Hard water in Mulvane, KS
Reported by Mulvane, City of · April 2022
- KS typical
- 138 mg/L
- EPA health violations since 2016
- 0
- Softener for 3 people
- 24k grain
- Data
- Utility report
Mulvane water measures 128 mg/L (7.5 gpg) of hardness, hard by USGS standards. The number comes from Mulvane, City of, dated April 2022.
At 128 mg/L, Mulvane is close to the typical Kansas figure of 138 mg/L. Of the 10 nearest cities we track, 2 have softer water and 8 have harder. The range nearby runs from 117 mg/L in El Dorado to 268 in Goddard.
What 128 mg/L means at home
Expect white crust on faucets and showerheads, plus spots on dishes that come out of the dishwasher.
Kettles collect scale quickly. Water heaters build up sediment at the bottom of the tank, which makes them work harder over time.
Soap and detergent need a little more to lather, and soap scum shows up in the tub.
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 128 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 × 7.5 gpg = 1,681 grains a day. A 24,000-grain unit regenerates about every 14 days.
EPA record for Mulvane's water system
No health-based violations since 2016
Serves about 6,587 people from surface water.
- Health-based
- 0
- Monitoring or reporting
- 0
- 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 Mulvane water hard?
Yes. It measures about 128 mg/L (7.5 grains per gallon), which the USGS classes as hard.
What is the water hardness in Mulvane in grains per gallon?
About 7.5 gpg. One grain per gallon equals 17.1 mg/L, so 128 mg/L divided by 17.1 gives 7.5.
What size water softener do I need in Mulvane?
For 3 people using 75 gallons each per day, 7.5 gpg works out to about 1,681 grains a day. A 24,000-grain softener covers that with a regeneration about every 14 days.
Has the Mulvane water system had EPA violations?
EPA records show no health-based violations for Mulvane, City of since 2016.
Nearby cities
- Derby133 mg/LHard
- Haysville225 mg/LVery hard
- Wichita138 mg/LHard
- Augusta120 mg/LModerately hard
- Winfield136 mg/LHard
- Goddard268 mg/LVery hard
- Park City138 mg/LHard
- Valley Center133 mg/LHard
- Arkansas City206 mg/LVery hard
- El Dorado117 mg/LModerately hard
Hardness data: TapWaterData US Water Hardness (utility report, April 7, 2022), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.