Graniteville Water Hardness & Quality Report (2026)
Water Hardness
4.6 grains per gallon
Source
reservoir
pH Level
7.5
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
131.5 mg/L
Est. Daily Cost
$0.21
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 Graniteville, your appliances are currently losing 11% efficiency due to mineral buildup.
| Appliance | In Graniteville | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7 yrs | 8.5 yrs | -18% |
| Washing Machine | 10.7 yrs | 12 yrs | -11% |
| Water Heater | 12.4 yrs | 15 yrs | -17% |
Regional Water Comparison
How Graniteville compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Graniteville, New York | 79 mg/L | 3.9 ppt | 🟡 Moderately Hard | reservoir |
| Port Richmond, New York | 82.5 mg/L | 4.1 ppt | 🟡 Moderately Hard | reservoir |
| Mariners Harbor, New York | 160 mg/L | 7.7 ppt | 🟠 Hard | reservoir |
| New Springville, New York | 158.5 mg/L | 7.6 ppt | 🟠 Hard | reservoir |
| Emerson Hill, New York | 83.5 mg/L | 4.1 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How Graniteville compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Graniteville | 79 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Graniteville's Water Unique?
Local geology and source profile
Graniteville, New York, in Richmond County — a Richmond County (Staten Island) neighborhood adjacent to Port Richmond and Meiers Corners in central Staten Island — receives its water from New York City DEP, drawing from the Catskill-Delaware system through the NYC water distribution network to Staten Island.
The moderately soft 79 mg/L hardness and TDS of 131.5 mg/L are consistent with other NYCDEP Catskill-Delaware-served Staten Island communities (Emerson Hill: 83.5 mg/L; Port Richmond: 82.5 mg/L) — reflecting the uniform NYC water supply character. The NYC water from the Catskill-Delaware system drains the Catskill Mountains — Devonian Catskill Formation red sandstone (insoluble — primary catchment rock), Devonian Hamilton Formation (slightly calcareous shale — minimal hardness contributor), and Devonian Onondaga Limestone (trace calcareous — Delaware watershed margins).
At 79 mg/L, Graniteville's water is moderately soft — light scale forms slowly in appliances, dishwashers remain efficient, and bathroom fixtures need occasional cleaning. Semi-annual descaling is appropriate. The PFAS level of 3.9 ppt warrants a certified drinking water filter — the Richmond County Staten Island industrial waterfront corridor, the Arthur Kill petrochemical complex, and the NYC harbor PFAS background contribute to Graniteville's readings.
Geology & Source: Graniteville in Richmond County draws from New York City DEP on the Catskill-Delaware watershed (Richmond County, Staten Island) — the Catskill-Delaware delivers Devonian Catskill Formation sandstone (insoluble) snowmelt — New York Richmond County NYCDEP Catskill-Delaware watershed produces moderately soft water at 79 mg/L with TDS 131.5 mg/L in this Staten Island New York neighborhood.