Hard water in Morristown, TN
County estimate from 57 water samples in Hamblen County · July 2026
- TN typical
- 89 mg/L
- EPA health violations since 2016
- 0
- Softener for 3 people
- 24k grain
- Data
- County estimate
Water samples from around Morristown put hardness at about 260 mg/L (15.2 gpg), which would be very hard on the USGS scale. Treat this as a rough guide: it is the median of 57 samples taken across Hamblen County, mostly wells and streams, not a test of Morristown's treated tap water. One more reason for caution: EPA lists Morristown's water system as using surface water, which is often softer than the wells behind the county figure.
Morristown sits 171 mg/L above the typical Tennessee figure of 89. None of the 10 nearest cities we track has harder water. The range nearby runs from 37 mg/L in Alcoa to 132 in Oak Ridge.
What 260 mg/L means at home
Scale forms fast here. Kettles and coffee makers need regular descaling, and showerheads clog unless you clean them.
Tank water heaters collect mineral sediment that insulates the water from the burner, so flushing the tank matters more than usual.
Dishes and glass shower doors spot easily. Soap scum and a dull film on hair or laundry are common complaints.
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
At 260 mg/L most of the trouble is scale, and only a few things deal with it.
Ion-exchange water softener
The standard whole-house fix. It swaps calcium and magnesium for sodium or potassium and needs salt plus a drain. Size it with the calculator below.
Salt-free conditioner
No salt and no drain line. It changes how minerals form scale instead of removing them, so water still tests hard.
Reverse osmosis or carbon filter
Under-sink reverse osmosis removes minerals from drinking water only. Plain carbon filters improve taste but do not soften.
3 people × 75 gallons a day × 15.2 gpg = 3,420 grains a day. A 24,000-grain unit regenerates about every 7 days.
EPA record for Morristown's water system
No health-based violations since 2016
Serves about 39,883 people from surface water.
- Health-based
- 0
- Monitoring or reporting
- 0
- Open now
- 0
EPA lists this system as serving Morristown.
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 Morristown water hard?
Yes. It measures about 260 mg/L (15.2 grains per gallon), which the USGS classes as very hard.
What is the water hardness in Morristown in grains per gallon?
About 15.2 gpg. One grain per gallon equals 17.1 mg/L, so 260 mg/L divided by 17.1 gives 15.2.
What size water softener do I need in Morristown?
For 3 people using 75 gallons each per day, 15.2 gpg works out to about 3,420 grains a day. A 24,000-grain softener covers that with a regeneration about every 7 days.
Has the Morristown water system had EPA violations?
EPA records show no health-based violations for Morristown Utilities Commission since 2016.
Nearby cities
- Knoxville91 mg/LModerately hard
- Powell99 mg/LModerately hard
- Eagleton Village46 mg/LSoft
- Alcoa37 mg/LSoft
- Kingsport106 mg/LModerately hard
- Maryville42 mg/LSoft
- Bloomingdale106 mg/LModerately hard
- Johnson City60 mg/LSoft
- Oak Ridge132 mg/LHard
- Bristol88 mg/LModerately hard
Hardness data: TapWaterData US Water Hardness (county estimate, July 4, 2026), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.