North Kingstown Water Hardness & Quality Report (2026)
Water Hardness
3.5 grains per gallon
Source
reservoir
pH Level
7.5
neutral = 7.0
Lead
0.006 mg/L
✓ Below action level
TDS
138.1 mg/L
Est. Daily Cost
$0.16
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 North Kingstown, your appliances are currently losing 8% efficiency due to mineral buildup.
| Appliance | In North Kingstown | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.6 yrs | 8.5 yrs | -11% |
| Washing Machine | 11.4 yrs | 12 yrs | -5% |
| Water Heater | 13.2 yrs | 15 yrs | -12% |
Regional Water Comparison
How North Kingstown compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ North Kingstown, Rhode Island | 59.5 mg/L | 8.4 ppt | 🟢 Soft | reservoir |
| Narragansett, Rhode Island | 55 mg/L | 7.9 ppt | 🟢 Soft | reservoir |
| East Greenwich, Rhode Island | 79 mg/L | 10.4 ppt | 🟡 Moderately Hard | reservoir |
| South Kingstown, Rhode Island | 70.5 mg/L | 9.5 ppt | 🟡 Moderately Hard | reservoir |
| West Warwick, Rhode Island | 43.5 mg/L | 6.8 ppt | 🟢 Soft | reservoir |
National Benchmark
How North Kingstown compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ North Kingstown | 59.5 mg/L | 🟢 None |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes North Kingstown's Water Unique?
Local geology and source profile
North Kingstown, Rhode Island, in Washington County — a major south Rhode Island suburban community (North Kingstown is a significant Washington County town — a south Rhode Island community adjacent to Wickford Village on the west shore of Narragansett Bay; North Kingstown is known for its beautiful colonial-era Wickford Village (one of the most picturesque and best-preserved colonial harbor villages in New England — Wickford has a charming 18th and 19th century downtown, art galleries, and harbor waterfront that has made it a tourist destination), home of Quonset Point–Davisville (one of the most important industrial and logistics parks in Rhode Island — former Naval Air Station Quonset Point; the Quonset Business Park is one of the most significant economic development projects in Rhode Island, featuring manufacturing, distribution, and port facilities), a diverse Washington County community with a primarily professional, naval/defense, and suburban family population, adjacent to Narragansett in the south Washington County Narragansett Bay corridor — draws its municipal water supply via the North Kingstown Water Division. Water hardness in North Kingstown measures 59.5 mg/L — classified as moderately soft.
North Kingstown's moderate softness reflects the south Rhode Island Washington County glacial outwash aquifer's calcareous-poor character. The Hunt–Annaquatucket–Pettaquamscutt aquifer draws from Quaternary calcareous-poor glacial outwash (calcareous-poor). North Kingstown Water Division produces the moderately soft 59.5 mg/L.
With hardness at 59.5 mg/L, North Kingstown residents enjoy moderately soft water. North Kingstown Water Division consistently delivers water meeting all Rhode Island DEM and EPA Safe Drinking Water Act requirements.
Geology & Source: Groundwater from the Hunt–Annaquatucket–Pettaquamscutt aquifer system via the North Kingstown Water Division — the Washington County south Rhode Island Narragansett Bay suburban North Kingstown corridor (Precambrian calcareous-poor Rhode Island gneiss and Quaternary calcareous-poor glacial outwash — the extremely calcareous-poor south Rhode Island crystalline watershed; effective treatment); moderately soft supply at 59.5 mg/L in Washington County.