Brookfield Water Hardness & Quality Report (2026)
Water Hardness
180+ mg/L
Very Hardestimated · not lab-verified
Source
groundwater
pH Level
7.9
neutral = 7.0
Lead
0.006 mg/L
✓ Below action level
TDS
634.6 mg/L
Est. Daily Cost
$0.91
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 Brookfield, your appliances are currently losing 45% efficiency due to mineral buildup.
| Appliance | In Brookfield | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.7 yrs | 8.5 yrs | -45% |
| Washing Machine | 6.6 yrs | 12 yrs | -45% |
| Water Heater | 8.3 yrs | 15 yrs | -45% |
Regional Water Comparison
How Brookfield compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Brookfield, Wisconsin | ≈ 180+ mg/L | 47.4 ppt | 🔴 Very Hard | groundwater |
| New Berlin, Wisconsin | 136.96 mg/L | 0 ppt | 🟠 Hard | reservoir |
| Wauwatosa, Wisconsin | ≈ 180+ mg/L | 0 ppt | 🔴 Very Hard | reservoir |
| West Allis, Wisconsin | ≈ 120–179 mg/L | 0 ppt | 🟠 Hard | reservoir |
| Menomonee Falls, Wisconsin | ≈ 120–179 mg/L | 0 ppt | 🟠 Hard | reservoir |
National Benchmark
How Brookfield compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Brookfield | ≈ 180+ mg/L | 🔴 High |
| USA National Avg | 151 mg/L | 🟠 Moderate |
| Scarsdale Top Rated | 0.02 mg/L | 🟢 None |
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What Makes Brookfield's Water Unique?
Local geology and source profile
City of Brookfield Utilities provides water sourced from multiple wells in Waukesha County, Wisconsin, serving approximately 40,000 residents across 28 square miles. The adjacent Town of Brookfield Sanitary District 4 operates six wells for its 6,419 customers. No surface water is used; all supply is groundwater with treatment including chlorination, polyphosphate corrosion inhibition, and iron filtration at select wells. The annual Water Quality Report is published per Wisconsin DNR requirements and is accessible via the city's website.
Brookfield's groundwater originates in the Fox River drainage basin, where precipitation infiltrates glacial deposits and bedrock aquifers. The geology features Pleistocene glacial till over Ordovician-Silurian dolomites and Cambrian sandstones of the Mount Simon and Eau Claire Formations, which contribute to a very hard supply through natural dissolution of calcium and magnesium. This mineralised character reflects the limestone-dolomite dominated subsurface common in southeast Wisconsin.
Very hard water promotes scale buildup in pipes, water heaters, dishwashers, and washing machines, reducing efficiency and lifespan. Fixtures accumulate chalky deposits and more detergent is needed for cleaning. Regular deliming of appliances and annual heater flushing are advised; a home water softener is strongly recommended. The utility uses polyphosphates for corrosion control and chlorine for disinfection; fluoride occurs naturally at about 0.4 mg/L without addition, and iron filtration addresses well-specific issues. The Town of Brookfield San Dist 4 reports 5 contaminants above EPA health guidelines; full compliance details are available in the annual Consumer Confidence Report.
Geology & Source: Southeast Wisconsin glacial till plains; six wells in Pleistocene glacial drift over Ordovician-Silurian dolomites and Cambrian Mount Simon/Eau Claire sandstones — carbonate and dolomite dissolution yields very hard groundwater
Other Wisconsin Water Reports
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Frequently Asked Questions
Is Brookfield's water safe to drink?
Do I need a water softener in Brookfield?
How does Brookfield compare to the USA average?
Data Sources & Methodology
Water quality data for Brookfield 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.