Warrenville Water Hardness & Quality Report (2026)
Water Hardness
8.6 grains per gallon
Source
river
pH Level
7.9
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
268.4 mg/L
Est. Daily Cost
$0.39
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 Warrenville, your appliances are currently losing 20% efficiency due to mineral buildup.
| Appliance | In Warrenville | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.7 yrs | 8.5 yrs | -45% |
| Washing Machine | 8.1 yrs | 12 yrs | -33% |
| Water Heater | 9.7 yrs | 15 yrs | -35% |
Regional Water Comparison
How Warrenville compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Warrenville, Illinois | 148 mg/L | 5.3 ppt | 🟠 Hard | river |
| Naperville, Illinois | 195 mg/L | 6.9 ppt | 🔴 Very Hard | river |
| West Chicago, Illinois | 179.5 mg/L | 6.3 ppt | 🟠 Hard | river |
| Wheaton, Illinois | 203 mg/L | 7.1 ppt | 🔴 Very Hard | river |
| Lisle, Illinois | 151 mg/L | 5.4 ppt | 🟠 Hard | river |
National Benchmark
How Warrenville compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Warrenville | 148 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Warrenville's Water Unique?
Local geology and source profile
Warrenville, Illinois, in DuPage County — a DuPage County city adjacent to Naperville and West Chicago on the Fox River in northeast Illinois — receives its water from the City of Warrenville Water, drawing from the Fox River (DuPage County) through the northeast Illinois distribution.
The moderately hard 148 mg/L hardness and TDS of 268.4 mg/L reflect the northeast Illinois DuPage County Fox River supply's moderate dolomitic character — softer than Village of Campton Hills IL (165.5 mg/L on the same Fox River, Kane County) due to the slightly different Fox River draw position and varying dolomite input along the Fox River corridor. The Fox River at DuPage County — Silurian Niagaran Dolomite (dolomitic — primary hardness contributor), Ordovician Galena Dolomite (dolomitic — secondary contributor), and Pleistocene calcareous glacial till (calcareous — TDS contributor).
At 148 mg/L, Warrenville's water is moderately hard — scale builds in kettles and appliances over months, dishwashers benefit from rinse aid, and faucet aerators need periodic cleaning. Quarterly descaling is appropriate. The PFAS level of 5.3 ppt warrants a certified drinking water filter — the DuPage County northeast Illinois industrial corridor contribute to Warrenville's readings.
Geology & Source: Warrenville in DuPage County draws from the City of Warrenville Water on the Fox River (DuPage County, northeast Illinois) — the Fox River at DuPage County drains through Silurian Niagaran Dolomite (dolomitic) and calcareous Pleistocene glacial till — Illinois DuPage County Fox River Silurian dolomitic calcareous supply produces moderately hard water at 148 mg/L with TDS 268.4 mg/L.