Elmhurst Water Hardness & Quality Report (2026)
Water Hardness
14 grains per gallon
Source
river
pH Level
8.5
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
580.2 mg/L
Est. Daily Cost
$0.64
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 Elmhurst, your appliances are currently losing 32% efficiency due to mineral buildup.
| Appliance | In Elmhurst | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.7 yrs | 8.5 yrs | -80% |
| Washing Machine | 4.7 yrs | 12 yrs | -61% |
| Water Heater | 6 yrs | 15 yrs | -60% |
Regional Water Comparison
How Elmhurst compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Elmhurst, Illinois | 240.5 mg/L | 8.4 ppt | 🔴 Very Hard | river |
| Northlake, Illinois | 254 mg/L | 8.8 ppt | 🔴 Very Hard | river |
| Villa Park, Illinois | 283.5 mg/L | 9.8 ppt | 🔴 Very Hard | river |
| Bensenville, Illinois | 144.5 mg/L | 5.1 ppt | 🟠 Hard | river |
| Addison, Illinois | 215.5 mg/L | 7.5 ppt | 🔴 Very Hard | river |
National Benchmark
How Elmhurst compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Elmhurst | 240.5 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Elmhurst's Water Unique?
Local geology and source profile
Elmhurst, Illinois, in DuPage County west of Chicago — an affluent Chicago west suburban community, home of Elmhurst University, the Lizzadro Museum of Lapidary Art, the Elmhurst Art Museum, and a premier Chicago west suburb with a strong Scandinavian-American heritage, one of the most appealing west suburban Chicago communities — draws its municipal water supply from Lake Michigan via the DuPage County Water Commission (DCWC) and the City of Elmhurst Water Division. Water hardness in Elmhurst measures 240.5 mg/L — classified as very hard.
Elmhurst's very hard supply — among the hardest Lake Michigan supply zone readings in the DuPage County system — reflects the east DuPage County suburban distribution infrastructure's significant mineral accumulation. Elmhurst is one of the oldest DuPage County suburbs (developed prominently in the 1900s–1930s as a railroad suburb on the Chicago & Pacific line), with distribution infrastructure including original cast-iron mains from the early 20th century Elmhurst suburban buildout. The DCWC system distributes Lake Michigan water through this moderately aged infrastructure, accumulating very substantial mineral content, producing the very hard 240.5 mg/L at Elmhurst household taps.
At 240.5 mg/L, Elmhurst residents face significant hard water challenges. Scale deposits form rapidly on all fixtures and tile — monthly descaling with citric acid solution is essential maintenance. City of Elmhurst Water Division 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 County Water Commission (DCWC) and the City of Elmhurst Water Division — the DuPage County Lake Michigan supply zone at the east DuPage County Elmhurst–Villa Park suburban corridor; very hard supply at 240.5 mg/L — reflecting the Elmhurst Lake Michigan distribution infrastructure's significant mineral accumulation.