Brookfield Water Hardness & Quality Report (2026)
Water Hardness
13.4 grains per gallon
Source
river
pH Level
8.4
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
535.4 mg/L
Est. Daily Cost
$0.61
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 Brookfield, your appliances are currently losing 31% efficiency due to mineral buildup.
| Appliance | In Brookfield | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 2 yrs | 8.5 yrs | -76% |
| Washing Machine | 5.1 yrs | 12 yrs | -58% |
| Water Heater | 6.4 yrs | 15 yrs | -57% |
Regional Water Comparison
How Brookfield compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Brookfield, Illinois | 229 mg/L | 8 ppt | 🔴 Very Hard | river |
| La Grange Park, Illinois | 247.5 mg/L | 8.6 ppt | 🔴 Very Hard | river |
| La Grange, Illinois | 247.5 mg/L | 8.6 ppt | 🔴 Very Hard | river |
| Westchester, Illinois | 192 mg/L | 6.8 ppt | 🔴 Very Hard | river |
| Western Springs, Illinois | 193.5 mg/L | 6.8 ppt | 🔴 Very Hard | river |
National Benchmark
How Brookfield compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Brookfield | 229 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Brookfield's Water Unique?
Local geology and source profile
Brookfield, Illinois, in Cook County — a Cook County village adjacent to Riverside and La Grange, home of the Brookfield Zoo, in the western Chicago suburbs along the Des Plaines River corridor — receives its municipal water from Illinois American Water or the Brookfield Water Division, drawing from Lake Michigan through the Chicago metropolitan water system.
The hard 229 mg/L hardness and high TDS of 535.4 mg/L are consistent with the west Cook County Lake Michigan supply zone — between the north and south suburban readings (Deerfield 144 mg/L; Matteson 248.5 mg/L). All Chicago-area communities receive the same Lake Michigan source water, with hardness variation reflecting water treatment plant output differences and distribution zone blending. The Silurian Niagara Dolomite carbonate platform produces the hard water characteristic of the Chicago Lake Michigan supply.
At 229 mg/L, Brookfield's water is hard — scale builds rapidly in appliances and plumbing. A water softener is recommended. Dishes spot heavily, and bathroom fixtures develop calcium deposits quickly. The PFAS level of 8.0 ppt warrants a certified reverse osmosis drinking water filter — the Brookfield Zoo (legacy cleaning and maintenance chemicals), the Calumet Region industrial corridor, and the west Cook County Lake Michigan PFAS background contribute to Brookfield's readings.
Geology & Source: Brookfield in Cook County draws from the Illinois American Water or Brookfield Water on Lake Michigan (Chicago Metropolitan system) — Lake Michigan receives drainage from the Great Lakes basin (Silurian Niagara Dolomite, calcareous Pleistocene till) — Lake Michigan Silurian dolomite carbonate drainage produces hard water at 229 mg/L with high TDS 535 mg/L in this Cook County Illinois village.