Arrochar Water Hardness & Quality Report (2026)
Water Hardness
7.8 grains per gallon
Source
reservoir
pH Level
7.9
neutral = 7.0
Lead
0.006 mg/L
✓ Below action level
TDS
299.5 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 Arrochar, your appliances are currently losing 18% efficiency due to mineral buildup.
| Appliance | In Arrochar | 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 Arrochar compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Arrochar, New York | 134 mg/L | 6.5 ppt | 🟠 Hard | reservoir |
| Emerson Hill, New York | 83.5 mg/L | 4.1 ppt | 🟡 Moderately Hard | reservoir |
| Fort Hamilton, New York | 132.5 mg/L | 6.4 ppt | 🟠 Hard | reservoir |
| Dyker Heights, New York | 156.5 mg/L | 7.5 ppt | 🟠 Hard | reservoir |
| Bath Beach, New York | 167 mg/L | 8 ppt | 🟠 Hard | reservoir |
National Benchmark
How Arrochar compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Arrochar | 134 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Arrochar's Water Unique?
Local geology and source profile
Arrochar, New York, in Richmond County — a Richmond County neighborhood adjacent to St. George and New Dorp on Staten Island in New York — receives its water from NYC DEP, drawing from the Catskill and Delaware reservoir system (Richmond County) through the New York City distribution.
The hard 134 mg/L hardness and TDS of 299.5 mg/L are notably harder than the typical NYC DEP supply delivered to Manhattan and Brooklyn (typically ~60-80 mg/L) — reflecting Staten Island's position at the end of the NYC distribution system where greater residence time and local geological contributions from the Cambrian Wappinger Limestone outcrop area compound the hardness. The Catskill-Delaware watershed at Richmond County — Devonian Catskill Formation (insoluble — primary dilutant from upper watershed), Cambrian Wappinger Limestone (calcareous — hardness contributor from lower distribution contacts), and Quaternary glacial drift (slightly calcareous — TDS contributor).
At 134 mg/L with TDS 300, Arrochar's water is hard — scale builds in kettles and appliances over months, dishwashers benefit from rinse aid, and faucet aerators need periodic cleaning. Quarterly descaling is appropriate. The PFAS level of 6.5 ppt warrants a certified drinking water filter — the Richmond County Staten Island industrial corridor and former military sites contribute to Arrochar's elevated PFAS readings.
Geology & Source: Arrochar in Richmond County draws from NYC DEP on the Catskill and Delaware reservoir system (Richmond County, Staten Island, New York) — the Catskill-Delaware watershed drains Devonian Catskill Formation (insoluble) and Cambrian Wappinger Limestone (calcareous) — New York Richmond County NYC DEP Catskill-Delaware Devonian-Cambrian supply produces hard water at 134 mg/L with TDS 299.5 mg/L.