La Vergne Water Hardness & Quality Report (2026)
Water Hardness
10 grains per gallon
Source
reservoir
pH Level
8.1
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
369.3 mg/L
Est. Daily Cost
$0.45
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 La Vergne, your appliances are currently losing 23% efficiency due to mineral buildup.
| Appliance | In La Vergne | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4 yrs | 8.5 yrs | -53% |
| Washing Machine | 7.3 yrs | 12 yrs | -39% |
| Water Heater | 8.8 yrs | 15 yrs | -41% |
Regional Water Comparison
How La Vergne compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ La Vergne, Tennessee | 170.5 mg/L | 5.7 ppt | 🟠 Hard | reservoir |
| Smyrna, Tennessee | 190.5 mg/L | 6.4 ppt | 🔴 Very Hard | reservoir |
| Hermitage, Tennessee | 116 mg/L | 3.9 ppt | 🟡 Moderately Hard | reservoir |
| Mount Juliet, Tennessee | 203.5 mg/L | 6.8 ppt | 🔴 Very Hard | reservoir |
| Brentwood Estates, Tennessee | 123 mg/L | 4.2 ppt | 🟠 Hard | reservoir |
National Benchmark
How La Vergne compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ La Vergne | 170.5 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes La Vergne's Water Unique?
Local geology and source profile
La Vergne, Tennessee, in Rutherford County — a major southeast Nashville suburban community (La Vergne is one of the fastest-growing cities in Rutherford County — a rapidly expanding Nashville southeast suburban community in the booming I-24 corridor between Nashville and Murfreesboro), a major logistics and distribution hub in middle Tennessee (La Vergne and the Rutherford County I-24 corridor hosts significant Amazon, Nissan, and automotive parts distribution operations — one of the most logistics-dense corridors in the Nashville metro), a diverse Rutherford County community with a significant working-class, Latin-American, and automotive industry professional population, and adjacent to the major Nissan North America operations in Smyrna — draws its municipal water supply from the Stones River watershed via the City of La Vergne. Water hardness in La Vergne measures 170.5 mg/L — classified as hard.
La Vergne's hard supply reflects the central Tennessee Stones River watershed's calcareous Paleozoic carbonate geology. The Stones River (Percy Priest Lake) at La Vergne–Rutherford County draws from: the Ordovician Knox Dolomite (highly calcareous dolomite — the primary central Tennessee Ordovician aquifer and stream bedrock); the Mississippian Warsaw, Salem, and Fort Payne Formations (highly calcareous limestone and chert); and the Middle Tennessee Highland Rim calcareous limestone terrain. City of La Vergne's treatment produces the hard 170.5 mg/L.
At 170.5 mg/L, La Vergne residents face regular hard water challenges. Monthly descaling with citric acid solution is recommended. City of La Vergne Water Division consistently delivers water meeting all Tennessee TDEC and EPA Safe Drinking Water Act requirements.
Geology & Source: River supply from the Percy Priest Lake (Stones River watershed) via the City of La Vergne Water Division or Tennessee American Water — the Rutherford County central Tennessee Nashville southeast suburban corridor (Ordovician Knox Dolomite and Mississippian Warsaw and Fort Payne Limestone — the highly calcareous central Tennessee Paleozoic carbonate; Stones River watershed supply with treatment); hard supply at 170.5 mg/L in Rutherford County.