How hard is the water in Nolensville, TN?

Tap water hardness
62mg/L
3.6gpg
Moderately hard

Reported by Nolensville-College Grove U.d. · July 2025

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

Nolensville water measures 62 mg/L (3.6 gpg) of hardness, moderately hard by USGS standards. The number comes from Nolensville-College Grove U.d., dated July 2025.

Nolensville on the hardness scale, with nearby cities
060120180240300360+TN typical 89Brentwood: 89 mg/LBrentwood 89Nashville: 89 mg/LNashville 89Mount Juliet: 89 mg/LMount Juliet 89Green Hill: 89 mg/LGreen Hill 89Hendersonville: 89 mg/LHendersonville 89Franklin: 98 mg/LFranklin 98Murfreesboro: 101 mg/LMurfreesboro 101Spring Hill: 138 mg/LSpring Hill 138La Vergne: 200 mg/LLa Vergne 200Smyrna: 200 mg/LSmyrna 200Nolensville 62mg/L as calcium carbonate060120180240300360+TN 89Brentwood: 89 mg/LBrentwood 89Nashville: 89 mg/LNashville 89Franklin: 98 mg/LFranklin 98Murfreesboro: 101 mg/LMurfreesbo. 101La Vergne: 200 mg/LLa Vergne 200Smyrna: 200 mg/LSmyrna 20062 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

At 62 mg/L, Nolensville is 27 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 89 mg/L in Brentwood to 200 in La Vergne.

What 62 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 Nolensville

3 people × 75 gallons a day × 3.6 gpg = 812 grains a day. A 24,000-grain unit regenerates about every 29 days.

Size it for your household

EPA record for Nolensville's water system

Nolensville-College Grove U.d. · PWSID TN0000511

No health-based violations since 2016

Serves about 34,159 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 Nolensville water hard?

Somewhat. It measures about 62 mg/L (3.6 grains per gallon), which the USGS classes as moderately hard.

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

About 3.6 gpg. One grain per gallon equals 17.1 mg/L, so 62 mg/L divided by 17.1 gives 3.6.

What size water softener do I need in Nolensville?

For 3 people using 75 gallons each per day, 3.6 gpg works out to about 812 grains a day. A 24,000-grain softener covers that with a regeneration about every 29 days.

Has the Nolensville water system had EPA violations?

EPA records show no health-based violations for Nolensville-College Grove U.d. since 2016.

Nearby cities

All 44 cities in Tennessee

Hardness data: TapWaterData US Water Hardness (utility report, July 1, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.