Dobbs Ferry Water Hardness & Quality Report (2026)
Water Hardness
7.9 grains per gallon
Source
reservoir
pH Level
7.9
neutral = 7.0
Lead
0.006 mg/L
✓ Below action level
TDS
301.2 mg/L
Est. Daily Cost
$0.36
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 Dobbs Ferry, your appliances are currently losing 18% efficiency due to mineral buildup.
| Appliance | In Dobbs Ferry | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 5.2 yrs | 8.5 yrs | -39% |
| Washing Machine | 8.6 yrs | 12 yrs | -28% |
| Water Heater | 10.2 yrs | 15 yrs | -32% |
Regional Water Comparison
How Dobbs Ferry compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Dobbs Ferry, New York | 134.5 mg/L | 6.5 ppt | 🟠 Hard | reservoir |
| Greenburgh, New York | 92.5 mg/L | 4.5 ppt | 🟡 Moderately Hard | reservoir |
| Tarrytown, New York | 117 mg/L | 5.7 ppt | 🟡 Moderately Hard | reservoir |
| Sleepy Hollow, New York | 135.5 mg/L | 6.5 ppt | 🟠 Hard | reservoir |
| Eastchester, New York | 63.5 mg/L | 3.2 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How Dobbs Ferry compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Dobbs Ferry | 134.5 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Dobbs Ferry's Water Unique?
Local geology and source profile
Dobbs Ferry, New York, in Westchester County — a Westchester County village adjacent to Tarrytown and Ardsley on the Hudson River in southeast New York — receives its water from Suez Water New York, drawing from Kensico Reservoir and the Croton watershed system through the southeast New York distribution.
The moderately hard 134.5 mg/L hardness and TDS of 301.2 mg/L reflect the Westchester County supply's moderate character — the Precambrian Hudson Highlands Gneiss provides insoluble dilution while Cambrian Wappinger Limestone and Ordovician Beekmantown Group contribute calcareous mineral content from the Hudson Valley limestone belt (compare Tarrytown NY: 132/295 in Westchester County comparable; Ardsley NY: 136/307 in Westchester County comparable; Dobbs Ferry consistent moderate from the same Westchester County Kensico Reservoir Precambrian-Cambrian calcareous supply). The Croton watershed — Precambrian Hudson Highlands Gneiss (insoluble — primary dilutant), Cambrian Wappinger Limestone (calcareous — primary hardness contributor), and Quaternary Croton alluvium (slightly calcareous — minor TDS).
At 134.5 mg/L with TDS 301, Dobbs Ferry's water is moderately hard — scale builds in appliances. Semi-annual descaling is appropriate. The PFAS level of 6.5 ppt warrants a certified drinking water filter. Review Suez Water New York's annual water quality report.
Geology & Source: Dobbs Ferry in Westchester County draws from the Suez Water NY on Kensico Reservoir (Westchester County, southeast New York) — the Croton watershed drains Precambrian Hudson Highlands Gneiss (insoluble) and Cambrian Wappinger Limestone (calcareous) — New York Westchester County Kensico Reservoir Precambrian-Cambrian calcareous supply produces moderately hard water at 134.5 mg/L with TDS 301.2 mg/L.