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Water filter service in White Plains, NY

Testing, installation, and service for homes and businesses in White Plains, Westchester County. What follows is what we can source about the water here.

Westchester County Population 62,561
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What is in the water in White Plains

White Plains is served by City of White Plains Department of Public Works .

Source water: All of it, 100 per cent of the raw water, comes from the New York City system drawn at Kensico Reservoir and bought through Westchester County Water District Number 1. What reaches Kensico is Catskill and Delaware water from east of the Hudson and, at times, Croton water from Putnam and Westchester counties, so White Plains is one of the places that sits on the join between the two rather than on one of them. The city's own sources are dormant. Its three wells, which produced roughly 150,000 to 200,000 gallons a day, came out of service in 2009, and the reservoir is out too; the city is rebuilding its filtration plant so that both can return under a single plant meeting current state rules, with service expected to resume in 2027. An emergency interconnection to the Delaware Aqueduct at Shaft 22 in Yonkers, delivered through the Kensico Bronx pipeline, can carry the city's entire requirement on its own. Reported by City of White Plains for 2024.

Kensico water is unfiltered. A filtration exemption covers the Catskill source south of Kensico and the Delaware source, granted on the strength of raw water quality and demonstrated source protection, and the Surface Water Treatment Rule requires an unfiltered source to achieve at least 99.9 per cent inactivation of Giardia lamblia cysts and 99.99 per cent of enteric viruses. Treatment on the district pipeline is fluoride, chlorine disinfection, ultraviolet light as a second disinfection barrier, pH adjustment with caustic soda and orthophosphate. The ultraviolet stage is the one worth knowing about, because it is aimed at chlorine resistant organisms including Cryptosporidium, which is precisely what a domestic ultraviolet unit certified to NSF/ANSI 55 is sold to do. On this supply that purchase duplicates a barrier already in place. The 2024 report records no violation of any standard: over 170 contaminants tested, 18 detected, none above a state limit.

These figures describe the distribution system. Your own tap can differ, and for lead it very likely does.

We do not yet hold a sourced figure for every field on this page. Where something is missing it is left blank rather than estimated, because an unsourced number here would look like information.

Buildings and plumbing in White Plains

Orthophosphate on the district pipeline is what stands between the water and the lead in any pipe it passes through, because the supply itself carries none. A phosphate film protects a pipe while water moves through it and loses ground while water stands, so the highest reading in a White Plains house is the first draw after a night or a weekend, and thirty seconds of flushing removes most of the exposure at no cost. The city's water quality page links through to the New York State service line inventory, so the recorded material for an address is looked up through the state rather than a city map, and lead and copper are on the city's routine testing schedule.

What this means in practice

What these figures mean for filter choice

Lead is a plumbing question rather than a supply question in White Plains, as it is everywhere. What that means practically is that a filter certified under NSF/ANSI 53 for lead at the tap you drink from sits downstream of the entire problem, whereas a whole-house filter at the point of entry sits upstream of nearly all of it and costs several times more.

Filters that apply here

  • Lead reduction filters. Point-of-use filters certified for lead under NSF/ANSI 53.
  • Under-sink carbon filters. A carbon block cartridge on the cold line under the sink.
  • Reverse osmosis, tank. A membrane system under the sink that produces treated water to a dedicated tap and stores it in a small pressure tank.
  • Whole-house filtration. A filter plumbed into the main line where water enters the building, so every tap, shower, and appliance downstream is fed treated water.
  • Sediment filters. A mechanical filter that captures sand, silt, rust flakes, and other particles.

Installation in White Plains

Renters, co-ops, and businesses

Nearby areas

Sources

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