Montville Center Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

reservoir

pH Level

6.6

neutral = 7.0

Lead

0.005 mg/L

✓ Below action level

TDS

142.3 mg/L

Est. Daily Cost

$0.40

energy & soap waste

Source: See methodology section below · Updated 2026

hard~120–179 mg/LHard · est.

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 20% efficiency due to mineral buildup.

Appliance	In Montville Center	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 Montville Center compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Montville Center, Connecticut	≈ 120–179 mg/L	8.9 ppt	🟠 Hard	reservoir
Norwich, Connecticut	≈ 120–179 mg/L	96.6 ppt	🟠 Hard	reservoir
New London, Connecticut	≈ 0–60 mg/L	10.5 ppt	🟢 Soft	reservoir
Waterford, Connecticut	≈ 120–179 mg/L	0 ppt	🟠 Hard	reservoir
Ledyard, Connecticut	≈ 120–179 mg/L	5.2 ppt	🟠 Hard	reservoir

National Benchmark

How Montville Center compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Montville Center	≈ 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 Montville Center's Water Unique?

Local geology and source profile

Source: ReservoirTDS: 142.3 mg/LpH: 6.6

Montville Water Pollution Control Authority (WPCA) serves Montville Center and surrounding areas in New London County, Connecticut. The utility sources drinking water from local groundwater wells, with water quality testing covering parameters including calcium and hardness. No specific treatment plant names are detailed in available reports, but standard wellhead treatment addresses bacteria, iron, and manganese per state guidelines for new wells. The system complies with Connecticut Department of Public Health source water assessments, and annual drinking water quality reports are published — the 2021 report confirming compliance with all state and federal standards.

Local groundwater recharge areas around Montville are protected under state source assessments. The geology features the Connecticut River Valley Lowland with glacial aquifers overlying Paleozoic bedrock, including gneiss and schist formations of the Avalonian terrane. Limestone and dolomite lenses in the valley lowlands contribute dissolved calcium and magnesium to percolating groundwater, resulting in a hard water character. Glacial till and outwash sands filter the water but do not remove these minerals, maintaining elevated hardness levels typical of limestone-influenced New England aquifers.

Hard water leads to moderate scale buildup in appliances like water heaters, dishwashers, and coffee makers, reducing efficiency over time. Laundry may feel stiffer, and soap lathering is less effective. Regular maintenance — including annual deliming of fixtures and flushing water heaters — is advised. A water softener is recommended for households to extend appliance life and improve cleaning performance. Water testing covers coliform, E.coli, iron, manganese, sodium, calcium, chloride, and hardness; no specific pH, lead, or copper data are highlighted, but CT DPH source assessments are available. PFAS testing is not detailed locally, though nearby MDC reports no detections; treatment involves disinfection and basic filtration for well water.

Geology & Source: Connecticut River Valley aquifer, New London County; Paleozoic schists and gneisses of the Avalonian terrane with limestone and dolomite lenses — dissolved calcium and magnesium from glacial aquifers produce hard water

Other Connecticut Water Reports

Norwich

≈ 120–179 mg/L

🟠 Hard

New London

≈ 0–60 mg/L

🟢 Soft

Waterford

≈ 120–179 mg/L

🟠 Hard

Ledyard

≈ 120–179 mg/L

🟠 Hard

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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 Montville Center's water safe to drink?

Yes. Montville Center's water meets all federal safety standards. The hardness is ≈ 120–179 mg/L (Hard), which is safe to drink. High hardness affects appliances and taste, but poses no health risk.

Do I need a water softener in Montville Center?

At ≈ 120–179 mg/L (Hard), Montville Center's water will cause significant limescale on kettles, washing machines, and water heaters. A water softener or descaler is strongly recommended to extend appliance lifespan and reduce energy bills by up to 20%.

How does Montville Center compare to the USA average?

The USA national average is 151 mg/L. Montville Center (≈ 120–179 mg/L) is 1 mg/L below the national average. The softest major city is Scarsdale at just 0.02 mg/L.

Data Sources & Methodology

Water quality data for Montville Center is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.

Estimated

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.

Estimated

Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.

Estimated

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.

Measured

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.

Modelled

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.

Calculated

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.