Mount Juliet Water Hardness & Quality Report (2026)
Water Hardness
11.9 grains per gallon
Source
reservoir
pH Level
8.3
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
494.2 mg/L
Est. Daily Cost
$0.54
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 Mount Juliet, your appliances are currently losing 27% efficiency due to mineral buildup.
| Appliance | In Mount Juliet | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 2.9 yrs | 8.5 yrs | -66% |
| Washing Machine | 6.1 yrs | 12 yrs | -49% |
| Water Heater | 7.5 yrs | 15 yrs | -50% |
Regional Water Comparison
How Mount Juliet compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Mount Juliet, Tennessee | 203.5 mg/L | 6.8 ppt | 🔴 Very Hard | reservoir |
| Hermitage, Tennessee | 116 mg/L | 3.9 ppt | 🟡 Moderately Hard | reservoir |
| Hendersonville, Tennessee | 104.5 mg/L | 3.5 ppt | 🟡 Moderately Hard | reservoir |
| La Vergne, Tennessee | 170.5 mg/L | 5.7 ppt | 🟠 Hard | reservoir |
| Gallatin, Tennessee | 140 mg/L | 4.7 ppt | 🟠 Hard | reservoir |
National Benchmark
How Mount Juliet compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Mount Juliet | 203.5 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Mount Juliet's Water Unique?
Local geology and source profile
Mount Juliet, Tennessee, in Wilson County — a major east Nashville suburban community (Mount Juliet is one of the fastest-growing cities in Tennessee and one of the fastest-growing suburbs in the country — a Wilson County community in the I-40 east Nashville corridor that has seen explosive population growth driven by affordable housing relative to Nashville proper, proximity to Nashville via I-40 and BNA airport, and a significant new residential development pipeline), home of the Providence Marketplace (one of the largest lifestyle retail centers in the Nashville metro — a significant outdoor mall and entertainment complex in Mount Juliet), a diverse Wilson County community with a significant working-class, suburban professional, and country music industry population (many Nashville country music industry professionals live in Mount Juliet), and a community experiencing one of the most dramatic growth rates in Tennessee — draws its municipal water supply from Percy Priest Lake via the Mount Juliet Water System. Water hardness in Mount Juliet measures 203.5 mg/L — classified as very hard.
Mount Juliet's very hard supply reflects the Wilson County Nashville Basin Mississippian limestone geology. The Stones River watershed at Mount Juliet–Wilson County drains the Mississippian Ridley and Lebanon Limestone (highly calcareous marine carbonate). Limited softening produces the very hard 203.5 mg/L.
At 203.5 mg/L, Mount Juliet residents face significant hard water challenges. Regular water softeners and descaling are strongly recommended. Mount Juliet Water System consistently delivers water meeting all Tennessee DEC and EPA Safe Drinking Water Act requirements.
Geology & Source: Reservoir supply from the Percy Priest Lake (Stones River watershed) via the Tennessee American Water or Mount Juliet Water System — the Wilson County east Nashville suburban Mount Juliet corridor (Mississippian calcareous Ridley and Lebanon Limestone — the highly calcareous central Tennessee Nashville Basin carbonate platform; Wilson County supply with limited softening); very hard supply at 203.5 mg/L in Wilson County.