Hard water in Mount Pleasant, WI
Reported by Racine Waterworks · April 2025
- WI typical
- 170 mg/L
- EPA health violations since 2016
- 0
- Softener for 3 people
- 24k grain
- Data
- Utility report
The water in Mount Pleasant carries roughly 136 mg/L of dissolved calcium and magnesium, or 8.0 grains per gallon. That is hard water. The number comes from Racine Waterworks, dated April 2025.
Mount Pleasant sits 34 mg/L below the typical Wisconsin figure of 170. None of the 10 nearest cities we track has softer water. The range nearby runs from 136 mg/L in Sturtevant to 313 in Union Grove.
What 136 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 136 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 × 8.0 gpg = 1,789 grains a day. A 24,000-grain unit regenerates about every 13 days.
EPA record for Mount Pleasant's water system
No health-based violations since 2016
Serves about 105,100 people from surface water.
- Health-based
- 0
- Monitoring or reporting
- 0
- Open now
- 0
TapWaterData ties Mount Pleasant to this system. EPA's service-area records do not name Mount Pleasant, so check the utility printed on your water bill.
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 Mount Pleasant water hard?
Yes. It measures about 136 mg/L (8.0 grains per gallon), which the USGS classes as hard.
What is the water hardness in Mount Pleasant in grains per gallon?
About 8.0 gpg. One grain per gallon equals 17.1 mg/L, so 136 mg/L divided by 17.1 gives 8.0.
What size water softener do I need in Mount Pleasant?
For 3 people using 75 gallons each per day, 8.0 gpg works out to about 1,789 grains a day. A 24,000-grain softener covers that with a regeneration about every 13 days.
Has the Mount Pleasant water system had EPA violations?
EPA records show no health-based violations for Racine Waterworks since 2016.
Nearby cities
- Sturtevant136 mg/LHard
- Racine136 mg/LHard
- Caledonia300 mg/LVery hard
- Kenosha140 mg/LHard
- Union Grove313 mg/LVery hard
- Oak Creek210 mg/LVery hard
- Pleasant Prairie140 mg/LHard
- Franklin210 mg/LVery hard
- Bristol270 mg/LVery hard
- South Milwaukee210 mg/LVery hard
Hardness data: TapWaterData US Water Hardness (utility report, April 2, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.