How hard is the water in Harrison, TN?

Tap water hardness
71mg/L
4.1gpg
Moderately hard

Reported by Eastside Utility District · September 2025

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

The water in Harrison carries roughly 71 mg/L of dissolved calcium and magnesium, or 4.1 grains per gallon. That is moderately hard water. The number comes from Eastside Utility District, dated September 2025.

Harrison on the hardness scale, with nearby cities
060120180240300360+TN typical 89Maryville: 42 mg/LMaryville 42Cookeville: 56 mg/LCookeville 56Signal Mountain: 69 mg/LSignal Mountain 69Chattanooga: 70 mg/LChattanooga 70Red Bank: 70 mg/LRed Bank 70East Ridge: 70 mg/LEast Ridge 70Tullahoma: 81 mg/LTullahoma 81Shelbyville: 130 mg/LShelbyville 130Oak Ridge: 132 mg/LOak Ridge 132Cleveland: 150 mg/LCleveland 150Harrison 71mg/L as calcium carbonate060120180240300360+TN 89Signal Mountain: 69 mg/LSignal Mou. 69Chattanooga: 70 mg/LChattanooga 70Red Bank: 70 mg/LRed Bank 70East Ridge: 70 mg/LEast Ridge 70Tullahoma: 81 mg/LTullahoma 81Cleveland: 150 mg/LCleveland 15071 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Harrison sits 18 mg/L below the typical Tennessee figure of 89. Of the 10 nearest cities we track, 6 have softer water and 4 have harder. The range nearby runs from 42 mg/L in Maryville to 150 in Cleveland.

What 71 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 Harrison

3 people × 75 gallons a day × 4.1 gpg = 929 grains a day. A 24,000-grain unit regenerates about every 25 days.

Size it for your household

EPA record for Harrison's water system

Eastside Utility District · PWSID TN0000219

No health-based violations since 2016

Serves about 59,612 people from surface water.

Health-based
0
Monitoring or reporting
3
Open now
2

TapWaterData ties Harrison to this system. EPA's service-area records do not name Harrison, 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 Harrison water hard?

Somewhat. It measures about 71 mg/L (4.1 grains per gallon), which the USGS classes as moderately hard.

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

About 4.1 gpg. One grain per gallon equals 17.1 mg/L, so 71 mg/L divided by 17.1 gives 4.1.

What size water softener do I need in Harrison?

For 3 people using 75 gallons each per day, 4.1 gpg works out to about 929 grains a day. A 24,000-grain softener covers that with a regeneration about every 25 days.

Has the Harrison water system had EPA violations?

EPA records show no health-based violations for Eastside Utility District since 2016. There were also 3 monitoring or reporting violations, which are about late or missing tests and notices.

Nearby cities

All 44 cities in Tennessee

Hardness data: TapWaterData US Water Hardness (utility report, September 16, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.