Kingston Water Hardness & Quality Report (2026)
Water Hardness
2.8 grains per gallon
Source
reservoir
pH Level
7.3
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
88.3 mg/L
Est. Daily Cost
$0.13
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 Kingston, your appliances are currently losing 6% efficiency due to mineral buildup.
| Appliance | In Kingston | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 8 yrs | 8.5 yrs | -6% |
| Washing Machine | 11.8 yrs | 12 yrs | -2% |
| Water Heater | 13.7 yrs | 15 yrs | -9% |
Regional Water Comparison
How Kingston compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Kingston, Massachusetts | 48 mg/L | 6.4 ppt | 🟢 Soft | reservoir |
| Duxbury, Massachusetts | 113 mg/L | 11 ppt | 🟡 Moderately Hard | reservoir |
| Carver, Massachusetts | 103 mg/L | 10.3 ppt | 🟡 Moderately Hard | reservoir |
| Hanover, Massachusetts | 49.5 mg/L | 6.5 ppt | 🟢 Soft | reservoir |
| Hanson, Massachusetts | 49 mg/L | 6.5 ppt | 🟢 Soft | reservoir |
National Benchmark
How Kingston compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Kingston | 48 mg/L | 🟢 None |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Kingston's Water Unique?
Local geology and source profile
Kingston, Massachusetts, in Plymouth County — a Plymouth County town adjacent to Plymouth and Duxbury on Silver Lake in southeast Massachusetts — receives its water from the Town of Kingston Water, drawing from the Silver Lake reservoir (Plymouth County) through the southeast Massachusetts distribution.
The very soft 48 mg/L hardness and low TDS of 88.3 mg/L reflect the southeast Massachusetts Plymouth County supply's very soft granite character — the Precambrian Milford Granite and Cambrian Braintree Formation contribute insoluble dilution with minimal calcareous contact, typical of the southeast Massachusetts Plymouth County coastal watershed communities (compare Uxbridge MA: 28/45 in Worcester County softer from the Blackstone supply; Kingston softer than the MWRA metro communities; Bedford MA: 118.5/311.7 in Middlesex County much harder). The Silver Lake watershed at Plymouth County — Precambrian Milford Granite (insoluble — primary dilutant), Cambrian Braintree Formation (insoluble — secondary dilutant), and Quaternary Plymouth outwash (slightly calcareous — minor TDS).
At 48 mg/L, Kingston's water is very soft — scale forms very slowly in appliances, dishwashers remain efficient, and no softening is needed. Annual descaling is appropriate. The PFAS level of 6.4 ppt warrants a certified drinking water filter — the Plymouth County southeast Massachusetts industrial corridor contribute to Kingston's elevated readings.
Geology & Source: Kingston in Plymouth County is served by Town of Kingston Water drawing from Silver Lake — the Silver Lake watershed drains Precambrian Milford Granite (insoluble) and Cambrian Braintree Formation (insoluble) — MA Plymouth County Silver Lake Precambrian insoluble granite supply produces very soft water at 48 mg/L with TDS 88.3 mg/L.