Manhattan Valley Water Hardness & Quality Report (2026)
Water Hardness
6.3 grains per gallon
Source
reservoir
pH Level
7.7
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
210.5 mg/L
Est. Daily Cost
$0.29
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 Manhattan Valley, your appliances are currently losing 14% efficiency due to mineral buildup.
| Appliance | In Manhattan Valley | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.1 yrs | 8.5 yrs | -28% |
| Washing Machine | 9.6 yrs | 12 yrs | -20% |
| Water Heater | 11.3 yrs | 15 yrs | -25% |
Regional Water Comparison
How Manhattan Valley compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Manhattan Valley, New York | 107.5 mg/L | 5.2 ppt | 🟡 Moderately Hard | reservoir |
| Manhattan, New York | 36 mg/L | 7.2 ppt | 🟢 Soft | reservoir |
| Upper West Side, New York | 68.5 mg/L | 3.4 ppt | 🟡 Moderately Hard | reservoir |
| Morningside Heights, New York | 107.5 mg/L | 5.2 ppt | 🟡 Moderately Hard | reservoir |
| East Harlem, New York | 108 mg/L | 5.2 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How Manhattan Valley compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Manhattan Valley | 107.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Manhattan Valley's Water Unique?
Local geology and source profile
Manhattan Valley, New York, a neighborhood on the upper west side of Manhattan in New York County — a dense urban Manhattan neighborhood at the northern end of the Upper West Side (roughly between 100th and 110th Streets west of Central Park), a historically diverse and densely populated Manhattan neighborhood with significant Dominican-American, Puerto Rican, and West African communities, adjacent to Morningside Heights (Columbia University) and the Upper West Side, and a gentrifying upper Manhattan west side neighborhood — draws its municipal water supply via the NYC DEP. Water hardness in Manhattan Valley measures 107.5 mg/L — classified as moderately hard.
Manhattan Valley's moderate hardness reflects the NYC DEP Catskill–Delaware supply and upper Manhattan distribution characteristics. The Catskill–Delaware reservoir system produces soft source water (approximately 40–60 mg/L). Manhattan's distribution infrastructure in the upper west side Manhattan Valley zone (a mix of late 19th–early 20th century and mid-20th century mains) accumulates moderate hardness from the source supply, producing the moderate 107.5 mg/L. The upper Manhattan west side tends to be moderately harder than lower Manhattan due to the older infrastructure and longer distribution path.
At 107.5 mg/L, Manhattan Valley residents encounter moderate scale accumulation. Monthly cleaning with citric acid solution is recommended. NYC DEP consistently delivers water meeting all New York State DEC and EPA Safe Drinking Water Act requirements.
Geology & Source: Reservoir supply from the Catskill–Delaware watershed system via the New York City Department of Environmental Protection (NYC DEP) — the New York County Manhattan upper west side Manhattan Valley neighborhood (NYC DEP Catskill–Delaware supply zone — Manhattan distribution grid; upper Manhattan west side distribution infrastructure); moderately hard supply at 107.5 mg/L — reflecting NYC DEP distribution in the Manhattan Valley upper west Manhattan zone.