Beloit Water Hardness & Quality Report (2026)
Water Hardness
20.2 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
$0.92
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 Beloit, your appliances are currently losing 45% efficiency due to mineral buildup.
| Appliance | In Beloit | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 3 yrs | 12 yrs | -75% |
| Water Heater | 5 yrs | 15 yrs | -67% |
Regional Water Comparison
How Beloit compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Beloit, Wisconsin | 346 mg/L | 3 ppt | 🔴 Very Hard | groundwater |
| Roscoe, Illinois | ≈ 120–179 mg/L | 6.1 ppt | 🟠 Hard | groundwater |
| Machesney Park, Illinois | ≈ 180+ mg/L | 129.5 ppt | 🔴 Very Hard | groundwater |
| Janesville, Wisconsin | 350 mg/L | 0 ppt | 🔴 Very Hard | groundwater |
| Loves Park, Illinois | ≈ 180+ mg/L | 0 ppt | 🔴 Very Hard | groundwater |
National Benchmark
How Beloit compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Beloit | 346 mg/L | 🔴 High |
| USA National Avg | 151 mg/L | 🟠 Moderate |
| Scarsdale Top Rated | 0.02 mg/L | 🟢 None |
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What Makes Beloit's Water Unique?
Local geology and source profile
Beloit Water Utility serves the City of Beloit in Rock County, Wisconsin, providing drinking water to approximately 36,000 residents. The utility operates wells drawing from local groundwater aquifers, with treatment at the Beloit Water Treatment Plant. Water is also purchased in part by neighboring systems such as South Beloit, IL. The service area covers the urban core and surrounding townships along the Wisconsin-Illinois border near the Rock River, with the utility earning an A grade (98.8/100) in the 2024 Wisconsin Waterworks Excellence Project for health-based compliance.
The supply originates in the Turtle Creek watershed, part of the larger Rock River basin draining southern Wisconsin. Underlying geology features Paleozoic sandstones and dolomites — including the Mount Simon and Eau Claire formations — which form productive aquifers. These carbonate-bearing rocks dissolve over time, yielding a mineral-rich supply. Glacial deposits overlay the bedrock, facilitating recharge while contributing to the mineralised profile; prolonged contact with carbonate-rich strata drives the very hard water character at 346 mg/L.
Very hard water promotes significant scale buildup in pipes, water heaters, dishwashers, washing machines, and coffee makers, where mineral deposits can increase energy use by up to 20–30%. Regular flushing of systems, vinegar descaling of appliances, and installing scale-inhibiting filters are recommended. A water softener is strongly recommended to improve soap efficiency and prevent dry skin and spotting. Two contaminants exceed EPA health guidelines (MCLGs) within legal limits; certified filters are advised for PFAS and other contaminants.
Geology & Source: Cambrian-Ordovician Mount Simon Sandstone and Eau Claire Formation aquifers, southern Wisconsin; Paleozoic dolomites and karst limestone — prolonged carbonate contact produces very hard supply at 346 mg/L; glacial drift overlies bedrock
Other Wisconsin Water Reports
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Frequently Asked Questions
Is Beloit's water safe to drink?
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How does Beloit compare to the USA average?
Data Sources & Methodology
Water quality data for Beloit 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.