in Westchester, NY guide.

Water filtration by town

8 water filtration companies serving Westchester County

Independent firms first, then out-of-county firms, then franchise or network affiliates. Ratings show their source; blank means we have not collected one. Listing is free and is not an endorsement.

Frequently asked questions

Do I need a filter or softener?

Test first. The CDC says no single treatment removes every problem, so check that a system removes the specific germ or chemical your test found. HomeGuide notes that softeners treat hardness but do not filter water.

How often should a private well be tested?

The Westchester County Health Department says EPA recommends testing private water supplies annually for nitrate and coliform bacteria, or more often if you suspect a problem.

Can radon be removed from well water?

EPA describes two whole-house options for private wells: granular activated carbon filters and aeration devices. GAC tends to cost less, but radioactivity collects on the filter and can require special disposal. Start by testing your well for radon.

Does a water treatment company need a county license?

Water treatment alone is not a county-licensed trade, but plumbing connections generally require a county master plumber license. Check the county's trade license search.

Why is the equipment in the basement?

Whole-house filters are usually installed at the main shut-off, and HomeGuide says basements, garages and utility closets are common places for them.

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