Marinette Water Hardness & Quality Report (2026)
Water Hardness
10.3 grains per gallon
Source
groundwater
pH Level
8.1
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
488.8 mg/L
Est. Daily Cost
$0.47
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 Marinette, your appliances are currently losing 23% efficiency due to mineral buildup.
| Appliance | In Marinette | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 3.8 yrs | 8.5 yrs | -55% |
| Washing Machine | 7.1 yrs | 12 yrs | -41% |
| Water Heater | 8.6 yrs | 15 yrs | -43% |
Regional Water Comparison
How Marinette compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Marinette, Wisconsin | 176 mg/L | 4.9 ppt | 🟠 Hard | groundwater |
| Suamico, Wisconsin | 186.5 mg/L | 5.1 ppt | 🔴 Very Hard | groundwater |
| Green Bay, Wisconsin | 242 mg/L | 6.4 ppt | 🔴 Very Hard | groundwater |
| Bellevue, Wisconsin | 97.5 mg/L | 3.1 ppt | 🟡 Moderately Hard | groundwater |
| Howard, Wisconsin | 202 mg/L | 5.5 ppt | 🔴 Very Hard | groundwater |
National Benchmark
How Marinette compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Marinette | 176 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Marinette's Water Unique?
Local geology and source profile
Marinette, Wisconsin, in Marinette County — the Marinette County seat adjacent to Menominee and Peshtigo on the Menominee River at the Wisconsin-Michigan border — receives its water from the City of Marinette Water Department, drawing from the Silurian Dolomite Aquifer through the northeast Wisconsin distribution.
The hard 176 mg/L hardness and TDS of 488.8 mg/L reflect the Marinette County dolomite aquifer supply's hard dolomitic character — the Silurian Niagaran Dolomite and Ordovician Prairie du Chien Dolomite are highly dolomitic formations in the Wisconsin Dolomite Plateau, and Marinette city wells penetrate these formations to produce hard, mineralized water (compare Menominee MI: 173/480 in Menominee County comparable; Peshtigo WI: 179/497 in Marinette County comparable; Marinette consistent hard from the same Marinette County Silurian Niagaran aquifer supply). The Northeast Wisconsin dolomite aquifer — Silurian Niagaran Dolomite (highly dolomitic — primary hardness contributor), Ordovician Prairie du Chien Dolomite (highly dolomitic — secondary contributor), and Quaternary Menominee River alluvium (calcareous — TDS contributor).
At 176 mg/L with TDS 489, Marinette's water is hard — scale builds in appliances. Quarterly descaling is appropriate. The PFAS level of 4.9 ppt is moderate — a certified drinking water filter provides added protection. Review the City of Marinette's annual water quality report.
Geology & Source: Marinette in Marinette County draws from the Marinette Water on the Silurian Dolomite Aquifer (Marinette County, northeast Wisconsin) — the northeast Wisconsin aquifer draws from Silurian Niagaran Dolomite (highly dolomitic) and Ordovician Prairie du Chien Dolomite (highly dolomitic) — Wisconsin Marinette County Silurian Niagaran aquifer produces hard water at 176 mg/L with TDS 488.8 mg/L.