Canton Water Hardness & Quality Report (2026)
Water Hardness
5.6 grains per gallon
Source
reservoir
pH Level
7.8
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
228 mg/L
Est. Daily Cost
$0.26
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 Canton, your appliances are currently losing 13% efficiency due to mineral buildup.
| Appliance | In Canton | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.4 yrs | 8.5 yrs | -25% |
| Washing Machine | 10 yrs | 12 yrs | -17% |
| Water Heater | 11.8 yrs | 15 yrs | -21% |
Regional Water Comparison
How Canton compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Canton, Massachusetts | 96 mg/L | 9.8 ppt | 🟡 Moderately Hard | reservoir |
| Stoughton, Massachusetts | 69 mg/L | 7.9 ppt | 🟡 Moderately Hard | reservoir |
| Norwood, Massachusetts | 23.5 mg/L | 4.7 ppt | 🟢 Soft | reservoir |
| Dedham, Massachusetts | 90.5 mg/L | 9.4 ppt | 🟡 Moderately Hard | reservoir |
| Westwood, Massachusetts | 91 mg/L | 9.4 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How Canton compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Canton | 96 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Canton's Water Unique?
Local geology and source profile
Canton, Massachusetts, in Norfolk County — a southern suburban Boston community in the Blue Hills-Neponset River corridor, home to the historic Revere Sugar and Robert Ames mills, the Canton Junction commuter rail stop, and the iconic Blue Hills Reservoir — receives its municipal water from the Canton Water Division or supplementally through the MWRA (Massachusetts Water Resources Authority) system, drawing from Ponkapoag Pond in the Blue Hills Reservation or local Norfolk County reservoir impoundments in the Neponset River watershed.
The moderately soft 96 mg/L hardness and TDS of 228 mg/L reflect the Blue Hills-Neponset watershed's Avalonian crystalline rock character. Canton's reservoirs drain the Blue Hills — an erosion-resistant massif of Precambrian Dedham Granite (a coarse-grained Proterozoic Avalonian granite that forms the Blue Hills' ridges) and related Avalonian metamorphic and igneous basement rocks of the Boston Basin. These Proterozoic crystalline rocks have very limited carbonate content, producing characteristically soft source water. The moderately soft reading (96 mg/L) reflects some dissolved mineral contributions from glacial till soils overlying the granite in the Canton watershed, slightly harder than the purest New Hampshire or Rhode Island granite supplies.
At 96 mg/L, Canton's water is moderately soft — comfortable for all household uses. Scale forms slowly over many months, soap lathers well, and the dishwasher produces clean results. Semi-annual descaling of heating appliances is adequate. The PFAS level of 9.8 ppt is strikingly high for a New England suburban community and warrants a certified drinking water filter — Canton's location along the Route 128 technology corridor, proximity to major MWRA metropolitan watershed with industrial input, the Neponset River's legacy industrial contamination (former rubber and chemicals manufacturing), and the Norfolk County suburban corridor's PFAS sources contribute to this elevated reading.
Geology & Source: Canton in Norfolk County draws from the Canton Water Division or MWRA on local Ponkapoag Pond or Blue Hills Reservoir impoundments — the Neponset River-Blue Hills watershed drains the Blue Hills and Norfolk County upland (Precambrian Dedham Granite and Avalonian crystalline terrain) with minor carbonate — Avalonian granite watershed drainage produces moderately soft water at 96 mg/L with TDS 228 mg/L in this Norfolk County Boston suburb.