Hard water in Waukee, IA
County estimate from 112 water samples in Dallas County · July 2026
- IA typical
- 183 mg/L
- EPA health violations since 2016
- 0
- Softener for 3 people
- 32k grain
- Data
- County estimate
Water samples from around Waukee put hardness at about 302 mg/L (17.7 gpg), which would be very hard on the USGS scale. Treat this as a rough guide: it is the median of 112 samples taken across Dallas County, mostly wells and streams, not a test of Waukee's treated tap water. One more reason for caution: EPA lists Waukee's water system as using surface water, which is often softer than the wells behind the county figure.
Waukee sits 119 mg/L above the typical Iowa figure of 183. None of the 10 nearest cities we track has harder water. The range nearby runs from 68 mg/L in Clive to 296 in Des Moines.
What 302 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 302 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 × 17.7 gpg = 3,974 grains a day. A 32,000-grain unit regenerates about every 8 days.
EPA record for Waukee's water system
No health-based violations since 2016
Serves about 31,823 people from surface water.
- Health-based
- 0
- Monitoring or reporting
- 0
- Open now
- 0
EPA lists this system as serving Waukee.
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 Waukee water hard?
Yes. It measures about 302 mg/L (17.7 grains per gallon), which the USGS classes as very hard.
What is the water hardness in Waukee in grains per gallon?
About 17.7 gpg. One grain per gallon equals 17.1 mg/L, so 302 mg/L divided by 17.1 gives 17.7.
What size water softener do I need in Waukee?
For 3 people using 75 gallons each per day, 17.7 gpg works out to about 3,974 grains a day. A 32,000-grain softener covers that with a regeneration about every 8 days.
Has the Waukee water system had EPA violations?
EPA records show no health-based violations for Waukee Water Supply since 2016.
Nearby cities
- Clive68 mg/LModerately hard
- West Des Moines135 mg/LHard
- Urbandale99 mg/LModerately hard
- Johnston126 mg/LHard
- Norwalk132 mg/LHard
- Des Moines296 mg/LVery hard
- Polk City151 mg/LHard
- Ankeny120 mg/LModerately hard
- Altoona296 mg/LVery hard
- Ames150 mg/LHard
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.