Westchester Water Hardness & Quality Report (2026)
Water Hardness
11.2 grains per gallon
Source
river
pH Level
8.2
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
403.1 mg/L
Est. Daily Cost
$0.51
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 Westchester, your appliances are currently losing 26% efficiency due to mineral buildup.
| Appliance | In Westchester | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 3.3 yrs | 8.5 yrs | -61% |
| Washing Machine | 6.5 yrs | 12 yrs | -46% |
| Water Heater | 7.9 yrs | 15 yrs | -47% |
Regional Water Comparison
How Westchester compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Westchester, Illinois | 192 mg/L | 6.8 ppt | 🔴 Very Hard | river |
| La Grange Park, Illinois | 247.5 mg/L | 8.6 ppt | 🔴 Very Hard | river |
| Bellwood, Illinois | 139 mg/L | 5 ppt | 🟠 Hard | river |
| Brookfield, Illinois | 229 mg/L | 8 ppt | 🔴 Very Hard | river |
| Western Springs, Illinois | 193.5 mg/L | 6.8 ppt | 🔴 Very Hard | river |
National Benchmark
How Westchester compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Westchester | 192 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Westchester's Water Unique?
Local geology and source profile
Westchester, Illinois, in Cook County — a Cook County village adjacent to Maywood and Hillside in the west suburban Chicago metro — receives its municipal water from Illinois American Water, drawing from Lake Michigan through the Illinois American Water west suburban Chicago distribution system (Cook County).
The hard 192 mg/L hardness and TDS of 403.1 mg/L reflect the west suburban Chicago Lake Michigan supply. Lake Michigan drains the Great Lakes basin — Silurian Niagara Dolomite (the dominant Great Lakes carbonate platform), Ordovician Galena Dolomite and Platteville Limestone (calcareous), and calcareous Pleistocene Lake Michigan Lobe till (ground-up dolomite and limestone). The Illinois American Water west suburban distribution infrastructure (older pipe networks in mature Cook County suburbs) may contribute additional mineral leaching, producing the moderately elevated hardness relative to the central Chicago reading.
At 192 mg/L, Westchester's water is hard — scale builds steadily in kettles and appliances, dishwashers benefit from rinse aid, and water heaters should be descaled annually. Monthly descaling is recommended. The PFAS level of 6.8 ppt warrants a certified drinking water filter — the west Cook County suburban industrial corridor, the Chicago west side PFAS legacy, and the Great Lakes PFAS background contribute to Westchester's readings.
Geology & Source: Westchester in Cook County draws from Illinois American Water on Lake Michigan (Cook County, west suburban Chicago) — Lake Michigan drains the Great Lakes basin (Silurian Niagara Dolomite, Ordovician Galena-Platteville, calcareous Pleistocene Lake Michigan Lobe till) — Illinois Cook County Lake Michigan Great Lakes carbonate basin produces hard water at 192 mg/L with TDS 403.1 mg/L in this Cook County Illinois village.