Waupun Water Hardness & Quality Report (2026)
Water Hardness
13.8 grains per gallon
Source
groundwater
pH Level
8.5
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
740.2 mg/L
Est. Daily Cost
$0.63
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 Waupun, your appliances are currently losing 31% efficiency due to mineral buildup.
| Appliance | In Waupun | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.8 yrs | 8.5 yrs | -79% |
| Washing Machine | 4.9 yrs | 12 yrs | -59% |
| Water Heater | 6.2 yrs | 15 yrs | -59% |
Regional Water Comparison
How Waupun compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Waupun, Wisconsin | 236 mg/L | 6.2 ppt | 🔴 Very Hard | groundwater |
| Beaver Dam, Wisconsin | 84.5 mg/L | 2.8 ppt | 🟡 Moderately Hard | groundwater |
| Fond du Lac, Wisconsin | 117 mg/L | 3.5 ppt | 🟡 Moderately Hard | groundwater |
| Oshkosh, Wisconsin | 85 mg/L | 2.8 ppt | 🟡 Moderately Hard | groundwater |
| Watertown, Wisconsin | 228 mg/L | 6 ppt | 🔴 Very Hard | groundwater |
National Benchmark
How Waupun compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Waupun | 236 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Waupun's Water Unique?
Local geology and source profile
Waupun, Wisconsin, in Dodge County — a Dodge County city adjacent to Beaver Dam and Fox Lake in the Horicon Marsh region of south-central Wisconsin — receives its water from the City of Waupun Water Department, drawing from deep Silurian dolomite wells through the south-central Wisconsin distribution.
The very hard 236 mg/L hardness and high TDS of 740.2 mg/L reflect the Dodge County Silurian dolomite supply's very hard character — the Silurian Niagaran Dolomite and Ordovician Prairie du Chien Dolomite are among the most calcareous and dolomitic formations in Wisconsin, and deep groundwater wells tapping these formations in Dodge County produce highly mineralized water (compare Beaver Dam WI: 230/722 in Dodge County comparable; Fox Lake WI: 241/757 in Dodge County comparable; Waupun consistent very hard from the same Dodge County Silurian dolomitic groundwater supply). The Dodge County dolomite aquifer — Silurian Niagaran Dolomite (highly dolomitic — primary hardness contributor), Ordovician Prairie du Chien Dolomite (dolomitic — secondary contributor), and Quaternary glacial till (calcareous — TDS contributor).
At 236 mg/L with TDS 740, Waupun's water is very hard — a water softener is strongly recommended to protect plumbing and appliances. The elevated TDS may noticeably affect taste. The PFAS level of 6.2 ppt warrants a certified drinking water filter. Review the City of Waupun's annual water quality report.
Geology & Source: Waupun in Dodge County draws from the City of Waupun Water on the Dodge County dolomite aquifer (Dodge County, south-central Wisconsin) — the Dodge County aquifer is developed in Silurian Niagaran Dolomite (highly dolomitic) and Ordovician Prairie du Chien Dolomite (dolomitic) — Wisconsin Dodge County Silurian dolomitic groundwater produces very hard water at 236 mg/L with TDS 740.2 mg/L.