Narragansett Water Hardness & Quality Report (2026)
Water Hardness
3.2 grains per gallon
Source
reservoir
pH Level
7.5
neutral = 7.0
Lead
0.006 mg/L
✓ Below action level
TDS
123.4 mg/L
Est. Daily Cost
$0.15
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 Narragansett, your appliances are currently losing 7% efficiency due to mineral buildup.
| Appliance | In Narragansett | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.8 yrs | 8.5 yrs | -8% |
| Washing Machine | 11.6 yrs | 12 yrs | -3% |
| Water Heater | 13.4 yrs | 15 yrs | -11% |
Regional Water Comparison
How Narragansett compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Narragansett, Rhode Island | 55 mg/L | 7.9 ppt | 🟢 Soft | reservoir |
| South Kingstown, Rhode Island | 70.5 mg/L | 9.5 ppt | 🟡 Moderately Hard | reservoir |
| North Kingstown, Rhode Island | 59.5 mg/L | 8.4 ppt | 🟢 Soft | reservoir |
| Newport, Rhode Island | 57.5 mg/L | 8.2 ppt | 🟢 Soft | reservoir |
| Middletown, Rhode Island | 51.5 mg/L | 7.6 ppt | 🟢 Soft | reservoir |
National Benchmark
How Narragansett compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Narragansett | 55 mg/L | 🟢 None |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Narragansett's Water Unique?
Local geology and source profile
Narragansett, Rhode Island, in Washington County — a Washington County town adjacent to South Kingstown and Newport on Narragansett Bay in south Rhode Island — receives its municipal water from the Narragansett Water Division, drawing from local reservoir sources (Washington County) through the south Rhode Island water treatment system.
The moderately soft 55 mg/L hardness and TDS of 123.4 mg/L reflect the south Rhode Island New England Upland's insoluble crystalline basement. The Washington County watershed drains the New England Upland — Precambrian Westerly Granite (insoluble), Permian Narragansett Basin siliceous sedimentary (coal measure — insoluble), and Precambrian Esmond-Dedham terrane gneiss (insoluble). The predominantly insoluble granite and Permian siliceous geology produces the moderately soft south Rhode Island supply.
At 55 mg/L, Narragansett'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 7.9 ppt warrants a certified reverse osmosis drinking water filter — Naval Station Newport (Newport County — AFFF, the dominant south Rhode Island military PFAS source) and the Rhode Island coastal PFAS complex contribute to Narragansett's very elevated PFAS readings relative to its otherwise clean soft source water.
Geology & Source: Narragansett in Washington County draws from the Narragansett Water Division on local reservoirs (Washington County, south Rhode Island) — the watershed drains the New England Upland (Precambrian Westerly Granite, Permian Narragansett Basin siliceous — insoluble) — Rhode Island Washington County New England Upland crystalline watershed produces moderately soft water at 55 mg/L with TDS 123.4 mg/L in this Washington County Rhode Island town.