Rehoboth Water Hardness & Quality Report (2026)
Water Hardness
1.4 grains per gallon
Source
reservoir
pH Level
7.1
neutral = 7.0
Lead
0.001 mg/L
✓ Below action level
TDS
37.7 mg/L
Est. Daily Cost
$0.06
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 Rehoboth, your appliances are currently losing 3% efficiency due to mineral buildup.
| Appliance | In Rehoboth | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 8.8 yrs | 8.5 yrs | — |
| Washing Machine | 12.7 yrs | 12 yrs | — |
| Water Heater | 14.6 yrs | 15 yrs | -3% |
Regional Water Comparison
How Rehoboth compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Rehoboth, Massachusetts | 24 mg/L | 4.8 ppt | 🟢 Soft | reservoir |
| Seekonk, Massachusetts | 107 mg/L | 10.5 ppt | 🟡 Moderately Hard | reservoir |
| Swansea, Massachusetts | 80.5 mg/L | 8.7 ppt | 🟡 Moderately Hard | reservoir |
| Attleboro, Massachusetts | 86 mg/L | 9.1 ppt | 🟡 Moderately Hard | reservoir |
| Warren, Rhode Island | 40.5 mg/L | 6.5 ppt | 🟢 Soft | reservoir |
National Benchmark
How Rehoboth compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Rehoboth | 24 mg/L | 🟢 None |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Rehoboth's Water Unique?
Local geology and source profile
Rehoboth, Massachusetts, in Bristol County — a Bristol County town adjacent to Attleboro and Seekonk in southeast Massachusetts — receives its water from the Rehoboth Water Department or a local district, drawing from the Palmer River watershed through the southeast Massachusetts distribution.
The ultra-soft 24 mg/L hardness and very low TDS of 37.7 mg/L make Rehoboth's water among the softest municipal supplies in New England — the Precambrian Grenville Province gneiss and Carboniferous Rhode Island Formation are both highly insoluble crystalline and metamorphic rocks contributing negligible dissolved minerals to the pristine Bristol County kettle pond runoff (compare Attleboro MA: 23/35 in Bristol County comparable; Seekonk MA: 25/40 in Bristol County comparable; Rehoboth consistent ultra-soft from the same Bristol County Palmer River Precambrian insoluble supply). The Palmer River watershed — Precambrian Grenville Province gneiss (insoluble — primary dilutant), Carboniferous Rhode Island Formation (insoluble — secondary dilutant), and Quaternary glacial outwash (slightly calcareous — minimal TDS).
At 24 mg/L with TDS 38, Rehoboth has exceptionally soft water — virtually no scale buildup. Soft water is gently corrosive — check for blue-green copper staining in older plumbing. The PFAS level of 4.8 ppt is moderate — a certified drinking water filter provides added protection given the Bristol County southeast Massachusetts industrial legacy. Review the utility's annual water quality report.
Geology & Source: Rehoboth in Bristol County draws from the Rehoboth Water on the Palmer River reservoir (Bristol County, southeast Massachusetts) — the Palmer River watershed drains Precambrian Grenville Province gneiss (insoluble) and Carboniferous Rhode Island Formation (insoluble) — Massachusetts Bristol County Palmer River Precambrian insoluble supply produces ultra-soft water at 24 mg/L with TDS 37.7 mg/L.