Hard water in Carl Junction, MO
Calculated from the utility's calcium and magnesium results · December 2020
- MO typical
- 121 mg/L
- EPA health violations since 2016
- 0
- Softener for 3 people
- 24k grain
- Data
- Calculated from utility data
Tap water in Carl Junction has about 213 mg/L of hardness, which is 12.5 grains per gallon. On the USGS scale that counts as very hard. TapWaterData worked it out from the calcium and magnesium levels the local utility reports (December 2020).
At 213 mg/L, Carl Junction is 92 mg/L above the typical Missouri figure of 121. None of the 10 nearest cities we track has harder water. The range nearby runs from 144 mg/L in Joplin to 208 in Aurora.
What 213 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 213 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 × 12.5 gpg = 2,806 grains a day. A 24,000-grain unit regenerates about every 8 days.
EPA record for Carl Junction's water system
No health-based violations since 2016
Serves about 8,142 people from groundwater.
- Health-based
- 0
- Monitoring or reporting
- 3
- Open now
- 0
EPA lists this system as serving Carl Junction.
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 Carl Junction water hard?
Yes. It measures about 213 mg/L (12.5 grains per gallon), which the USGS classes as very hard.
What is the water hardness in Carl Junction in grains per gallon?
About 12.5 gpg. One grain per gallon equals 17.1 mg/L, so 213 mg/L divided by 17.1 gives 12.5.
What size water softener do I need in Carl Junction?
For 3 people using 75 gallons each per day, 12.5 gpg works out to about 2,806 grains a day. A 24,000-grain softener covers that with a regeneration about every 8 days.
Has the Carl Junction water system had EPA violations?
EPA records show no health-based violations for Carl Junction PWS since 2016. There were also 3 monitoring or reporting violations, which are about late or missing tests and notices.
Nearby cities
- Webb City159 mg/LHard
- Joplin144 mg/LHard
- Carthage165 mg/LHard
- Neosho168 mg/LHard
- Monett180 mg/LVery hard
- Aurora208 mg/LVery hard
- Nevada157 mg/LHard
- Republic155 mg/LHard
- Willard153 mg/LHard
- Battlefield190 mg/LVery hard
Hardness data: TapWaterData US Water Hardness (calculated from utility data, December 14, 2020), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.