Nanuet Water Hardness & Quality Report (2026)
Water Hardness
8.5 grains per gallon
Source
reservoir
pH Level
8
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
341 mg/L
Est. Daily Cost
$0.39
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 Nanuet, your appliances are currently losing 19% efficiency due to mineral buildup.
| Appliance | In Nanuet | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.8 yrs | 8.5 yrs | -44% |
| Washing Machine | 8.2 yrs | 12 yrs | -32% |
| Water Heater | 9.8 yrs | 15 yrs | -35% |
Regional Water Comparison
How Nanuet compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Nanuet, New York | 145 mg/L | 7 ppt | 🟠 Hard | reservoir |
| Pearl River, New York | 142.5 mg/L | 6.8 ppt | 🟠 Hard | reservoir |
| Spring Valley, New York | 177 mg/L | 8.5 ppt | 🟠 Hard | reservoir |
| Monsey, New York | 102.5 mg/L | 5 ppt | 🟡 Moderately Hard | reservoir |
| New City, New York | 155 mg/L | 7.4 ppt | 🟠 Hard | reservoir |
National Benchmark
How Nanuet compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Nanuet | 145 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Nanuet's Water Unique?
Local geology and source profile
Nanuet, New York, in Rockland County — an unincorporated Rockland County hamlet adjacent to Spring Valley and Monsey in the central Rockland County corridor — receives its municipal water from Suez Water Rockland (formerly United Water Rockland), drawing from the Rockland County reservoir system in the Harriman-Ramapo Mountains, the same supply as Monsey NY (batch 143).
The moderately hard 145 mg/L hardness and TDS of 341 mg/L are slightly harder than the adjacent Monsey NY reading (102.5 mg/L, TDS 196) despite the same supply source — suggesting Nanuet may receive a higher fraction of the slightly harder lowland Hackensack River supply or Triassic Newark Basin groundwater contribution. The Hudson Highlands (Precambrian Reading Prong gneiss — insoluble) and the Triassic Newark Basin calcareous margin produce the variable Rockland County hardness readings across distribution zones.
At 145 mg/L, Nanuet's water is moderately hard — scale builds in kettles and appliances over months, dishwashers benefit from rinse aid, and bathroom fixtures develop calcium deposits. Quarterly descaling is appropriate. The PFAS level of 7.0 ppt warrants a certified drinking water filter — the Stewart Air National Guard Base (Orange County — AFFF in the Hudson-Hackensack watershed), the Rockland County industrial PFAS legacy, and the lower Hudson Valley PFAS complex contribute to Nanuet's elevated readings.
Geology & Source: Nanuet in Rockland County draws from Suez Water Rockland on the Hackensack River watershed (Rockland County, Harriman-Ramapo area) — the Rockland reservoirs drain the Hudson Highlands (Precambrian Storm King Granite-Gneiss) — New York Hudson Highlands Precambrian crystalline watershed produces moderately hard water at 145 mg/L with TDS 341 mg/L in this Rockland County New York hamlet.