Hard water in Greenville, WI
Reported by Grand Chute TN San Dist 1 · October 2025
- WI typical
- 170 mg/L
- EPA health violations since 2016
- 0
- Softener for 3 people
- 24k grain
- Data
- Utility report
The water in Greenville carries roughly 152 mg/L of dissolved calcium and magnesium, or 8.9 grains per gallon. That is hard water. The number comes from Grand Chute TN San Dist 1, dated October 2025. Reports for this system disagree, with values from 152 to 290 mg/L.
At 152 mg/L, Greenville is 18 mg/L below the typical Wisconsin figure of 170. Of the 10 nearest cities we track, 6 have softer water and 4 have harder. The range nearby runs from 67 mg/L in Neenah to 279 in New London.
What 152 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 152 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 × 8.9 gpg = 2,000 grains a day. A 24,000-grain unit regenerates about every 11 days.
EPA record for Greenville's water system
No health-based violations since 2016
Serves about 11,340 people from groundwater.
- Health-based
- 0
- Monitoring or reporting
- 0
- Open now
- 0
EPA lists Greenville Utilities Vil of as the system serving Greenville. The hardness figure above comes from a different system's report, which TapWaterData uses for Greenville.
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 Greenville water hard?
Yes. It measures about 152 mg/L (8.9 grains per gallon), which the USGS classes as hard.
What is the water hardness in Greenville in grains per gallon?
About 8.9 gpg. One grain per gallon equals 17.1 mg/L, so 152 mg/L divided by 17.1 gives 8.9.
What size water softener do I need in Greenville?
For 3 people using 75 gallons each per day, 8.9 gpg works out to about 2,000 grains a day. A 24,000-grain softener covers that with a regeneration about every 11 days.
Has the Greenville water system had EPA violations?
EPA records show no health-based violations for Greenville Utilities Vil of since 2016.
Nearby cities
- Fox Crossing166 mg/LHard
- Menasha166 mg/LHard
- Appleton81 mg/LModerately hard
- Neenah67 mg/LModerately hard
- Kimberly73 mg/LModerately hard
- Little Chute87 mg/LModerately hard
- New London279 mg/LVery hard
- Oshkosh145 mg/LHard
- De Pere194 mg/LVery hard
- Allouez136 mg/LHard
Hardness data: TapWaterData US Water Hardness (utility report, October 13, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.