Danville Water Hardness & Quality Report (2026)
Water Hardness
7.4 grains per gallon
Source
river
pH Level
7.7
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
212.8 mg/L
Est. Daily Cost
$0.34
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 Danville, your appliances are currently losing 17% efficiency due to mineral buildup.
| Appliance | In Danville | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 5.4 yrs | 8.5 yrs | -36% |
| Washing Machine | 8.9 yrs | 12 yrs | -26% |
| Water Heater | 10.5 yrs | 15 yrs | -30% |
Regional Water Comparison
How Danville compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Danville, Illinois | 127 mg/L | 4.6 ppt | 🟠 Hard | river |
| 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 |
| Terre Haute, Indiana | 189.5 mg/L | 5.9 ppt | 🔴 Very Hard | river |
National Benchmark
How Danville compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Danville | 127 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Danville's Water Unique?
Local geology and source profile
Danville, Illinois, in Vermilion County — a major east Illinois city (Danville is the Vermilion County seat — one of the most significant east Illinois cities at the Indiana border, historically an important coal mining, manufacturing, and agricultural hub in the Wabash Valley region; Danville reached its peak population around 1950 as a major Midwest industrial city and has declined significantly since), birthplace of notable Americans (Danville's most famous native sons include Dick Van Dyke — the legendary comedian and actor of The Dick Van Dyke Show and Mary Poppins fame — and Gene Hackman, the Academy Award-winning actor; Danville claims an unusually high per-capita celebrity birthrate for its size), a diverse Vermilion County community with a primarily working-class heritage, adjacent to the Indiana border and Hoopeston in the north Vermilion County corridor — draws its municipal water supply from the Middle Fork Vermilion River (Lake Vermilion) via the City of Danville Water Division. Water hardness in Danville measures 127 mg/L — classified as moderately hard.
Danville's moderate hardness reflects the Vermilion County east Illinois carboniferous watershed geology. The Middle Fork Vermilion River drains the Pennsylvanian Carbondale and Modesto Formations (calcareous-moderate coal-bearing terrain). City of Danville treatment produces the moderate 127 mg/L.
At 127 mg/L, Danville residents encounter moderate scale accumulation. Monthly cleaning is recommended. City of Danville Water Division consistently delivers water meeting all Illinois EPA and EPA Safe Drinking Water Act requirements.
Geology & Source: River supply from the Middle Fork Vermilion River (Lake Vermilion) via the City of Danville Water Division — the Vermilion County east Illinois Wabash Valley corridor (Pennsylvanian calcareous-moderate Carbondale and Modesto coal and shale — the calcareous-moderate east Illinois carboniferous terrain; Danville Vermilion River supply with treatment); moderately hard supply at 127 mg/L in Vermilion County.