Greenburgh Water Hardness & Quality Report (2026)
Water Hardness
5.4 grains per gallon
Source
reservoir
pH Level
7.6
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
166.8 mg/L
Est. Daily Cost
$0.25
energy & soap waste
Source: USGS Water Quality Portal · Updated 2026
0–60
mg/L
Soft
61–120
mg/L
Moderately Hard
121–180
mg/L
Hard
180+
mg/L
Very Hard
Appliance Damage Report
In Greenburgh, your appliances are currently losing 12% efficiency due to mineral buildup.
| Appliance | In Greenburgh | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.5 yrs | 8.5 yrs | -24% |
| Washing Machine | 10.2 yrs | 12 yrs | -15% |
| Water Heater | 11.9 yrs | 15 yrs | -21% |
Regional Water Comparison
How Greenburgh compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Greenburgh, New York | 92.5 mg/L | 4.5 ppt | 🟡 Moderately Hard | reservoir |
| Scarsdale, New York | 164.5 mg/L | 7.9 ppt | 🟠 Hard | reservoir |
| White Plains, New York | 172 mg/L | 8.2 ppt | 🟠 Hard | reservoir |
| Eastchester, New York | 63.5 mg/L | 3.2 ppt | 🟡 Moderately Hard | reservoir |
| Wykagyl, New York | 92.5 mg/L | 4.5 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How Greenburgh compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Greenburgh | 92.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Greenburgh's Water Unique?
Local geology and source profile
Greenburgh, New York — the largest town in Westchester County by population, including the communities of Ardsley, Dobbs Ferry, Elmsford, Hastings-on-Hudson, Irvington, and Tarrytown — draws its municipal water supply from Westchester Joint Water Works and local district systems, sourcing from the New Croton Aqueduct system (New Croton Reservoir) and connections to the New York City DEP Catskill–Delaware supply through Westchester County Water District agreements. Water hardness measures 92.5 mg/L — classified as moderately soft.
Greenburgh's moderately soft supply reflects the character of the New Croton Reservoir watershed in Westchester County. The Croton watershed (Croton River drainage) drains the Westchester County Highlands — underlain by Precambrian gneiss and migmatite of the Manhattan Prong (the Precambrian metamorphic terrane extending northeast from Manhattan along the Hudson Valley) and the Pound Ridge Gneiss. These ancient metamorphic rocks contribute minimal dissolved calcium to rainfall drainage — producing inherently soft watershed water. The Westchester distribution infrastructure adds moderate mineral content through cast-iron distribution mains, resulting in the 92.5 mg/L finished hardness in the Greenburgh zone.
With hardness at 92.5 mg/L, Greenburgh residents experience light to moderate scale accumulation. Faucet aerators and showerheads develop deposits slowly — bi-monthly cleaning with citric acid solution is sufficient. Dishwashers produce clean glassware. Westchester Joint Water Works and local districts consistently deliver water meeting all NYSDOH and EPA Safe Drinking Water Act requirements.
Geology & Source: Reservoir supply from the New Croton Reservoir and Catskill–Delaware systems via Westchester County water districts and New York City DEP supply contracts — the Westchester County Precambrian gneiss and Manhattan Prong metamorphic terrain; moderately soft supply at 92.5 mg/L in the Greenburgh–White Plains zone of Westchester County.