Troy Water Hardness & Quality Report (2026)
Water Hardness
15.8 grains per gallon
Source
river
pH Level
8.5
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
705 mg/L
Est. Daily Cost
$0.72
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 Troy, your appliances are currently losing 36% efficiency due to mineral buildup.
| Appliance | In Troy | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 3.6 yrs | 12 yrs | -70% |
| Water Heater | 5 yrs | 15 yrs | -67% |
Regional Water Comparison
How Troy compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Troy, Illinois | 270.5 mg/L | 9.4 ppt | 🔴 Very Hard | river |
| Glen Carbon, Illinois | 146.5 mg/L | 5.2 ppt | 🟠 Hard | river |
| Edwardsville, Illinois | 206 mg/L | 7.2 ppt | 🔴 Very Hard | river |
| Collinsville, Illinois | 282 mg/L | 9.8 ppt | 🔴 Very Hard | river |
| O'Fallon, Illinois | 239.5 mg/L | 8.4 ppt | 🔴 Very Hard | river |
National Benchmark
How Troy compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Troy | 270.5 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Troy's Water Unique?
Local geology and source profile
Troy, Illinois, in Madison County — a Madison County city adjacent to Edwardsville and Collinsville in southwest Illinois — receives its water from the City of Troy Water Department, drawing from Missouri River alluvium wells through the southwest Illinois distribution.
The very hard 270.5 mg/L hardness and TDS of 705 mg/L reflect the Madison County supply's very hard calcareous-evaporitic character — the Mississippian Burlington Limestone and Quaternary Missouri River valley alluvium are calcareous-evaporitic formations in the southwest Illinois bluffs and Missouri River bottomlands; Troy's alluvial wells along the Missouri River corridor concentrate significantly harder and higher-TDS water than surrounding surface-water supplies (compare Edwardsville IL: 266/695 in Madison County comparable; Collinsville IL: 274/715 in Madison County comparable; Troy consistent very hard from the same Madison County Missouri alluvium well Mississippian calcareous supply). The Missouri River alluvium wellfield — Mississippian Burlington Limestone (calcareous — secondary contributor), Quaternary Missouri River valley alluvium (calcareous evaporitic — primary hardness contributor), and Holocene Missouri River bottomland deposit (evaporitic — TDS contributor).
At 270.5 mg/L with TDS 705, Troy's water is very hard — a water softener is strongly recommended to protect plumbing and appliances. The PFAS level of 9.4 ppt warrants a certified drinking water filter. Review the City of Troy's annual water quality report.
Geology & Source: Troy in Madison County draws from the Troy Water on the Missouri River alluvium/Kaskaskia wells (Madison County, southwest Illinois) — the southwest Illinois limestone plain at Madison County draws from Mississippian Burlington Limestone (calcareous) and Quaternary Missouri River valley alluvium (calcareous evaporitic) — Illinois Madison County Missouri alluvium well Mississippian calcareous supply produces very hard water at 270.5 mg/L with TDS 705 mg/L.