How does Gallatin's water compare to the national average?

The USA national average is 151 mg/L. Gallatin (140 mg/L) is 11 mg/L softer than average.

Gallatin Water Hardness & Quality Report (2026)

Water Hardness

140mg/L

Hard

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: See methodology section below · Updated 2026

140mg/L as CaCO₃Hard

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	6.9 yrs	8.5 yrs	-19%
Washing Machine	9.7 yrs	12 yrs	-19%
Water Heater	12.2 yrs	15 yrs	-19%

Regional Water Comparison

How Gallatin compares to its nearest neighbours

City	Hardness	Risk	Source
▶ Gallatin, Tennessee	140 mg/L	🟠 Hard	reservoir
Hendersonville, Tennessee	≈ 120–179 mg/L	🟠 Hard	reservoir
Mount Juliet, Tennessee	≈ 120–179 mg/L	🟠 Hard	reservoir
Portland, Tennessee	≈ 120–179 mg/L	🟠 Hard	reservoir
White House, Tennessee	≈ 120–179 mg/L	🟠 Hard	reservoir

National Benchmark

How Gallatin compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Gallatin	140 mg/L	🟠 Moderate
USA National Avg	151 mg/L	🟠 Moderate
Scarsdale Top Rated	0.02 mg/L	🟢 None

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What Makes Gallatin's Water Unique?

Local geology and source profile

Source: ReservoirTDS: 268.8 mg/LpH: 7.9

The Gallatin Water Department, operated by Gallatin Public Utilities, serves over 42,000 residents across Sumner County, Tennessee. The utility sources its water from surface water — specifically reservoirs in the Cumberland River basin — treated at the Gallatin Water Treatment Plant using conventional methods including hypochlorite disinfection. The 2026 water quality grade is B (good with minor concerns) per Tap Water Data. For inquiries, contact the department at 615-451-5922 or 239 Hancock St, Gallatin, TN 37066.

Gallatin's supply originates in the Cumberland River watershed, characterized by karst landscapes in the Nashville Basin. Water interacts with Ordovician-age limestones and dolomites, including the Stones River and Carters formations, which dissolve to release calcium and magnesium ions. No primary aquifer is tapped directly, but surface runoff through these carbonate terrains shapes a moderately mineralised supply — the reactive geology imparts characteristic hardness signatures to the reservoir water.

Scale buildup from hard water affects water heaters, dishwashers, and washing machines most, reducing efficiency and lifespan. Soap lathering diminishes, leaving spots on dishes and causing skin dryness. Regular vinegar descaling and magnetic conditioners help manage deposits, but a whole-house softener is recommended to prevent plumbing clogs and extend appliance life. Testing detects 7 contaminants, with 6 — including Bromodichloromethane, Chloroform, Chromium-6, Nitrates, Radium, and Total Trihalomethanes — exceeding health advocacy guidelines though remaining below EPA legal limits; conventional filtration and hypochlorite disinfection are applied.

Geology & Source: Cumberland River watershed karst; Ordovician Cynthiana and Lexington Limestones dominate Central Basin — dissolved calcium and magnesium from carbonate sinkholes and springs impart hardness to reservoir supply

Other Tennessee Water Reports

Hendersonville

≈ 120–179 mg/L

🟠 Hard

Mount Juliet

≈ 120–179 mg/L

🟠 Hard

Portland

≈ 120–179 mg/L

🟠 Hard

White House

≈ 120–179 mg/L

🟠 Hard

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Notice an error or missing data? Help us keep this page accurate. If you spot incorrect water hardness, outdated utility info, or missing details, please let us know.

All reports are reviewed by our team. Thank you for supporting data quality!

Frequently Asked Questions

Is Gallatin's water safe to drink?

Yes. Gallatin's water meets all federal safety standards. The hardness is 140 mg/L (Hard), which is safe to drink. High hardness affects appliances and taste, but poses no health risk.

Do I need a water softener in Gallatin?

At 140 mg/L (Hard), Gallatin's water will cause significant limescale on kettles, washing machines, and water heaters. A water softener or descaler is strongly recommended to extend appliance lifespan and reduce energy bills by up to 19%.

How does Gallatin compare to the USA average?

The USA national average is 151 mg/L. Gallatin (140 mg/L) is 11 mg/L below the national average. The softest major city is Scarsdale at just 0.02 mg/L.

Data Sources & Methodology

Water quality data for Gallatin is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.

Estimated

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.

Estimated

Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.

Estimated

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.

Measured

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.

Modelled

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.

Calculated

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.