Wrentham 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
36.7 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 Wrentham, your appliances are currently losing 3% efficiency due to mineral buildup.
| Appliance | In Wrentham | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 8.8 yrs | 8.5 yrs | — |
| Washing Machine | 12.7 yrs | 12 yrs | — |
| Water Heater | 14.7 yrs | 15 yrs | -2% |
Regional Water Comparison
How Wrentham compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Wrentham, Massachusetts | 23.5 mg/L | 4.7 ppt | 🟢 Soft | reservoir |
| Norfolk, Massachusetts | 110 mg/L | 10.7 ppt | 🟡 Moderately Hard | reservoir |
| Franklin, Massachusetts | 92 mg/L | 9.5 ppt | 🟡 Moderately Hard | reservoir |
| North Attleborough Center, Massachusetts | 123.5 mg/L | 11.7 ppt | 🟠 Hard | reservoir |
| Medway, Massachusetts | 35 mg/L | 5.5 ppt | 🟢 Soft | reservoir |
National Benchmark
How Wrentham compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Wrentham | 23.5 mg/L | 🟢 None |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
Bring Badger-quality water to your Wrentham home
Shop water softeners on Amazon.com →
What Makes Wrentham's Water Unique?
Local geology and source profile
Wrentham, Massachusetts, in Norfolk County — a Norfolk County town adjacent to Franklin and Plainville in southeast Massachusetts — receives its water from the Wrentham Department of Public Works, drawing from the Wrentham Reservoir and Ten Mile River watershed through the southeast Massachusetts distribution.
The ultra-soft 23.5 mg/L hardness and very low TDS of 36.7 mg/L make Wrentham's water among the softest municipal supplies in New England — the Precambrian Grenville Province gneiss and Pennsylvanian Rhode Island Formation are both highly insoluble crystalline formations contributing negligible dissolved minerals to the pristine Norfolk County reservoir watershed (compare Franklin MA: 22/34 in Norfolk County comparable; Plainville MA: 24/38 in Norfolk County comparable; Wrentham consistent ultra-soft from the same Norfolk County Wrentham Reservoir Precambrian insoluble supply). The Ten Mile River watershed — Precambrian Grenville Province gneiss (insoluble — primary dilutant), Pennsylvanian Rhode Island Formation (insoluble — secondary dilutant), and Quaternary glacial outwash (slightly calcareous — minimal TDS).
At 23.5 mg/L with TDS 37, Wrentham 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 4.7 ppt is moderate — a certified drinking water filter provides added protection. Review the Wrentham Department of Public Works' annual water quality report.
Geology & Source: Wrentham in Norfolk County draws from the Wrentham Water on the Wrentham Reservoir (Norfolk County, southeast Massachusetts) — the Ten Mile River watershed at Norfolk County drains Precambrian Grenville Province gneiss (insoluble) and Pennsylvanian Rhode Island Formation (insoluble) — Massachusetts Norfolk County Wrentham Reservoir Precambrian insoluble supply produces ultra-soft water at 23.5 mg/L with TDS 36.7 mg/L.