Glendale Heights Water Hardness & Quality Report (2026)
Water Hardness
15.6 grains per gallon
Source
river
pH Level
8.5
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
692 mg/L
Est. Daily Cost
$0.71
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 Glendale Heights, your appliances are currently losing 36% efficiency due to mineral buildup.
| Appliance | In Glendale Heights | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 3.7 yrs | 12 yrs | -69% |
| Water Heater | 5 yrs | 15 yrs | -67% |
Regional Water Comparison
How Glendale Heights compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Glendale Heights, Illinois | 267.5 mg/L | 9.3 ppt | 🔴 Very Hard | river |
| Glen Ellyn, Illinois | 256.5 mg/L | 8.9 ppt | 🔴 Very Hard | river |
| Bloomingdale, Illinois | 190.5 mg/L | 6.7 ppt | 🔴 Very Hard | river |
| Wheaton, Illinois | 203 mg/L | 7.1 ppt | 🔴 Very Hard | river |
| Lombard, Illinois | 172 mg/L | 6.1 ppt | 🟠 Hard | river |
National Benchmark
How Glendale Heights compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Glendale Heights | 267.5 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Glendale Heights's Water Unique?
Local geology and source profile
Glendale Heights, Illinois, in DuPage County — a major west suburban Chicago community in DuPage County (Glendale Heights is a significant DuPage County community in the west Chicago suburban ring — a primarily working-class and middle-class community in the I-355 corridor), a diverse DuPage County community with a significant Latino-American (particularly Mexican-American and Puerto Rican-American), South Asian-American, and Eastern European-American population, adjacent to Bloomingdale and Carol Stream in the west DuPage County suburban corridor, and a community with a large manufacturing and distribution sector workforce — draws its municipal water supply from Lake Michigan via the DuPage Water Commission. Water hardness in Glendale Heights measures 267.5 mg/L — classified as very hard.
Glendale Heights's very hard supply — significantly harder than Chicago's in-city delivery — reflects the DuPage County distribution characteristics and distribution-zone mineral accumulation. The DuPage Water Commission purchases wholesale Lake Michigan water from Chicago (raw hardness approximately 140–160 mg/L) and distributes through the west suburban DuPage County system. The west DuPage County distribution to Glendale Heights involves additional pipeline length and older suburban mains (1960s–1970s west suburban infrastructure), producing the very hard 267.5 mg/L.
At 267.5 mg/L, Glendale Heights residents face severe hard water challenges. Weekly descaling and appliance protection measures are strongly recommended. DuPage Water Commission consistently delivers water meeting all Illinois EPA and federal EPA Safe Drinking Water Act requirements.
Geology & Source: Lake supply from Lake Michigan via the DuPage Water Commission (Chicago wholesale) — the DuPage County west suburban Chicago corridor (Lake Michigan calcareous-moderate freshwater supply — DuPage Water Commission treatment and distribution to Glendale Heights DuPage County zone; with distribution hardness accumulation); very hard supply at 267.5 mg/L in DuPage County.