Danville Water Hardness & Quality Report (2026)
Water Hardness
10.7 grains per gallon
Source
river
pH Level
8.2
neutral = 7.0
Lead
0.006 mg/L
✓ Below action level
TDS
410.1 mg/L
Est. Daily Cost
$0.49
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 24% efficiency due to mineral buildup.
| Appliance | In Danville | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 3.6 yrs | 8.5 yrs | -58% |
| Washing Machine | 6.8 yrs | 12 yrs | -43% |
| Water Heater | 8.3 yrs | 15 yrs | -45% |
Regional Water Comparison
How Danville compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Danville, Kentucky | 182.5 mg/L | 5.8 ppt | 🔴 Very Hard | river |
| Nicholasville, Kentucky | 199.5 mg/L | 6.2 ppt | 🔴 Very Hard | river |
| Lexington, Kentucky | 245.5 mg/L | 7.3 ppt | 🔴 Very Hard | river |
| Berea, Kentucky | 157.5 mg/L | 5.2 ppt | 🟠 Hard | river |
| Richmond, Kentucky | 60.5 mg/L | 2.9 ppt | 🟡 Moderately Hard | river |
National Benchmark
How Danville compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Danville | 182.5 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Danville's Water Unique?
Local geology and source profile
Danville, Kentucky, in Boyle County — the Boyle County seat adjacent to Perryville and Junction City on the Dix River in the central Kentucky Bluegrass region — receives its municipal water from the Danville Water Division, drawing from Herrington Lake (Dix River reservoir, Boyle County) through the Danville treatment plant.
The hard 182.5 mg/L hardness and TDS of 410.1 mg/L reflect the central Kentucky Bluegrass region's intense carbonate character. The Dix River at Boyle County drains the Kentucky Inner Bluegrass — Ordovician Lexington Limestone (the dominant Inner Bluegrass carbonate platform — very high purity limestone, the source of the Bluegrass region's characteristic very hard water), Ordovician Clays Ferry Formation (calcareous), and minor Devonian Ohio Shale (calcareous). The Inner Bluegrass Ordovician Lexington Limestone is one of the purest and most soluble limestone formations in North America, producing the hard central Kentucky supply.
At 182.5 mg/L, Danville's water is hard — scale builds steadily in kettles and appliances, dishwashers benefit from rinse aid, and water heaters should be descaled annually. Monthly descaling is recommended. The PFAS level of 5.8 ppt warrants a certified drinking water filter — the Boyle County central Kentucky light-industrial corridor, the Dix River agricultural watershed, and the central Kentucky PFAS background from industrial and military sources contribute to Danville's readings.
Geology & Source: Danville in Boyle County draws from the Danville Water Division on Herrington Lake (Dix River, Boyle County, central Kentucky) — the Dix River drains the Kentucky Limestone Basin (Ordovician Lexington Limestone, Devonian Ohio Shale calcareous — the Inner Bluegrass carbonate platform) — Kentucky Boyle County Dix River Ordovician carbonate watershed produces hard water at 182.5 mg/L with TDS 410.1 mg/L in this Boyle County Kentucky city.