Jeffersontown Water Hardness & Quality Report (2026)
Water Hardness
6.2 grains per gallon
Source
river
pH Level
7.6
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
189.6 mg/L
Est. Daily Cost
$0.28
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 Jeffersontown, your appliances are currently losing 14% efficiency due to mineral buildup.
| Appliance | In Jeffersontown | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.1 yrs | 8.5 yrs | -28% |
| Washing Machine | 9.7 yrs | 12 yrs | -19% |
| Water Heater | 11.4 yrs | 15 yrs | -24% |
Regional Water Comparison
How Jeffersontown compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Jeffersontown, Kentucky | 105.5 mg/L | 4 ppt | 🟡 Moderately Hard | river |
| Fern Creek, Kentucky | 150 mg/L | 5 ppt | 🟠 Hard | river |
| Highview, Kentucky | 197.5 mg/L | 6.1 ppt | 🔴 Very Hard | river |
| Newburg, Kentucky | 195 mg/L | 6.1 ppt | 🔴 Very Hard | river |
| Saint Matthews, Kentucky | 161 mg/L | 5.3 ppt | 🟠 Hard | river |
National Benchmark
How Jeffersontown compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Jeffersontown | 105.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Jeffersontown's Water Unique?
Local geology and source profile
Jeffersontown, Kentucky, in Jefferson County — a major east Louisville suburban community (Jeffersontown is a significant Jefferson County city — an east Louisville suburb adjacent to Louisville proper and Middletown; Jeffersontown is one of the most important east Louisville suburban employment centers (the Jeffersontown corridor along Bluegrass Parkway has a significant concentration of logistics, technology, and business park employment — the area is known locally as 'J-Town'; General Electric's major Appliance Park facility is in the broader Louisville–Jefferson County corridor, and the Jeffersontown area benefits from this industrial and corporate concentration)); Jeffersontown is home of the Gaslight Square (a historic commercial district in Jeffersontown that has been revitalized as a restaurant and boutique retail destination in the east Louisville suburban corridor), a diverse Jefferson County community with a primarily suburban professional, manufacturing, and diverse working-class and middle-class Louisville metropolitan population — draws its municipal water supply from the Ohio River via the Louisville Water Company. Water hardness in Jeffersontown measures 105.5 mg/L — classified as moderately hard.
Jeffersontown's moderate hardness reflects the north Kentucky Jefferson County Ohio River Valley's calcareous character. The Ohio River at Louisville carries dissolved carbonates from the upper Midwest, and Louisville Water Company treatment produces the moderate 105.5 mg/L.
At 105.5 mg/L, Jeffersontown residents encounter moderate scale accumulation. Monthly cleaning is recommended. Louisville Water Company consistently delivers water meeting all Kentucky DEP and EPA Safe Drinking Water Act requirements.
Geology & Source: River supply from the Ohio River via the Louisville Water Company — the Jefferson County north Kentucky Louisville suburban Jeffersontown corridor (Ordovician calcareous Ohio River Valley limestone — the calcareous north Kentucky Jefferson County Ohio River Valley corridor; effective treatment); moderately hard supply at 105.5 mg/L in Jefferson County.