Cromwell Water Hardness & Quality Report (2026)
Water Hardness
5.8 grains per gallon
Source
groundwater
pH Level
8
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
298 mg/L
Est. Daily Cost
$0.27
energy & soap waste
Source: See methodology section below · 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 Cromwell, your appliances are currently losing 13% efficiency due to mineral buildup.
| Appliance | In Cromwell | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.4 yrs | 8.5 yrs | -13% |
| Washing Machine | 10.4 yrs | 12 yrs | -13% |
| Water Heater | 13.1 yrs | 15 yrs | -13% |
Regional Water Comparison
How Cromwell compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Cromwell, Connecticut | 99.5 mg/L | 17.5 ppt | 🟡 Moderately Hard | groundwater |
| Middletown, Connecticut | ≈ 120–179 mg/L | 0 ppt | 🟠 Hard | reservoir |
| Wethersfield, Connecticut | ≈ 120–179 mg/L | 5.9 ppt | 🟠 Hard | groundwater |
| Glastonbury, Connecticut | ≈ 120–179 mg/L | 5 ppt | 🟠 Hard | groundwater |
| Newington, Connecticut | ≈ 0–60 mg/L | 10.8 ppt | 🟢 Soft | groundwater |
National Benchmark
How Cromwell compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Cromwell | 99.5 mg/L | 🟡 Low |
| USA National Avg | 151 mg/L | 🟠 Moderate |
| Scarsdale Top Rated | 0.02 mg/L | 🟢 None |
Bring Scarsdale-quality water to your Cromwell home
Shop water softeners on Amazon.com →
What Makes Cromwell's Water Unique?
Local geology and source profile
Cromwell, Connecticut, in Middlesex County — a Middlesex County town adjacent to Middletown and Rocky Hill on the Connecticut River in central Connecticut — receives its water from the Cromwell Water Division or Connecticut Water, drawing from the Connecticut River or local reservoirs (Middlesex County) through the central Connecticut distribution.
The moderately hard 99.5 mg/L hardness and TDS of 261.2 mg/L reflect the central Connecticut Middlesex County Connecticut Valley supply's moderate calcareous character — reflecting the Triassic Hartford Basin's slightly calcareous arkose sedimentary geology that provides moderate mineral dissolution, typical of the central Connecticut River Valley communities. The Connecticut River at Middlesex County — Triassic Hartford Arkose (slightly calcareous — primary hardness contributor), Jurassic trap rock (insoluble — dilutant), and Precambrian Eastern Highlands gneiss (insoluble — dilutant from upland tributaries).
At 99.5 mg/L, Cromwell'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 11.9 ppt warrants a certified reverse osmosis drinking water filter — Bradley International Airport (Hartford County — AFFF) and the central Connecticut industrial corridor contribute significantly to Cromwell's very elevated readings.
Geology & Source: Cromwell in Middlesex County draws from the Connecticut Water on the Connecticut River or local reservoirs (Middlesex County, central Connecticut) — the Connecticut River at Middlesex drains the Connecticut Valley (Triassic Hartford Arkose — slightly calcareous) and Precambrian Eastern Highlands metamorphics — Connecticut Middlesex County Connecticut Valley Triassic calcareous supply produces moderately hard water at 99.5 mg/L with TDS 261.2 mg/L.
Other Connecticut Water Reports
Report an Issue
Notice an error or missing data? Help us keep this page accurate. If you spot incorrect water hardness, outdated utility info, or missing details, please let us know.
All reports are reviewed by our team. Thank you for supporting data quality!
Frequently Asked Questions
Is Cromwell's water safe to drink?
Do I need a water softener in Cromwell?
How does Cromwell compare to the USA average?
Data Sources & Methodology
Water quality data for Cromwell is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.
Water Hardness
Modelled estimate based on state-level USGS geological survey data for this region. No direct USGS Water Quality Portal measurement was matched to this city — the value reflects a statistical range calibrated to the state's dominant rock types and typical source water characteristics.
pH
Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.
TDS — Total Dissolved Solids
Estimated using a derived ratio from water hardness and regional conductance profiles. TDS in natural water correlates strongly with total mineral content including hardness ions.
PFAS — Perfluoroalkyl and Polyfluoroalkyl Substances
EPA UCMR5 (5th Unregulated Contaminant Monitoring Rule, 2023–2025) — sum of PFAS compounds detected at the public water system serving this city. A value of 0 indicates the system was sampled with no detection above reporting limits.
Lead
Modelled estimate based on the EPA Lead and Copper Rule 90th-percentile tap-sample methodology. No publicly available per-city lead dataset with sufficient national coverage exists. Values are a conservative baseline derived from city population tier and infrastructure age — all estimates are maintained below the EPA action level of 0.015 mg/L.
Appliance Lifespan
Calculated from water hardness using a linear degradation model. Baseline lifespans represent soft-water performance (kettle: 8.5 yrs, washing machine: 12.0 yrs, water heater: 15.0 yrs). Hard water mineral scale progressively reduces operational life in direct proportion to hardness concentration.