Hard water in Tonganoxie, KS
Reported by Leavenworth CO RWD 9 · June 2022
- KS typical
- 138 mg/L
- EPA health violations since 2016
- 0
- Softener for 3 people
- 24k grain
- Data
- Utility report
The water in Tonganoxie carries roughly 215 mg/L of dissolved calcium and magnesium, or 12.6 grains per gallon. That is very hard water. The number comes from Leavenworth CO RWD 9, dated June 2022.
At 215 mg/L, Tonganoxie is 77 mg/L above the typical Kansas figure of 138. Of the 10 nearest cities we track, 8 have softer water and 2 have harder. The range nearby runs from 128 mg/L in Leavenworth to 416 in Bonner Springs.
What 215 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 215 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 × 12.6 gpg = 2,828 grains a day. A 24,000-grain unit regenerates about every 8 days.
EPA record for Tonganoxie's water system
No health-based violations since 2016
Serves about 2,000 people from surface water.
- Health-based
- 0
- Monitoring or reporting
- 1
- 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 Tonganoxie water hard?
Yes. It measures about 215 mg/L (12.6 grains per gallon), which the USGS classes as very hard.
What is the water hardness in Tonganoxie in grains per gallon?
About 12.6 gpg. One grain per gallon equals 17.1 mg/L, so 215 mg/L divided by 17.1 gives 12.6.
What size water softener do I need in Tonganoxie?
For 3 people using 75 gallons each per day, 12.6 gpg works out to about 2,828 grains a day. A 24,000-grain softener covers that with a regeneration about every 8 days.
Has the Tonganoxie water system had EPA violations?
EPA records show no health-based violations for Leavenworth CO RWD 9 since 2016. There were also 1 monitoring or reporting violation, which are about late or missing tests and notices.
Nearby cities
- Bonner Springs416 mg/LVery hard
- De Soto135 mg/LHard
- Lawrence142 mg/LHard
- Shawnee135 mg/LHard
- Leavenworth128 mg/LHard
- Lenexa135 mg/LHard
- Kansas City303 mg/LVery hard
- Olathe140 mg/LHard
- Merriam135 mg/LHard
- Gardner135 mg/LHard
Hardness data: TapWaterData US Water Hardness (utility report, June 8, 2022), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.