Fern Creek Water Hardness & Quality Report (2026)
Water Hardness
8.8 grains per gallon
Source
river
pH Level
7.9
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
308.8 mg/L
Est. Daily Cost
$0.40
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 Fern Creek, your appliances are currently losing 20% efficiency due to mineral buildup.
| Appliance | In Fern Creek | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.6 yrs | 8.5 yrs | -46% |
| Washing Machine | 8.1 yrs | 12 yrs | -33% |
| Water Heater | 9.6 yrs | 15 yrs | -36% |
Regional Water Comparison
How Fern Creek compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Fern Creek, Kentucky | 150 mg/L | 5 ppt | 🟠 Hard | river |
| Highview, Kentucky | 197.5 mg/L | 6.1 ppt | 🔴 Very Hard | river |
| Jeffersontown, Kentucky | 105.5 mg/L | 4 ppt | 🟡 Moderately Hard | river |
| Newburg, Kentucky | 195 mg/L | 6.1 ppt | 🔴 Very Hard | river |
| Okolona, Kentucky | 235 mg/L | 7 ppt | 🔴 Very Hard | river |
National Benchmark
How Fern Creek compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Fern Creek | 150 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Fern Creek's Water Unique?
Local geology and source profile
Fern Creek, Kentucky, in Jefferson County — an unincorporated Jefferson County community adjacent to Louisville and Middletown, in the southeast Jefferson County suburban corridor — receives its municipal water from the Louisville Water Company, drawing from the Ohio River at the Louisville Water Company Crescent Hill treatment facility.
The moderately hard 150 mg/L hardness and TDS of 308.8 mg/L are consistent with the Louisville Water Company Ohio River supply — similar to the Erlanger KY NKWD Ohio River supply (121 mg/L, TDS 229), though somewhat harder. Both the Louisville and Northern Kentucky Ohio River supplies draw from the same Ohio River at the Cincinnati Arch, with the Ordovician Cincinnatian Group limestone (carbonate platform) contributing the primary hardness to the Ohio River at Louisville.
At 150 mg/L, Fern Creek's water is moderately hard — scale builds in kettles and appliances over months, dishwashers benefit from rinse aid, and bathroom fixtures develop calcium deposits. Quarterly descaling is appropriate. The PFAS level of 5.0 ppt warrants a certified drinking water filter — the Louisville industrial corridor (Louisville Chemical Superfund legacy), the Fort Knox (Hardin County — AFFF in the Salt River-Ohio watershed), and the Ohio River PFAS background contribute to Fern Creek's readings.
Geology & Source: Fern Creek in Jefferson County draws from the Louisville Water Company on the Ohio River (Jefferson County) — the Ohio River at Louisville drains the Appalachian Plateau and the Cincinnati Arch (Ordovician Cincinnatian limestone, Devonian New Albany Shale) — Ohio River Ordovician Cincinnati Arch carbonate drainage produces moderately hard water at 150 mg/L with TDS 309 mg/L in this Jefferson County Kentucky community.