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Troy Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

groundwater

pH Level

7.6

neutral = 7.0

Lead

0.002 mg/L

✓ Below action level

TDS

203 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 Troy, your appliances are currently losing 20% efficiency due to mineral buildup.

ApplianceIn TroySoft Water CityEfficiency 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 Troy compares to its nearest neighbours

CityHardnessPFAS (ppt)RiskSource
Troy, Missouri≈ 120–179 mg/L0 ppt🟠 Hardgroundwater
Wentzville, Missouri≈ 180+ mg/L0 ppt🔴 Very Hardgroundwater
Lake Saint Louis, Missouri≈ 120–179 mg/L4.6 ppt🟠 Hardriver
O'Fallon, Missouri≈ 180+ mg/L11.7 ppt🔴 Very Hardriver
Dardenne Prairie, Missouri≈ 180+ mg/L8.5 ppt🔴 Very Hardriver

National Benchmark

How Troy compares to the USA average

BenchmarkHardnessAppliance Risk
Troy≈ 120–179 mg/L🟠 Moderate
USA National Avg151 mg/L🟠 Moderate
Scarsdale Top Rated0.02 mg/L🟢 None

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What Makes Troy's Water Unique?

Local geology and source profile

Source: GroundwaterTDS: 203 mg/LpH: 7.6

LINCOLN COUNTY PWSD 2 provides drinking water for about 875 residents in Troy, Missouri. The utility draws its supply from groundwater wells that tap into local aquifers within Lincoln County. While specific treatment plant names aren't provided, the water is processed at facilities managed by the public water supply district. Lincoln County PWSD 1 also serves the area, utilizing similar groundwater sources. The watershed for Troy's supply consists of the local groundwater recharge areas in the upland regions of Lincoln County, which feed into the Ozark Plateaus aquifer system.

The region's geology features Paleozoic limestones and dolomites from the Mississippian age, like the Burlington and Keokuk limestones. Overlying these are the karstic Springfield Plateau layers from the Pennsylvanian age. These carbonate-rich rocks naturally transfer minerals to rainwater as it infiltrates through the fractured and cavernous formations. This geological dissolution process, characteristic of Missouri's northern karst areas, is responsible for the mineralization and hardness of the groundwater.

Homeowners in Troy may notice scale buildup in appliances like water heaters, dishwashers, and washing machines, which can reduce their efficiency and lifespan. Visible deposits might appear on faucets and kettles, and laundry may feel stiff unless a softener is used. Regular descaling with vinegar can help maintain appliances. Considering a water softener is often recommended for households experiencing issues like spotted dishes or dry skin, as these systems protect plumbing and improve the lathering of soaps and detergents. Public supplies here generally meet EPA standards, with recent assessments indicating good quality.

Geology & Source: Ozark Plateaus aquifer system; Mississippian limestones and Pennsylvanian dolomites; soluble carbonate rocks dissolve calcium and magnesium, leading to hard water

Other Missouri Water Reports

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Frequently Asked Questions

Is Troy's water safe to drink?
Yes. Troy'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 Troy?
At ≈ 120–179 mg/L (Hard), Troy'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 Troy compare to the USA average?
The USA national average is 151 mg/L. Troy (≈ 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 Troy 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

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.

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.