Bolingbrook Water Hardness & Quality Report (2026)
Water Hardness
11.6 grains per gallon
Source
river
pH Level
8.2
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
424.9 mg/L
Est. Daily Cost
$0.53
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 Bolingbrook, your appliances are currently losing 26% efficiency due to mineral buildup.
| Appliance | In Bolingbrook | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 3 yrs | 8.5 yrs | -65% |
| Washing Machine | 6.3 yrs | 12 yrs | -48% |
| Water Heater | 7.7 yrs | 15 yrs | -49% |
Regional Water Comparison
How Bolingbrook compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Bolingbrook, Illinois | 198.5 mg/L | 7 ppt | 🔴 Very Hard | river |
| Woodridge, Illinois | 260.5 mg/L | 9.1 ppt | 🔴 Very Hard | river |
| Romeoville, Illinois | 168.5 mg/L | 6 ppt | 🟠 Hard | river |
| Lemont, Illinois | 115 mg/L | 4.2 ppt | 🟡 Moderately Hard | river |
| Lisle, Illinois | 151 mg/L | 5.4 ppt | 🟠 Hard | river |
National Benchmark
How Bolingbrook compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Bolingbrook | 198.5 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Bolingbrook's Water Unique?
Local geology and source profile
Bolingbrook, Illinois, in Will County and DuPage County at the southwestern edge of the Chicago metropolitan area (one of Chicago's fastest-growing suburbs in the 1990s-2000s, home of the Promenade Bolingbrook mall), draws its municipal water supply from Lake Michigan via the DuPage Water Commission and Illinois American Water (DuPage Division), distributed through the southwest DuPage–Will County suburban water grid. Bolingbrook is at the extended periphery of the Chicago metropolitan Lake Michigan distribution system. Water hardness in Bolingbrook measures 198.5 mg/L — classified as hard.
Bolingbrook's hard supply reflects the southwestern DuPage–Will County Lake Michigan distribution zone characteristics. As one of the more distant southwestern suburbs from Chicago's Lake Michigan treatment plants (Jardine WPP), Bolingbrook receives water through a long transmission distance through the DuPage Water Commission infrastructure and the extended southwest suburban distribution network. The DuPage County pipeline system traverses the glacial outwash plain of Will County — overlying the Silurian Niagaran Dolomite and Devonian Waukegan Formation at shallow depths — where older mains show mineral accumulation and possible local groundwater mixing. The 198.5 mg/L hardness reflects the substantial mineral accumulation through the extended southwest suburban distribution infrastructure.
At 198.5 mg/L, Bolingbrook residents face regular hard water challenges. Scale deposits form on faucet aerators, showerheads, and appliances within weeks — monthly descaling with citric acid solution is standard maintenance. DuPage Water Commission and Illinois American Water consistently deliver water meeting all Illinois EPA and federal EPA Safe Drinking Water Act requirements.
Geology & Source: Lake supply from Lake Michigan via the Illinois American Water (DuPage Division) or DuPage Water Commission — Lake Michigan water distributed through the southwest DuPage County suburban Chicago network; hard supply at 198.5 mg/L in Will County–DuPage County at the Chicago metropolitan fringe.