Auburn Water Hardness & Quality Report (2026)
Water Hardness
5.1 grains per gallon
Source
reservoir
pH Level
7.7
neutral = 7.0
Lead
0.006 mg/L
✓ Below action level
TDS
197.9 mg/L
Est. Daily Cost
$0.23
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 Auburn, your appliances are currently losing 12% efficiency due to mineral buildup.
| Appliance | In Auburn | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.7 yrs | 8.5 yrs | -21% |
| Washing Machine | 10.4 yrs | 12 yrs | -13% |
| Water Heater | 12.1 yrs | 15 yrs | -19% |
Regional Water Comparison
How Auburn compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Auburn, Massachusetts | 87 mg/L | 9.1 ppt | 🟡 Moderately Hard | reservoir |
| Millbury, Massachusetts | 54.5 mg/L | 6.9 ppt | 🟢 Soft | reservoir |
| Worcester, Massachusetts | 20 mg/L | 4.5 ppt | 🟢 Soft | reservoir |
| Charlton, Massachusetts | 121 mg/L | 11.5 ppt | 🟠 Hard | reservoir |
| Grafton, Massachusetts | 124 mg/L | 11.7 ppt | 🟠 Hard | reservoir |
National Benchmark
How Auburn compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Auburn | 87 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Auburn's Water Unique?
Local geology and source profile
Auburn, Massachusetts, in Worcester County — a Worcester County town adjacent to Worcester and Oxford in central Massachusetts — receives its municipal water from MWRA (Massachusetts Water Resources Authority) or the Auburn Water District, drawing from Wachusett Reservoir (Worcester County) on the Still River and Quinapoxet River tributaries.
The moderately soft 87 mg/L hardness and TDS of 197.9 mg/L reflect the Wachusett Reservoir MWRA supply's central Massachusetts character — similar to Holden (83 mg/L, same Wachusett zone). The Wachusett Reservoir drains the Central Massachusetts Upland — Precambrian Milford Granite (insoluble crystalline), Devonian Framingham Gneiss (insoluble), and minor Proterozoic metasedimentary rocks. The predominantly insoluble granite-gneiss basement produces the moderately soft MWRA Wachusett supply, consistent across the Worcester County MWRA service zone.
At 87 mg/L, Auburn's water is moderately soft — light scale forms slowly in appliances, dishwashers remain efficient, and bathroom fixtures need occasional cleaning. Semi-annual descaling is appropriate. The PFAS level of 9.1 ppt warrants a certified reverse osmosis drinking water filter — Hanscom Air Force Base (Middlesex County AFFF — in the MWRA Wachusett watershed drainage), the Worcester south suburban industrial corridor, and the central Massachusetts PFAS background contribute to Auburn's very elevated PFAS readings.
Geology & Source: Auburn in Worcester County draws from MWRA on Wachusett Reservoir (Worcester County, central Massachusetts) — Wachusett drains the Central Massachusetts Upland (Precambrian Milford Granite, Devonian Framingham Gneiss — insoluble crystalline) — Massachusetts Worcester County MWRA Wachusett Precambrian crystalline watershed produces moderately soft water at 87 mg/L with TDS 197.9 mg/L in this Worcester County Massachusetts town.