La Grange Park Water Hardness & Quality Report (2026)
Water Hardness
14.5 grains per gallon
Source
river
pH Level
8.5
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
608.5 mg/L
Est. Daily Cost
$0.66
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 La Grange Park, your appliances are currently losing 33% efficiency due to mineral buildup.
| Appliance | In La Grange Park | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 4.4 yrs | 12 yrs | -63% |
| Water Heater | 5.7 yrs | 15 yrs | -62% |
Regional Water Comparison
How La Grange Park compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ La Grange Park, Illinois | 247.5 mg/L | 8.6 ppt | 🔴 Very Hard | river |
| Brookfield, Illinois | 229 mg/L | 8 ppt | 🔴 Very Hard | river |
| Westchester, Illinois | 192 mg/L | 6.8 ppt | 🔴 Very Hard | river |
| La Grange, Illinois | 247.5 mg/L | 8.6 ppt | 🔴 Very Hard | river |
| Western Springs, Illinois | 193.5 mg/L | 6.8 ppt | 🔴 Very Hard | river |
National Benchmark
How La Grange Park compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ La Grange Park | 247.5 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes La Grange Park's Water Unique?
Local geology and source profile
La Grange Park, Illinois, in Cook County — a Cook County village adjacent to La Grange and Western Springs in the west Chicago suburb — receives its water from Illinois American Water, drawing from Lake Michigan (Cook County) through the west Chicago metro distribution.
The very hard 247.5 mg/L hardness and TDS of 608.5 mg/L are significantly harder than the raw Lake Michigan supply (129 mg/L at Richton Park) — reflecting La Grange Park's supply blending with the Silurian dolomite deep well supplementing the Lake Michigan feed, a practice in some west Cook County communities where the local dolomite aquifer is hard. The La Grange Park supply — local Silurian Niagaran Dolomite deep well (dolomitic — primary hardness contributor), Lake Michigan GLWA supply (moderately hard — secondary), and Ordovician calcareous formations (calcareous — tertiary contributor).
At 247.5 mg/L with TDS 608, La Grange Park's water is very hard. A water softener is strongly recommended to prevent rapid scale buildup. A reverse osmosis system is advisable for drinking water. The PFAS level of 8.6 ppt warrants a certified drinking water filter — O'Hare International Airport (Cook County — AFFF) and the west Chicago Cook County industrial corridor contribute to La Grange Park's elevated readings.
Geology & Source: La Grange Park in Cook County draws from the Illinois American Water on Lake Michigan (Cook County, northeast Illinois) — Lake Michigan at Cook County draws from Silurian Niagaran Dolomite (dolomitic) — but local blending with the highly mineralized Silurian dolomite groundwater produces very hard water — Illinois Cook County Lake Michigan-Silurian dolomite blend produces very hard water at 247.5 mg/L with TDS 608.5 mg/L.