Lebanon Water Hardness & Quality Report (2026)
Water Hardness
~120–179 mg/L
Hardestimated · not lab-verified
Source
reservoir
pH Level
8.5
neutral = 7.0
Lead
0.009 mg/L
✓ Below action level
TDS
606.7 mg/L
Est. Daily Cost
$0.40
energy & soap waste
Source: See methodology section below · 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 Lebanon, your appliances are currently losing 20% efficiency due to mineral buildup.
| Appliance | In Lebanon | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.8 yrs | 8.5 yrs | -20% |
| Washing Machine | 9.6 yrs | 12 yrs | -20% |
| Water Heater | 12 yrs | 15 yrs | -20% |
Regional Water Comparison
How Lebanon compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Lebanon, Tennessee | ≈ 120–179 mg/L | 0 ppt | 🟠 Hard | reservoir |
| Mount Juliet, Tennessee | ≈ 120–179 mg/L | 0 ppt | 🟠 Hard | reservoir |
| Gallatin, Tennessee | 140 mg/L | 0 ppt | 🟠 Hard | reservoir |
| Smyrna, Tennessee | ≈ 120–179 mg/L | 151.2 ppt | 🟠 Hard | reservoir |
| Hermitage, Tennessee | ≈ 120–179 mg/L | 3.9 ppt | 🟠 Hard | reservoir |
National Benchmark
How Lebanon compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Lebanon | ≈ 120–179 mg/L | 🟠 Moderate |
| USA National Avg | 151 mg/L | 🟠 Moderate |
| Scarsdale Top Rated | 0.02 mg/L | 🟢 None |
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What Makes Lebanon's Water Unique?
Local geology and source profile
The Lebanon Water System serves the city of Lebanon and surrounding areas in Wilson County, Tennessee. Water is drawn from the Cumberland River and treated at the local treatment plant through conventional processes including disinfection and disinfection byproduct control. The system meets state and federal standards as detailed in annual Consumer Confidence Reports available on the city's official website, with high marks for legal compliance in recent reporting periods.
The Cumberland River watershed, part of the larger Ohio River basin, traverses the Eastern Highland Rim and Central Basin of Tennessee. Mississippian limestone formations — including the Warsaw and Fort Payne Formations — dissolve readily, imparting a moderately mineralised character to the surface water. Karst features enhance mineral pickup without heavy sediment load, shaping a supply with notable dissolved solids from Paleozoic carbonate rocks, distinct from softer waters sourced from sandstone aquifers elsewhere in the state.
At moderately hard levels, scale buildup affects water heaters, dishwashers, and faucets, reducing efficiency and lifespan while leaving spots on glassware. Regular maintenance such as deliming appliances and using rinse aids helps mitigate issues; a whole-home water softener is often recommended for households experiencing frequent scaling or dry skin. Water quality reports indicate compliance with EPA standards, though 10 contaminants — including Total Trihalomethanes (TTHMs) and Monobromoacetic acid — exceed health advocacy guidelines despite legal limits being met. Residents can request independent lead testing for additional peace of mind.
Geology & Source: Cumberland River, Central Basin; Mississippian-age limestone and dolomite — Warsaw and Fort Payne Formations dissolve calcium and magnesium through karst topography; moderately mineralised character distinct from softer sandstone-aquifer areas of
Other Tennessee Water Reports
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Frequently Asked Questions
Is Lebanon's water safe to drink?
Do I need a water softener in Lebanon?
How does Lebanon compare to the USA average?
Data Sources & Methodology
Water quality data for Lebanon is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.
Water Hardness
Modelled estimate based on state-level USGS geological survey data for this region. No direct USGS Water Quality Portal measurement was matched to this city — the value reflects a statistical range calibrated to the state's dominant rock types and typical source water characteristics.
pH
Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.
TDS — Total Dissolved Solids
Estimated using a derived ratio from water hardness and regional conductance profiles. TDS in natural water correlates strongly with total mineral content including hardness ions.
PFAS — Perfluoroalkyl and Polyfluoroalkyl Substances
EPA UCMR5 (5th Unregulated Contaminant Monitoring Rule, 2023–2025) — sum of PFAS compounds detected at the public water system serving this city. A value of 0 indicates the system was sampled with no detection above reporting limits.
Lead
Modelled estimate based on the EPA Lead and Copper Rule 90th-percentile tap-sample methodology. No publicly available per-city lead dataset with sufficient national coverage exists. Values are a conservative baseline derived from city population tier and infrastructure age — all estimates are maintained below the EPA action level of 0.015 mg/L.
Appliance Lifespan
Calculated from water hardness using a linear degradation model. Baseline lifespans represent soft-water performance (kettle: 8.5 yrs, washing machine: 12.0 yrs, water heater: 15.0 yrs). Hard water mineral scale progressively reduces operational life in direct proportion to hardness concentration.