How hard is the water in Red Bank, TN?

Tap water hardness
70mg/L
4.1gpg
Moderately hard

Reported by Tennessee American Water · September 2025

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

Red Bank water measures 70 mg/L (4.1 gpg) of hardness, moderately hard by USGS standards. The number comes from Tennessee American Water, dated September 2025.

Red Bank on the hardness scale, with nearby cities
060120180240300360+TN typical 89Cookeville: 56 mg/LCookeville 56Signal Mountain: 69 mg/LSignal Mountain 69Chattanooga: 70 mg/LChattanooga 70East Ridge: 70 mg/LEast Ridge 70Harrison: 71 mg/LHarrison 71Tullahoma: 81 mg/LTullahoma 81Murfreesboro: 101 mg/LMurfreesboro 101Shelbyville: 130 mg/LShelbyville 130Oak Ridge: 132 mg/LOak Ridge 132Cleveland: 150 mg/LCleveland 150Red Bank 70mg/L as calcium carbonate060120180240300360+TN 89Signal Mountain: 69 mg/LSignal Mou. 69Chattanooga: 70 mg/LChattanooga 70East Ridge: 70 mg/LEast Ridge 70Harrison: 71 mg/LHarrison 71Tullahoma: 81 mg/LTullahoma 81Cleveland: 150 mg/LCleveland 15070 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Red Bank sits 19 mg/L below the typical Tennessee figure of 89. Of the 10 nearest cities we track, 2 have softer water and 6 have harder. The range nearby runs from 56 mg/L in Cookeville to 150 in Cleveland.

What 70 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 Red Bank

3 people × 75 gallons a day × 4.1 gpg = 925 grains a day. A 24,000-grain unit regenerates about every 25 days.

Size it for your household

EPA record for Red Bank's water system

Tennessee American Water · PWSID TN0000107

No health-based violations since 2016

Serves about 207,046 people from surface water.

Health-based
0
Monitoring or reporting
0
Open now
0

TapWaterData ties Red Bank to this system. EPA's service-area records do not name Red Bank, so check the utility printed on your water bill.

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 Red Bank water hard?

Somewhat. It measures about 70 mg/L (4.1 grains per gallon), which the USGS classes as moderately hard.

What is the water hardness in Red Bank in grains per gallon?

About 4.1 gpg. One grain per gallon equals 17.1 mg/L, so 70 mg/L divided by 17.1 gives 4.1.

What size water softener do I need in Red Bank?

For 3 people using 75 gallons each per day, 4.1 gpg works out to about 925 grains a day. A 24,000-grain softener covers that with a regeneration about every 25 days.

Has the Red Bank water system had EPA violations?

EPA records show no health-based violations for Tennessee American Water since 2016.

Nearby cities

All 44 cities in Tennessee

Hardness data: TapWaterData US Water Hardness (utility report, September 17, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.