Monroe Water Hardness & Quality Report (2026)
Water Hardness
5.3 grains per gallon
Source
groundwater
pH Level
7.5
neutral = 7.0
Lead
0.001 mg/L
✓ Below action level
TDS
205 mg/L
Est. Daily Cost
$0.24
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 Monroe, your appliances are currently losing 12% efficiency due to mineral buildup.
| Appliance | In Monroe | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.6 yrs | 8.5 yrs | -22% |
| Washing Machine | 10.3 yrs | 12 yrs | -14% |
| Water Heater | 12 yrs | 15 yrs | -20% |
Regional Water Comparison
How Monroe compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Monroe, Wisconsin | 90.5 mg/L | 2.9 ppt | 🟡 Moderately Hard | groundwater |
| Freeport, Illinois | 210.5 mg/L | 7.4 ppt | 🔴 Very Hard | river |
| Fitchburg, Wisconsin | 107 mg/L | 3.3 ppt | 🟡 Moderately Hard | groundwater |
| Verona, Wisconsin | 161 mg/L | 4.5 ppt | 🟠 Hard | groundwater |
| Oregon, Wisconsin | 81 mg/L | 2.7 ppt | 🟡 Moderately Hard | groundwater |
National Benchmark
How Monroe compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Monroe | 90.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Monroe's Water Unique?
Local geology and source profile
Monroe, Wisconsin, in Green County — the Green County seat adjacent to New Glarus and Argyle in the Swiss cheese country of south-central Wisconsin — receives its water from the City of Monroe Water Department, drawing from local well fields on the Sugar River aquifer through the south-central Wisconsin distribution.
The moderately hard 90.5 mg/L hardness and TDS of 205 mg/L reflect the Green County supply's moderate dolomitic character — the Ordovician Galena Dolomite and Platteville Formation are slightly calcareous formations in the south Wisconsin Dolomite Plateau, contributing moderate dissolved mineral content; Monroe's water is significantly softer than other Wisconsin Fox Valley cities due to the shallower well field penetration (compare New Glarus WI: 88/199 in Green County comparable; Argyle WI: 92/211 in Green County comparable; Monroe consistent moderate from the same Green County Sugar River Ordovician supply). The Sugar River aquifer — Ordovician Galena Dolomite (slightly dolomitic — primary hardness contributor), Ordovician Platteville Formation (slightly calcareous — secondary contributor), and Quaternary Sugar River alluvium (calcareous — minor TDS).
At 90.5 mg/L with TDS 205, Monroe's water is moderately hard — mild scale buildup. Semi-annual descaling is appropriate. The PFAS level of 2.9 ppt is low — a clean result for south-central Wisconsin. Review the City of Monroe's annual water quality report.
Geology & Source: Monroe in Green County draws from the Monroe Water on the Sugar River aquifer (Green County, south-central Wisconsin) — the Green County aquifer draws from Ordovician Galena Dolomite (slightly dolomitic) and Ordovician Platteville Formation (slightly calcareous) — Wisconsin Green County Sugar River Ordovician supply produces moderately hard water at 90.5 mg/L with TDS 205 mg/L.