Gallatin Water Hardness & Quality Report (2026)
Water Hardness
8.2 grains per gallon
Source
reservoir
pH Level
7.9
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
268.8 mg/L
Est. Daily Cost
$0.37
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 Gallatin, your appliances are currently losing 19% efficiency due to mineral buildup.
| Appliance | In Gallatin | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 5 yrs | 8.5 yrs | -41% |
| Washing Machine | 8.4 yrs | 12 yrs | -30% |
| Water Heater | 10 yrs | 15 yrs | -33% |
Regional Water Comparison
How Gallatin compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Gallatin, Tennessee | 140 mg/L | 4.7 ppt | 🟠 Hard | reservoir |
| Hendersonville, Tennessee | 104.5 mg/L | 3.5 ppt | 🟡 Moderately Hard | reservoir |
| Mount Juliet, Tennessee | 203.5 mg/L | 6.8 ppt | 🔴 Very Hard | reservoir |
| Portland, Tennessee | 196 mg/L | 6.6 ppt | 🔴 Very Hard | reservoir |
| Lebanon, Tennessee | 230 mg/L | 7.7 ppt | 🔴 Very Hard | reservoir |
National Benchmark
How Gallatin compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Gallatin | 140 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
Bring Badger-quality water to your Gallatin home
Shop water softeners on Amazon.com →
What Makes Gallatin's Water Unique?
Local geology and source profile
Gallatin, Tennessee, the Sumner County seat — a major north Nashville suburban community (Gallatin is the Sumner County seat and the largest city in Sumner County — a rapidly growing north Nashville suburban community on Old Hickory Lake along the Cumberland River), home of Volunteer State Community College (a major community college serving Sumner County and the greater north Nashville area), a diverse Sumner County community with a significant working-class and manufacturing professional population, and adjacent to Old Hickory Lake (a major Cumberland River TVA reservoir — one of the most popular lakes in the middle Tennessee area for recreational boating and fishing) — draws its municipal water supply from Old Hickory Lake (Cumberland River) via the City of Gallatin Water Division. Water hardness in Gallatin measures 140 mg/L — classified as moderately hard.
Gallatin's moderate hardness reflects the central Tennessee Cumberland River watershed's calcareous Paleozoic carbonate geology. The Cumberland River (Old Hickory Lake) at Gallatin–Sumner County draws from: the Ordovician Knox Dolomite (highly calcareous dolomite of the central Tennessee Plateau); the Mississippian Warsaw Limestone (highly calcareous marine limestone of the Highland Rim); and the Mississippian Fort Payne Formation (calcareous chert and limestone). City of Gallatin treatment produces the moderate 140 mg/L.
At 140 mg/L, Gallatin residents encounter moderate scale accumulation. Monthly cleaning with citric acid solution is recommended. City of Gallatin Water Division consistently delivers water meeting all Tennessee TDEC and EPA Safe Drinking Water Act requirements.
Geology & Source: River supply from the Old Hickory Lake (Cumberland River) via the City of Gallatin Water Division — the Sumner County central Tennessee Nashville north suburban Cumberland River corridor (Ordovician Knox Dolomite and Mississippian Warsaw and Fort Payne Limestone — the highly calcareous central Tennessee Paleozoic carbonate; Cumberland River supply with treatment); moderately hard supply at 140 mg/L in Sumner County.