Montville Center Water Hardness & Quality Report (2026)
Water Hardness
3.8 grains per gallon
Source
reservoir
pH Level
7.5
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
142.3 mg/L
Est. Daily Cost
$0.17
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 Montville Center, your appliances are currently losing 9% efficiency due to mineral buildup.
| Appliance | In Montville Center | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.4 yrs | 8.5 yrs | -13% |
| Washing Machine | 11.2 yrs | 12 yrs | -7% |
| Water Heater | 13 yrs | 15 yrs | -13% |
Regional Water Comparison
How Montville Center compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Montville Center, Connecticut | 65.5 mg/L | 8.9 ppt | 🟡 Moderately Hard | reservoir |
| Norwich, Connecticut | 98.5 mg/L | 11.8 ppt | 🟡 Moderately Hard | reservoir |
| New London, Connecticut | 83.5 mg/L | 10.5 ppt | 🟡 Moderately Hard | reservoir |
| Waterford, Connecticut | 77.5 mg/L | 10 ppt | 🟡 Moderately Hard | reservoir |
| Ledyard, Connecticut | 22 mg/L | 5.2 ppt | 🟢 Soft | reservoir |
National Benchmark
How Montville Center compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Montville Center | 65.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Montville Center's Water Unique?
Local geology and source profile
Montville Center, Connecticut, in the Southeastern Connecticut Planning Region — a Montville township community adjacent to Norwich and the Thames River valley, home of the Mohegan Sun casino complex (on Mohegan Tribal land along the Thames River) — receives its municipal water from the Montville Water Company or the Norwich Public Utilities Water Division, which draws from local reservoir impoundments in the Thames River watershed or the Norwich reservoir system in southeastern Connecticut.
The moderately soft 65.5 mg/L hardness and TDS of 142.3 mg/L reflect the Thames River watershed's classic New England crystalline basement geology. The Thames River and its tributaries (the Yantic River, Shetucket River, Quinebaug River) drain the Connecticut Eastern Highlands (inland Connecticut's Precambrian and Paleozoic gneiss, granodiorite, and Carboniferous granite), producing the characteristically soft, low-mineral water typical of New England river-reservoir systems. The Thames watershed terrain is predominantly crystalline metamorphic rock with essentially no carbonate formations, producing soft water throughout southeastern Connecticut.
At 65.5 mg/L, Montville Center's water is moderately soft — comfortable for household use. Scale forms slowly over many months, soap lathers well, and appliances operate efficiently. Semi-annual descaling is adequate. The PFAS level of 8.9 ppt is very high for soft New England water and warrants a certified reverse osmosis drinking water filter — the US Navy Submarine Base New London (Groton, CT — the US Navy's Atlantic submarine force home port, a significant AFFF user on the Thames River), Pratt & Whitney (jet engine testing in the Thames watershed), and the southeastern Connecticut military-defense industrial complex contribute to Montville's elevated PFAS readings.
Geology & Source: Montville Center in southeastern Connecticut draws from the Montville Water Company or Norwich Water Department on local reservoirs in the Thames River watershed — the Thames River system drains the Connecticut Eastern Highlands (Precambrian and Paleozoic gneiss and granite) — Connecticut crystalline New England watershed drainage produces moderately soft water at 65.5 mg/L with TDS 142 mg/L in this southeastern Connecticut community.