New Fairfield Water Hardness & Quality Report (2026)
Water Hardness
4.8 grains per gallon
Source
reservoir
pH Level
7.7
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
194.4 mg/L
Est. Daily Cost
$0.22
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 New Fairfield, your appliances are currently losing 11% efficiency due to mineral buildup.
| Appliance | In New Fairfield | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.9 yrs | 8.5 yrs | -19% |
| Washing Machine | 10.6 yrs | 12 yrs | -12% |
| Water Heater | 12.3 yrs | 15 yrs | -18% |
Regional Water Comparison
How New Fairfield compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ New Fairfield, Connecticut | 81.5 mg/L | 10.3 ppt | 🟡 Moderately Hard | reservoir |
| Danbury, Connecticut | 17.5 mg/L | 4.8 ppt | 🟢 Soft | reservoir |
| Southbury, Connecticut | 41.5 mg/L | 6.8 ppt | 🟢 Soft | reservoir |
| Wilton, Connecticut | 39 mg/L | 6.6 ppt | 🟢 Soft | reservoir |
| New Canaan, Connecticut | 80.5 mg/L | 10.2 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How New Fairfield compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ New Fairfield | 81.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes New Fairfield's Water Unique?
Local geology and source profile
New Fairfield, Connecticut, in Fairfield County — a Fairfield County town adjacent to Danbury and Sherman on Candlewood Lake in northwest Connecticut — receives its water from local New Fairfield utilities or Danbury area water systems, drawing from Candlewood Lake or local reservoirs (Fairfield County) through the northwest Connecticut distribution.
The moderately hard 81.5 mg/L hardness and TDS of 194.4 mg/L reflect the northwest Connecticut New England Highlands supply's moderate crystalline character — driven by the Precambrian gneiss watershed with limited calcareous formation dissolution, though slightly harder than the purest New England granite supplies due to minor Cambrian marble contributions. The New Fairfield-Candlewood Lake watershed drains the New England Highlands — Precambrian Gneiss and Schist (insoluble — primary dilutant), Cambrian marble formations (calcareous — primary hardness contributor), and Pleistocene calcareous glacial till (slightly calcareous).
At 81.5 mg/L, New Fairfield's water is moderately hard — light scale forms slowly in appliances, dishwashers benefit from rinse aid, and faucet aerators need occasional cleaning. Semi-annual descaling is appropriate. The PFAS level of 10.3 ppt warrants a certified reverse osmosis drinking water filter — Sikorsky Memorial Airport (Fairfield County — AFFF) and the northwest Connecticut industrial corridor contribute to New Fairfield's elevated readings.
Geology & Source: New Fairfield in Western Connecticut Planning Region draws from local reservoirs or the South Central Connecticut Regional Water Authority on Candlewood Lake (Fairfield County area, northwest Connecticut) — the watershed drains the New England Highlands (Precambrian gneiss — insoluble) and Cambrian marble formations — Connecticut Fairfield County New England Highlands Precambrian gneiss reservoir produces moderately hard water at 81.5 mg/L with TDS 194.4 mg/L.