Platteville Water Hardness & Quality Report (2026)
Water Hardness
11.7 grains per gallon
Source
groundwater
pH Level
8.3
neutral = 7.0
Lead
0.006 mg/L
✓ Below action level
TDS
588.1 mg/L
Est. Daily Cost
$0.54
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 Platteville, your appliances are currently losing 27% efficiency due to mineral buildup.
| Appliance | In Platteville | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 3 yrs | 8.5 yrs | -65% |
| Washing Machine | 6.2 yrs | 12 yrs | -48% |
| Water Heater | 7.6 yrs | 15 yrs | -49% |
Regional Water Comparison
How Platteville compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Platteville, Wisconsin | 201 mg/L | 5.4 ppt | 🔴 Very Hard | groundwater |
| Dubuque, Iowa | 279 mg/L | 5.8 ppt | 🔴 Very Hard | river |
| Clinton, Iowa | 286 mg/L | 5.9 ppt | 🔴 Very Hard | river |
| Freeport, Illinois | 210.5 mg/L | 7.4 ppt | 🔴 Very Hard | river |
| Verona, Wisconsin | 161 mg/L | 4.5 ppt | 🟠 Hard | groundwater |
National Benchmark
How Platteville compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Platteville | 201 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Platteville's Water Unique?
Local geology and source profile
Platteville, Wisconsin, in Grant County — the Grant County seat adjacent to Cuba City and Boscobel on the Galena dolomite aquifer in southwest Wisconsin — receives its water from the City of Platteville Water, drawing from the Galena dolomite aquifer (Grant County) through the southwest Wisconsin distribution.
The hard 201 mg/L hardness and TDS of 588.1 mg/L reflect the southwest Wisconsin Grant County Galena-Platteville dolomite aquifer supply's hard dolomitic character — the Ordovician Galena Dolomite and Platteville Formation produce hard dolomitic water typical of the southwest Wisconsin communities on the Driftless Area dolomite aquifer (compare Glendale WI: 198.5/578 on the Milwaukee County Silurian Niagaran Dolomite comparable; Stoughton WI: 178.5/499 in Dane County). The Galena-Platteville aquifer at Grant County — Ordovician Galena Dolomite (dolomitic — primary hardness contributor), Ordovician Platteville Formation (calcareous — secondary contributor), and Cambrian Jordan Sandstone (insoluble — dilutant at base).
At 201 mg/L with TDS 588, Platteville's water is hard. A water softener is recommended to prevent scale buildup. A reverse osmosis system is advisable for drinking water. The PFAS level of 5.4 ppt warrants a certified drinking water filter — the Grant County southwest Wisconsin industrial corridor contribute to Platteville's elevated readings.
Geology & Source: Platteville in Grant County draws from the City of Platteville Water on the Galena dolomite aquifer (Grant County, southwest Wisconsin) — the Galena-Platteville dolomite at Grant County is developed in Ordovician Galena Dolomite (dolomitic) and Ordovician Platteville Formation (calcareous) — Wisconsin Grant County Galena Dolomite Ordovician dolomitic aquifer produces hard water at 201 mg/L with TDS 588.1 mg/L.