Plainville Water Hardness & Quality Report (2026)
Water Hardness
~120–179 mg/L
Hardestimated · not lab-verified
Source
groundwater
pH Level
7.3
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
75.7 mg/L
Est. Daily Cost
$0.40
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 Plainville, your appliances are currently losing 20% efficiency due to mineral buildup.
| Appliance | In Plainville | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.8 yrs | 8.5 yrs | -20% |
| Washing Machine | 9.6 yrs | 12 yrs | -20% |
| Water Heater | 12 yrs | 15 yrs | -20% |
Regional Water Comparison
How Plainville compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Plainville, Connecticut | ≈ 120–179 mg/L | 6.8 ppt | 🟠 Hard | groundwater |
| Farmington, Connecticut | 84.5 mg/L | 10.6 ppt | 🟡 Moderately Hard | groundwater |
| New Britain, Connecticut | ≈ 120–179 mg/L | 0 ppt | 🟠 Hard | reservoir |
| Southington, Connecticut | ≈ 120–179 mg/L | 111 ppt | 🟠 Hard | reservoir |
| Bristol, Connecticut | ≈ 120–179 mg/L | 11.3 ppt | 🟠 Hard | reservoir |
National Benchmark
How Plainville compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Plainville | ≈ 120–179 mg/L | 🟠 Moderate |
| USA National Avg | 151 mg/L | 🟠 Moderate |
| Scarsdale Top Rated | 0.02 mg/L | 🟢 None |
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What Makes Plainville's Water Unique?
Local geology and source profile
Aquarion Water Company operates the Plainville Regional System, serving approximately 13,300 people across Plainville, Southington, and Farmington in Hartford County, Connecticut. The supply is 100% groundwater drawn from four wells tapping the Woodford and Johnson Avenue aquifers. No surface water reservoirs or rivers are involved; treatment at local facilities includes filtration, disinfection with chloramines, and corrosion control, with no specific treatment plant names listed in the Consumer Confidence Report beyond the well sources.
The aquifer recharge area overlies the Woodford and Johnson Avenue groundwater zones, part of the broader Farmington River basin. Geology features glacial outwash sands and gravels of the Central Lowland physiographic province overlying fractured Hartland Formation gneiss and schist (Cambrian-Ordovician), with Bristol Gneiss in the underlying bedrock. Limestone and dolomite lenses in the glacial sediments dissolve calcium and magnesium during infiltration, yielding a hard supply without surface runoff dilution.
Hard water in this supply causes moderate scale buildup on fixtures, reducing efficiency in dishwashers, washing machines, and water heaters over time. Periodic vinegar flushes for taps and installing drain screens are recommended maintenance steps; a whole-house water softener extends appliance life and improves soap efficiency, though it adds sodium and requires regular salt refills. The 2024 CCR reports hardness at 10–11 gpg; pH is stable at 7.5–8.5, with no lead action exceedances, no PFAS detections above limits, and low levels of naturally occurring iron and manganese from aquifer sediments.
Geology & Source: Central Lowland glacial drift aquifers — Woodford and Johnson Avenue wells; stratified sands/gravels overlying Hartland Formation Cambrian-Ordovician gneiss and schist; limestone and dolomite lenses dissolve calcium and magnesium producing hard water
Other Connecticut Water Reports
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Frequently Asked Questions
Is Plainville's water safe to drink?
Do I need a water softener in Plainville?
How does Plainville compare to the USA average?
Data Sources & Methodology
Water quality data for Plainville 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.