Northbridge Water Hardness & Quality Report (2026)
Water Hardness
1.1 grains per gallon
Source
reservoir
pH Level
7.1
neutral = 7.0
Lead
0.001 mg/L
✓ Below action level
TDS
29.6 mg/L
Est. Daily Cost
$0.05
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 Northbridge, your appliances are currently losing 3% efficiency due to mineral buildup.
| Appliance | In Northbridge | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 9 yrs | 8.5 yrs | — |
| Washing Machine | 12.9 yrs | 12 yrs | — |
| Water Heater | 14.8 yrs | 15 yrs | -1% |
Regional Water Comparison
How Northbridge compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Northbridge, Massachusetts | 19.5 mg/L | 4.4 ppt | 🟢 Soft | reservoir |
| Grafton, Massachusetts | 124 mg/L | 11.7 ppt | 🟠 Hard | reservoir |
| Uxbridge, Massachusetts | 28 mg/L | 5.1 ppt | 🟢 Soft | reservoir |
| Millbury, Massachusetts | 54.5 mg/L | 6.9 ppt | 🟢 Soft | reservoir |
| Milford, Massachusetts | 48 mg/L | 6.4 ppt | 🟢 Soft | reservoir |
National Benchmark
How Northbridge compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Northbridge | 19.5 mg/L | 🟢 None |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Northbridge's Water Unique?
Local geology and source profile
Northbridge, Massachusetts, in Worcester County — a Worcester County town adjacent to Whitinsville and Uxbridge in south-central Massachusetts — receives its water from the Northbridge Water Department, drawing from Whitins Reservoir (Worcester County) through the south-central Massachusetts distribution.
The very soft 19.5 mg/L hardness and extremely low TDS of 29.6 mg/L are among the softest water supplies in Massachusetts — consistent with other south-central Worcester County granite reservoir communities drawing from the highly insoluble Milford Granite watershed. The Whitins Reservoir watershed at Worcester County drains the Eastern New England Upland — Precambrian Milford Granite (insoluble — primary dilutant), Precambrian Northbridge Gneiss (insoluble), and minor Cambrian metamorphic formations (very slightly calcareous — negligible hardness contributor).
At 19.5 mg/L, Northbridge's water is very soft — essentially no scale forms, dishwashers require minimal detergent, and appliances stay virtually scale-free indefinitely. No descaling is needed. The PFAS level of 4.4 ppt warrants a certified drinking water filter — the Worcester County south-central Massachusetts industrial corridor and nearby textile mill legacy sites contribute to Northbridge's readings despite the excellent water softness.
Geology & Source: Northbridge in Worcester County draws from the Northbridge Water Department on Whitins Reservoir (Worcester County, south-central Massachusetts) — the reservoir drains the Eastern New England Upland (Precambrian Milford Granite — insoluble) and Cambrian metamorphic formations — Massachusetts Worcester County Eastern New England Upland Precambrian granite reservoir produces very soft water at 19.5 mg/L with TDS 29.6 mg/L.