Willimantic Water Hardness & Quality Report (2026)
Water Hardness
2.2 grains per gallon
Source
reservoir
pH Level
7.3
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
66.5 mg/L
Est. Daily Cost
$0.10
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 Willimantic, your appliances are currently losing 5% efficiency due to mineral buildup.
| Appliance | In Willimantic | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 8.4 yrs | 8.5 yrs | -1% |
| Washing Machine | 12.2 yrs | 12 yrs | — |
| Water Heater | 14.1 yrs | 15 yrs | -6% |
Regional Water Comparison
How Willimantic compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Willimantic, Connecticut | 37 mg/L | 6.5 ppt | 🟢 Soft | reservoir |
| Windham, Connecticut | 40 mg/L | 6.7 ppt | 🟢 Soft | reservoir |
| Mansfield City, Connecticut | 41.5 mg/L | 6.9 ppt | 🟢 Soft | reservoir |
| Storrs, Connecticut | 56 mg/L | 8.1 ppt | 🟢 Soft | reservoir |
| Tolland, Connecticut | 73 mg/L | 9.6 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How Willimantic compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Willimantic | 37 mg/L | 🟢 None |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Willimantic's Water Unique?
Local geology and source profile
Willimantic, Connecticut, in Windham County — a Windham County city adjacent to Windham and Coventry on the Willimantic River in eastern Connecticut, a former major textile-manufacturing city and home of Eastern Connecticut State University — receives its municipal water from the Willimantic Water Division (part of Windham), drawing from local reservoirs or the Willimantic River watershed in Windham County.
The extremely soft 37 mg/L hardness and very low TDS of 66.5 mg/L reflect the eastern Connecticut Upland's insoluble crystalline geology. The Willimantic watershed drains the Eastern Connecticut Upland — Precambrian Sterling Granite and Quinebaug Formation (insoluble crystalline), Ordovician Tatnic Hill Formation (siliceous schist — insoluble), and Paleozoic Hope Valley Alaskite Gneiss (insoluble). The entirely insoluble crystalline terrane of eastern Connecticut produces the near-distilled soft water characteristic of all Windham County supplies.
At 37 mg/L, Willimantic's water is extremely soft — no scale ever forms, soap lathers maximally, and appliances achieve maximum lifespan. No descaling is needed. The PFAS level of 6.5 ppt warrants a certified drinking water filter — the Willimantic textile mill industrial legacy (PFAS in mill wastewater), Groton Naval Submarine Base (New London County — AFFF in the Thames-Willimantic watershed), and the eastern Connecticut industrial PFAS background contribute to Willimantic's elevated readings despite the pristine geology.
Geology & Source: Willimantic in Windham County draws from the Willimantic Water Division on Shenipsit Lake or the Willimantic River (Windham County, eastern Connecticut) — the Willimantic drains the Eastern Connecticut Upland (Precambrian Sterling Granite, Ordovician Tatnic Hill Formation schist) — Connecticut Windham County Precambrian crystalline watershed produces extremely soft water at 37 mg/L with very low TDS 66.5 mg/L in this Windham County Connecticut city.