Ashwaubenon Water Hardness & Quality Report (2026)
Water Hardness
12.4 grains per gallon
Source
groundwater
pH Level
8.3
neutral = 7.0
Lead
0.006 mg/L
✓ Below action level
TDS
638.8 mg/L
Est. Daily Cost
$0.57
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 Ashwaubenon, your appliances are currently losing 28% efficiency due to mineral buildup.
| Appliance | In Ashwaubenon | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 2.6 yrs | 8.5 yrs | -69% |
| Washing Machine | 5.7 yrs | 12 yrs | -53% |
| Water Heater | 7.1 yrs | 15 yrs | -53% |
Regional Water Comparison
How Ashwaubenon compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Ashwaubenon, Wisconsin | 213 mg/L | 5.7 ppt | 🔴 Very Hard | groundwater |
| De Pere, Wisconsin | 273 mg/L | 7.1 ppt | 🔴 Very Hard | groundwater |
| Allouez, Wisconsin | 174.5 mg/L | 4.8 ppt | 🟠 Hard | groundwater |
| Green Bay, Wisconsin | 242 mg/L | 6.4 ppt | 🔴 Very Hard | groundwater |
| Howard, Wisconsin | 202 mg/L | 5.5 ppt | 🔴 Very Hard | groundwater |
National Benchmark
How Ashwaubenon compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Ashwaubenon | 213 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Ashwaubenon's Water Unique?
Local geology and source profile
Ashwaubenon, Wisconsin, in Brown County — a Brown County village adjacent to Green Bay and De Pere in the Green Bay metro area — receives its municipal water from the Ashwaubenon Water and Light Division, drawing from deep wells accessing the Silurian Niagara Dolomite and Ordovician Prairie du Chien dolomite aquifer beneath Brown County.
The very hard 213 mg/L hardness and high TDS of 638.8 mg/L reflect the east Wisconsin Green Bay area's intense Silurian-Ordovician dolomite aquifer character — similar to the Menasha Winnebago County supply (233.5 mg/L) and consistent across the eastern Wisconsin Niagara Dolomite belt. The Silurian Niagara Dolomite (the dominant east Wisconsin carbonate platform — the same formation exposed at Niagara Falls) and Ordovician Prairie du Chien Group dolomite produce the characteristically very hard water of all Green Bay metro communities.
At 213 mg/L, Ashwaubenon's water is very hard. A water softener is strongly recommended. Scale builds rapidly on all heating surfaces, appliance lifespans are significantly shortened, and water heaters require annual descaling without softening. The PFAS level of 5.7 ppt warrants a certified drinking water filter — the Brown County Green Bay industrial and paper mill complex (Fox River corridor), Austin Straubel International Airport (AFFF), and the east Wisconsin PFAS background contribute to Ashwaubenon's readings.
Geology & Source: Ashwaubenon in Brown County draws from the Ashwaubenon Water Division on the Fox River basin wells (Brown County, east Wisconsin) — the Brown County aquifer is developed in Silurian Niagara Dolomite and Ordovician Prairie du Chien dolomite — Wisconsin Brown County Silurian-Ordovician dolomite aquifer produces very hard water at 213 mg/L with TDS 638.8 mg/L in this Brown County Wisconsin village.