Beloit Water Hardness & Quality Report (2026)
Water Hardness
5.8 grains per gallon
Source
groundwater
pH Level
7.6
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
232 mg/L
Est. Daily Cost
$0.27
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 Beloit, your appliances are currently losing 13% efficiency due to mineral buildup.
| Appliance | In Beloit | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.3 yrs | 8.5 yrs | -26% |
| Washing Machine | 9.9 yrs | 12 yrs | -17% |
| Water Heater | 11.6 yrs | 15 yrs | -23% |
Regional Water Comparison
How Beloit compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Beloit, Wisconsin | 100 mg/L | 3.1 ppt | 🟡 Moderately Hard | groundwater |
| Machesney Park, Illinois | 202.5 mg/L | 7.1 ppt | 🔴 Very Hard | river |
| Janesville, Wisconsin | 258.5 mg/L | 6.7 ppt | 🔴 Very Hard | groundwater |
| Loves Park, Illinois | 186.5 mg/L | 6.6 ppt | 🔴 Very Hard | river |
| Rockford, Illinois | 160.5 mg/L | 5.7 ppt | 🟠 Hard | river |
National Benchmark
How Beloit compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Beloit | 100 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Beloit's Water Unique?
Local geology and source profile
Beloit, Wisconsin, in Rock County — a major south Wisconsin city on the Illinois border (Beloit is the southernmost city of any size in Wisconsin — on the Rock River at the Wisconsin–Illinois state line), home of Beloit College (one of the most selective small liberal arts colleges in the Midwest, founded in 1846 as the second college in Wisconsin), historically a major manufacturing and industrial center (Beloit was known as 'The Industrial City' and was a center of industrial paper machinery, diesel engines, and heavy equipment manufacturing), a diverse Rock County community, and a member of the Rockford, Illinois metropolitan area — draws its municipal water supply from the Rock River via the City of Beloit Water Division. Water hardness in Beloit measures 100 mg/L — classified as moderately hard.
Beloit's moderate hardness reflects the Rock County Rock River watershed's calcareous Paleozoic carbonate geology and lime softening treatment. The Rock River at Beloit–Rock County drains: the Silurian Niagara Dolomite (highly calcareous dolomite bedrock of the Wisconsin–Illinois border zone); the Ordovician Prairie du Chien Group Dolomite (highly calcareous Ordovician dolomite); and the Wisconsin Age calcareous glacial outwash of the Rock River Valley. City of Beloit's lime softening substantially reduces the raw hardness (estimated 200–250 mg/L raw), producing the moderate 100 mg/L.
At 100 mg/L, Beloit residents encounter moderate scale accumulation. Monthly cleaning with citric acid solution is recommended. City of Beloit Water Division consistently delivers water meeting all Wisconsin DNR and EPA Safe Drinking Water Act requirements.
Geology & Source: River supply from the Rock River and groundwater from the Silurian Dolomite Aquifer via the City of Beloit Water Division — the Rock County south Wisconsin Rock River Valley (Silurian Niagara Dolomite and Ordovician Prairie du Chien Dolomite — the calcareous south Wisconsin Paleozoic carbonate; Rock River supply with lime softening); moderately hard supply at 100 mg/L in Rock County.