How hard is the water in Lebanon, TN?

Tap water hardness
78mg/L
4.5gpg
Moderately hard

Reported by Lebanon Water System · December 2024

TN typical
89 mg/L
EPA health violations since 2016
0
Softener for 3 people
24k grain
Data
Utility report

Lebanon water measures 78 mg/L (4.5 gpg) of hardness, moderately hard by USGS standards. The number comes from Lebanon Water System, dated December 2024.

Lebanon on the hardness scale, with nearby cities
060120180240300360+TN typical 89Gallatin: 82 mg/LGallatin 82Mount Juliet: 89 mg/LMount Juliet 89Green Hill: 89 mg/LGreen Hill 89Hendersonville: 89 mg/LHendersonville 89Goodlettsville: 89 mg/LGoodlettsville 89Millersville: 89 mg/LMillersville 89Nashville: 89 mg/LNashville 89Murfreesboro: 101 mg/LMurfreesboro 101La Vergne: 200 mg/LLa Vergne 200Smyrna: 200 mg/LSmyrna 200Lebanon 78mg/L as calcium carbonate060120180240300360+TN 89Gallatin: 82 mg/LGallatin 82Mount Juliet: 89 mg/LMount Juli. 89Green Hill: 89 mg/LGreen Hill 89Hendersonville: 89 mg/LHendersonv. 89La Vergne: 200 mg/LLa Vergne 200Smyrna: 200 mg/LSmyrna 20078 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Lebanon sits 11 mg/L below the typical Tennessee figure of 89. None of the 10 nearest cities we track has softer water. The range nearby runs from 82 mg/L in Gallatin to 200 in La Vergne.

What 78 mg/L means at home

You may see faint white spots on glasses and shower doors after the water dries.

Scale builds up slowly. A kettle or coffee maker needs descaling now and then, maybe every few months.

Hardness is not a health problem, and EPA sets no limit for it. It is a matter of scale and soap.

What to do about it

Optional. Plenty of households at this level live with it and descale the kettle now and then.

Water softener

Worth a look if spots on glass bother you, or if your tankless water heater manual asks for softer water.

Carbon filter

Improves taste and removes chlorine. It leaves calcium and magnesium in place.

Softener size for Lebanon

3 people × 75 gallons a day × 4.5 gpg = 1,019 grains a day. A 24,000-grain unit regenerates about every 23 days.

Size it for your household

EPA record for Lebanon's water system

Lebanon Water System · PWSID TN0000393

No health-based violations since 2016

Serves about 60,669 people from surface water.

Health-based
0
Monitoring or reporting
0
Open now
0

Health-based means a contaminant above its legal limit or a missed treatment step. Monitoring and reporting violations are late or missing tests and notices. Source: EPA ECHO, 2026Q3 export, violations with periods starting 2016 or later. Full EPA record.

Questions

Is Lebanon water hard?

Somewhat. It measures about 78 mg/L (4.5 grains per gallon), which the USGS classes as moderately hard.

What is the water hardness in Lebanon in grains per gallon?

About 4.5 gpg. One grain per gallon equals 17.1 mg/L, so 78 mg/L divided by 17.1 gives 4.5.

What size water softener do I need in Lebanon?

For 3 people using 75 gallons each per day, 4.5 gpg works out to about 1,019 grains a day. A 24,000-grain softener covers that with a regeneration about every 23 days.

Has the Lebanon water system had EPA violations?

EPA records show no health-based violations for Lebanon Water System since 2016.

Nearby cities

All 44 cities in Tennessee

Hardness data: TapWaterData US Water Hardness (utility report, December 14, 2024), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.