Hard water in Muskego, WI
Reported by Muskego Water Utility · August 2022
- WI typical
- 170 mg/L
- EPA health violations since 2016
- 1
- Softener for 3 people
- 32k grain
- Data
- Utility report
The water in Muskego carries roughly 276 mg/L of dissolved calcium and magnesium, or 16.1 grains per gallon. That is very hard water. The number comes from Muskego Water Utility, dated August 2022. Reports for this system disagree, with values from 276 to 340 mg/L.
Muskego sits 106 mg/L above the typical Wisconsin figure of 170. Of the 10 nearest cities we track, 5 have softer water and 5 have harder. The range nearby runs from 135 mg/L in Greenfield to 424 in Brookfield.
What 276 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 276 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 × 16.1 gpg = 3,632 grains a day. A 32,000-grain unit regenerates about every 8 days.
EPA record for Muskego's water system
1 health-based violation since 2016
Serves about 8,150 people from groundwater.
- Health-based
- 1
- Monitoring or reporting
- 18
- Open now
- 1
| Contaminant or rule | Violations | Period | Status |
|---|---|---|---|
| Lead and Copper Rulecorrosion control and lead sampling | 1 | 2024 | Resolved |
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 Muskego water hard?
Yes. It measures about 276 mg/L (16.1 grains per gallon), which the USGS classes as very hard.
What is the water hardness in Muskego in grains per gallon?
About 16.1 gpg. One grain per gallon equals 17.1 mg/L, so 276 mg/L divided by 17.1 gives 16.1.
What size water softener do I need in Muskego?
For 3 people using 75 gallons each per day, 16.1 gpg works out to about 3,632 grains a day. A 32,000-grain softener covers that with a regeneration about every 8 days.
Has the Muskego water system had EPA violations?
EPA records show 1 health-based violation for Muskego Water Utility since 2016, involving Lead and Copper Rule. There were also 18 monitoring or reporting violations, which are about late or missing tests and notices.
Nearby cities
- Franklin210 mg/LVery hard
- New Berlin330 mg/LVery hard
- Greenfield135 mg/LHard
- West Allis135 mg/LHard
- Waukesha326 mg/LVery hard
- Oak Creek210 mg/LVery hard
- Brookfield424 mg/LVery hard
- Union Grove313 mg/LVery hard
- Caledonia300 mg/LVery hard
- South Milwaukee210 mg/LVery hard
Hardness data: TapWaterData US Water Hardness (utility report, August 15, 2022), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.