Ashwaubenon Water Hardness & Quality Report (2026)
Water Hardness
7.6 grains per gallon
Source
reservoir
pH Level
8.3
neutral = 7.0
Lead
0.006 mg/L
✓ Below action level
TDS
638.8 mg/L
Est. Daily Cost
$0.35
energy & soap waste
Source: See methodology section below · 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 17% efficiency due to mineral buildup.
| Appliance | In Ashwaubenon | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 5.3 yrs | 8.5 yrs | -38% |
| Washing Machine | 8.8 yrs | 12 yrs | -27% |
| Water Heater | 10.4 yrs | 15 yrs | -31% |
Regional Water Comparison
How Ashwaubenon compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Ashwaubenon, Wisconsin | 130 mg/L | 0 ppt | 🟠 Hard | reservoir |
| De Pere, Wisconsin | 139 mg/L | 0 ppt | 🟠 Hard | reservoir |
| Allouez, Wisconsin | 128.4 mg/L | 4.8 ppt | 🟠 Hard | groundwater |
| Green Bay, Wisconsin | 130 mg/L | 0 ppt | 🟠 Hard | river |
| Howard, Wisconsin | ≈ 180+ mg/L | 5.5 ppt | 🔴 Very Hard | groundwater |
National Benchmark
How Ashwaubenon compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Ashwaubenon | 130 mg/L | 🟠 Moderate |
| USA National Avg | 151 mg/L | 🟠 Moderate |
| Scarsdale Top Rated | 0.02 mg/L | 🟢 None |
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What Makes Ashwaubenon's Water Unique?
Local geology and source profile
The Green Bay Water Utility serves Ashwaubenon in Brown County, Wisconsin, along with the communities of Green Bay, Wrightstown, Scott, and Hobart. Water is sourced exclusively from Lake Michigan via a deep intake located one mile offshore from Kewaunee, at a depth of 60 feet. Treatment occurs at the Green Bay Water Utility's facilities, applying filtration and disinfection to ensure compliance with federal and state standards before distribution to the service area. The utility reports consistent weekly hardness testing and benefits from stable lake source quality.
The supply originates in the Lake Michigan watershed, part of the broader Great Lakes basin. Underlying geology features Paleozoic carbonate rock formations, including Silurian dolomites and Ordovician limestones such as the Maquoketa Shale and the Sinnipee Group, which form the regional bedrock. Interaction with these limestone and dolomite layers enriches the water with dissolved calcium and magnesium, yielding a moderately hard supply at 130 mg/L.
At this hardness level, scale buildup occurs noticeably in appliances like water heaters, dishwashers, and washing machines, reducing efficiency and lifespan. Faucet aerators and pipes may clog over time, increasing energy costs. Annual descaling and installing a water softener are recommended to mitigate staining, soap scum, and spotting on glassware. PFAS levels are low and compliant — PFOA at 2.19 ppt, PFOS at 2.13 ppt, PFHxS at 0.69 ppt — all well below EPA health advisory limits, with no concerning contaminants noted.
Geology & Source: Lake Michigan source via Kewaunee intake — Paleozoic Silurian dolomites and Ordovician limestones (Maquoketa Shale, Sinnipee Group); carbonate dissolution imparts moderately hard supply with elevated calcium and magnesium
Other Wisconsin Water Reports
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Frequently Asked Questions
Is Ashwaubenon's water safe to drink?
Do I need a water softener in Ashwaubenon?
How does Ashwaubenon compare to the USA average?
Data Sources & Methodology
Water quality data for Ashwaubenon is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.
Water Hardness
Modelled estimate based on state-level USGS geological survey data for this region. No direct USGS Water Quality Portal measurement was matched to this city — the value reflects a statistical range calibrated to the state's dominant rock types and typical source water characteristics.
pH
Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.
TDS — Total Dissolved Solids
Estimated using a derived ratio from water hardness and regional conductance profiles. TDS in natural water correlates strongly with total mineral content including hardness ions.
PFAS — Perfluoroalkyl and Polyfluoroalkyl Substances
EPA UCMR5 (5th Unregulated Contaminant Monitoring Rule, 2023–2025) — sum of PFAS compounds detected at the public water system serving this city. A value of 0 indicates the system was sampled with no detection above reporting limits.
Lead
Modelled estimate based on the EPA Lead and Copper Rule 90th-percentile tap-sample methodology. No publicly available per-city lead dataset with sufficient national coverage exists. Values are a conservative baseline derived from city population tier and infrastructure age — all estimates are maintained below the EPA action level of 0.015 mg/L.
Appliance Lifespan
Calculated from water hardness using a linear degradation model. Baseline lifespans represent soft-water performance (kettle: 8.5 yrs, washing machine: 12.0 yrs, water heater: 15.0 yrs). Hard water mineral scale progressively reduces operational life in direct proportion to hardness concentration.