Lewisburg Water Hardness & Quality Report (2026)
Water Hardness
6 grains per gallon
Source
reservoir
pH Level
7.6
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
166.3 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 Lewisburg, your appliances are currently losing 14% efficiency due to mineral buildup.
| Appliance | In Lewisburg | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.2 yrs | 8.5 yrs | -27% |
| Washing Machine | 9.8 yrs | 12 yrs | -18% |
| Water Heater | 11.5 yrs | 15 yrs | -23% |
Regional Water Comparison
How Lewisburg compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Lewisburg, Tennessee | 102.5 mg/L | 3.5 ppt | 🟡 Moderately Hard | reservoir |
| Columbia, Tennessee | 198 mg/L | 6.7 ppt | 🔴 Very Hard | reservoir |
| Shelbyville, Tennessee | 102 mg/L | 3.4 ppt | 🟡 Moderately Hard | reservoir |
| Spring Hill, Tennessee | 89.5 mg/L | 3 ppt | 🟡 Moderately Hard | reservoir |
| Franklin, Tennessee | 103.5 mg/L | 3.5 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How Lewisburg compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Lewisburg | 102.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Lewisburg's Water Unique?
Local geology and source profile
Lewisburg, Tennessee, in Marshall County — a Marshall County city adjacent to Cornersville and Shelbyville on the Duck River in south-central Tennessee — receives its water from the City of Lewisburg Water Department, drawing from a local reservoir on the Duck River watershed through the south-central Tennessee distribution.
The moderately hard 102.5 mg/L hardness and TDS of 166.3 mg/L reflect the Marshall County Duck River supply's moderate calcareous character — the Ordovician Knox Dolomite and Cambrian Rome Formation are both calcareous formations in the Valley and Ridge Province of the Tennessee limestone plateau (compare Cornersville TN: 100/161 in Marshall County comparable; Shelbyville TN: 105/171 in Bedford County comparable; Lewisburg consistent moderate from the same Marshall County Duck River Ordovician-Cambrian calcareous supply). The Duck River watershed at Marshall County — Ordovician Knox Dolomite (slightly dolomitic — primary hardness contributor), Cambrian Rome Formation (calcareous — secondary contributor), and Quaternary Duck River alluvium (slightly calcareous — minor TDS).
At 102.5 mg/L with TDS 166, Lewisburg's water is moderately hard — mild scale buildup in appliances. Semi-annual descaling is appropriate. The PFAS level of 3.5 ppt is low — a clean result for south-central Tennessee. Review the City of Lewisburg's annual water quality report for the latest monitoring data.
Geology & Source: Lewisburg in Marshall County draws from the Lewisburg Water on Lewisburg Reservoir (Marshall County, south-central Tennessee) — the Duck River watershed at Marshall County drains Ordovician Knox Dolomite (slightly dolomitic) and Cambrian Rome Formation (calcareous) — Tennessee Marshall County Duck River Ordovician-Cambrian calcareous supply produces moderately hard water at 102.5 mg/L with TDS 166.3 mg/L.