Hard water in Berlin, WI
Reported by Berlin Waterworks · August 2022
- WI typical
- 170 mg/L
- EPA health violations since 2016
- 0
- Softener for 3 people
- 24k grain
- Data
- Utility report
The water in Berlin carries roughly 204 mg/L of dissolved calcium and magnesium, or 11.9 grains per gallon. That is very hard water. The number comes from Berlin Waterworks, dated August 2022. Reports for this system disagree, with values from 204 to 242 mg/L.
Berlin sits 34 mg/L above the typical Wisconsin figure of 170. Of the 10 nearest cities we track, 8 have softer water and 2 have harder. The range nearby runs from 67 mg/L in Neenah to 385 in Ripon.
What 204 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 204 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 × 11.9 gpg = 2,684 grains a day. A 24,000-grain unit regenerates about every 8 days.
EPA record for Berlin's water system
No health-based violations since 2016
Serves about 5,524 people from groundwater.
- 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 Berlin water hard?
Yes. It measures about 204 mg/L (11.9 grains per gallon), which the USGS classes as very hard.
What is the water hardness in Berlin in grains per gallon?
About 11.9 gpg. One grain per gallon equals 17.1 mg/L, so 204 mg/L divided by 17.1 gives 11.9.
What size water softener do I need in Berlin?
For 3 people using 75 gallons each per day, 11.9 gpg works out to about 2,684 grains a day. A 24,000-grain softener covers that with a regeneration about every 8 days.
Has the Berlin water system had EPA violations?
EPA records show no health-based violations for Berlin Waterworks since 2016.
Nearby cities
- Ripon385 mg/LVery hard
- Oshkosh145 mg/LHard
- Neenah67 mg/LModerately hard
- Fond du Lac170 mg/LHard
- Fox Crossing166 mg/LHard
- Greenville152 mg/LHard
- Menasha166 mg/LHard
- New London279 mg/LVery hard
- Appleton81 mg/LModerately hard
- Kimberly73 mg/LModerately hard
Hardness data: TapWaterData US Water Hardness (utility report, August 8, 2022), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.