East Greenwich Water Hardness & Quality Report (2026)
Water Hardness
4.6 grains per gallon
Source
reservoir
pH Level
7.8
neutral = 7.0
Lead
0.009 mg/L
✓ Below action level
TDS
212.2 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 East Greenwich, your appliances are currently losing 11% efficiency due to mineral buildup.
| Appliance | In East Greenwich | 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 East Greenwich compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ East Greenwich, Rhode Island | 79 mg/L | 10.4 ppt | 🟡 Moderately Hard | reservoir |
| Warwick, Rhode Island | 40.5 mg/L | 6.5 ppt | 🟢 Soft | reservoir |
| West Warwick, Rhode Island | 43.5 mg/L | 6.8 ppt | 🟢 Soft | reservoir |
| North Kingstown, Rhode Island | 59.5 mg/L | 8.4 ppt | 🟢 Soft | reservoir |
| Cranston, Rhode Island | 73.5 mg/L | 9.8 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How East Greenwich compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ East Greenwich | 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 East Greenwich's Water Unique?
Local geology and source profile
East Greenwich, Rhode Island, in Kent County — a Kent County town adjacent to Warwick and Coventry in central Rhode Island — receives its water from the Rhode Island Water Resources Board, drawing from the Scituate Reservoir (Kent County) through the central Rhode Island distribution.
The moderately soft 79 mg/L hardness and TDS of 212.2 mg/L (TDS somewhat elevated relative to hardness — reflecting the Rhode Island water system's dissolved solids from the distribution network and treatment) reflect the central Rhode Island Kent County supply's soft character — driven by the Precambrian Esmond Granite and Permian Narragansett Basin metamorphics that yield very limited calcareous dissolution, typical of the Rhode Island Uplands water supply. The Scituate Reservoir at Kent County — Precambrian Esmond Granite (insoluble — primary dilutant), Precambrian Narragansett Basin metamorphics (insoluble — dilutant), and Cambrian calcareous formations (slightly calcareous — trace hardness contributor).
At 79 mg/L, East Greenwich'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 10.4 ppt warrants a certified reverse osmosis drinking water filter — Quonset Point/Davisville (Providence County — former naval AFFF) and the Rhode Island industrial corridor contribute significantly to East Greenwich's very elevated readings.
Geology & Source: East Greenwich in Kent County draws from the Rhode Island Water Resources Board on the Scituate Reservoir (Kent County, central Rhode Island) — the Scituate Reservoir drains the Rhode Island Uplands (Precambrian Esmond Granite — insoluble) with minor Cambrian calcareous formations — Rhode Island Kent County Scituate Reservoir Precambrian crystalline supply produces moderately soft water at 79 mg/L with TDS 212.2 mg/L.