Rantoul Water Hardness & Quality Report (2026)
Water Hardness
5.9 grains per gallon
Source
river
pH Level
7.5
neutral = 7.0
Lead
0.001 mg/L
✓ Below action level
TDS
153.2 mg/L
Est. Daily Cost
$0.27
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 Rantoul, your appliances are currently losing 14% efficiency due to mineral buildup.
| Appliance | In Rantoul | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.3 yrs | 8.5 yrs | -26% |
| Washing Machine | 9.8 yrs | 12 yrs | -18% |
| Water Heater | 11.5 yrs | 15 yrs | -23% |
Regional Water Comparison
How Rantoul compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Rantoul, Illinois | 101.5 mg/L | 3.7 ppt | 🟡 Moderately Hard | river |
| Urbana, Illinois | 264.5 mg/L | 9.2 ppt | 🔴 Very Hard | river |
| Champaign, Illinois | 149.5 mg/L | 5.3 ppt | 🟠 Hard | river |
| Danville, Illinois | 127 mg/L | 4.6 ppt | 🟠 Hard | river |
| Charleston, Illinois | 244.5 mg/L | 8.5 ppt | 🔴 Very Hard | river |
National Benchmark
How Rantoul compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Rantoul | 101.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Rantoul's Water Unique?
Local geology and source profile
Rantoul, Illinois, in Champaign County — a Champaign County village adjacent to Champaign and Urbana in east-central Illinois — receives its water from the Village of Rantoul Water, drawing from the Mahomet Aquifer or local Champaign County supply (Champaign County) through the east-central Illinois distribution.
The moderately hard 101.5 mg/L hardness and TDS of 153.2 mg/L reflect the east-central Illinois Champaign County supply's moderate calcareous character — the Quaternary Mahomet Aquifer outwash gravels and Pennsylvanian calcareous contacts contribute moderate hardness consistent with the central Illinois communities on the Mahomet Aquifer (compare Western Springs IL: 153 mg/L; Warrenville IL: 177.5 mg/L on harder Fox River supply). The Mahomet Aquifer at Champaign County — Quaternary Mahomet outwash gravels (slightly calcareous — primary hardness contributor), Pennsylvanian Spoon Formation (calcareous — secondary contributor), and Silurian Niagaran Dolomite (dolomitic — deep background).
At 101.5 mg/L, Rantoul'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 3.7 ppt is relatively low — warrants routine monitoring but no urgent filtration. Note: Chanute Air Force Base (former Rantoul base — AFFF) has been a contributor to Champaign County groundwater contamination.
Geology & Source: Rantoul in Champaign County draws from the Village of Rantoul Water on the Mahomet Aquifer (Champaign County, east-central Illinois) — the Mahomet Aquifer at Champaign County is developed in Quaternary outwash sand-gravel (slightly calcareous) and Pennsylvanian Spoon Formation (calcareous) — Illinois Champaign County Mahomet Aquifer Quaternary-Pennsylvanian calcareous supply produces moderately hard water at 101.5 mg/L with TDS 153.2 mg/L.