Vincennes Water Hardness & Quality Report (2026)
Water Hardness
13.1 grains per gallon
Source
river
pH Level
8.4
neutral = 7.0
Lead
0.006 mg/L
✓ Below action level
TDS
513.3 mg/L
Est. Daily Cost
$0.60
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 Vincennes, your appliances are currently losing 30% efficiency due to mineral buildup.
| Appliance | In Vincennes | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 2.2 yrs | 8.5 yrs | -74% |
| Washing Machine | 5.3 yrs | 12 yrs | -56% |
| Water Heater | 6.6 yrs | 15 yrs | -56% |
Regional Water Comparison
How Vincennes compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Vincennes, Indiana | 224.5 mg/L | 7.1 ppt | 🔴 Very Hard | river |
| Jasper, Indiana | 131 mg/L | 3.8 ppt | 🟠 Hard | river |
| Evansville, Indiana | 141.5 mg/L | 4.1 ppt | 🟠 Hard | river |
| Terre Haute, Indiana | 189.5 mg/L | 5.9 ppt | 🔴 Very Hard | river |
| Henderson, Kentucky | 173.5 mg/L | 5.6 ppt | 🟠 Hard | river |
National Benchmark
How Vincennes compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Vincennes | 224.5 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Vincennes's Water Unique?
Local geology and source profile
Vincennes, Indiana, in Knox County — the Knox County seat adjacent to Lawrenceville, IL on the Wabash River, Indiana's oldest city (founded 1732) and the original capital of the Indiana Territory — receives its municipal water from the Vincennes Water Division, drawing from the Wabash River at the Vincennes Knox County intake.
The very hard 224.5 mg/L hardness and TDS of 513.3 mg/L reflect the lower Wabash River's Illinois-Indiana Till Plains drainage character. The Wabash River at Vincennes receives drainage from the Indiana Uplands (Silurian Niagara Dolomite — primary aquifer, calcareous — western Indiana), calcareous Pleistocene Illinoian and Woodfordian till (derived from Great Lakes dolomite), and the Pennsylvanian Raccoon Creek Group (calcareous shale). The cumulative Silurian dolomite-Pleistocene till carbonate loading produces the very hard water at Vincennes.
At 224.5 mg/L with TDS 513, Vincennes' water is very hard. A water softener is strongly recommended. Scale builds rapidly in all appliances and plumbing systems. The PFAS level of 7.1 ppt warrants a certified drinking water filter — the Crane Army Ammunition Activity (Martin County, Indiana — one of the largest Naval Surface Warfare Centers in the US, AFFF in the Wabash watershed), the Knox County industrial corridor, and the lower Wabash River PFAS background contribute to Vincennes' elevated readings.
Geology & Source: Vincennes in Knox County draws from the Vincennes Water Division on the Wabash River (Knox County, southwest Indiana) — the Wabash drains the Illinois Till Plains (Silurian Niagara Dolomite, calcareous Pleistocene Illinoian till) and Indiana Uplands (Pennsylvanian calcareous shale) — Indiana Wabash River Silurian dolomite and Pleistocene till carbonate drainage produces very hard water at 224.5 mg/L with TDS 513.3 mg/L in this Knox County Indiana city.