How hard is the water in Grosse Pointe Farms, MI?

Tap water hardness
110mg/L
6.4gpg
Moderately hard

Reported by Grosse Pointe Farms · April 2025

MI typical
112 mg/L
EPA health violations since 2016
0
Softener for 3 people
24k grain
Data
Utility report

The water in Grosse Pointe Farms carries roughly 110 mg/L of dissolved calcium and magnesium, or 6.4 grains per gallon. That is moderately hard water. The number comes from Grosse Pointe Farms, dated April 2025.

Grosse Pointe Farms on the hardness scale, with nearby cities
060120180240300360+MI typical 112Hamtramck: 87 mg/LHamtramck 87Grosse Pointe: 95 mg/LGrosse Pointe 95Grosse Pointe Park: 95 mg/LGrosse Pointe Park 95Harper Woods: 95 mg/LHarper Woods 95Warren: 95 mg/LWarren 95Detroit: 96 mg/LDetroit 96St. Clair Shores: 101 mg/LSt. Clair Shores 101Roseville: 101 mg/LRoseville 101Fraser: 101 mg/LFraser 101Eastpointe: 266 mg/LEastpointe 266Grosse Pointe Farms 110mg/L as calcium carbonate060120180240300360+MI 112Grosse Pointe: 95 mg/LGrosse Poi. 95Grosse Pointe Park: 95 mg/LGrosse Poi. 95Harper Woods: 95 mg/LHarper Woo. 95St. Clair Shores: 101 mg/LSt. Clair. 101Roseville: 101 mg/LRoseville 101Eastpointe: 266 mg/LEastpointe 266110 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Grosse Pointe Farms sits close to the typical Michigan figure of 112 mg/L. Of the 10 nearest cities we track, 9 have softer water and 1 has harder. The range nearby runs from 87 mg/L in Hamtramck to 266 in Eastpointe.

What 110 mg/L means at home

You may see faint white spots on glasses and shower doors after the water dries.

Scale builds up slowly. A kettle or coffee maker needs descaling now and then, maybe every few months.

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

Optional. Plenty of households at this level live with it and descale the kettle now and then.

Water softener

Worth a look if spots on glass bother you, or if your tankless water heater manual asks for softer water.

Carbon filter

Improves taste and removes chlorine. It leaves calcium and magnesium in place.

Softener size for Grosse Pointe Farms

3 people × 75 gallons a day × 6.4 gpg = 1,447 grains a day. A 24,000-grain unit regenerates about every 16 days.

Size it for your household

EPA record for Grosse Pointe Farms's water system

Grosse Pointe Farms · PWSID MI0002890

No health-based violations since 2016

Serves about 9,757 people from surface water.

Health-based
0
Monitoring or reporting
4
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 Grosse Pointe Farms water hard?

Somewhat. It measures about 110 mg/L (6.4 grains per gallon), which the USGS classes as moderately hard.

What is the water hardness in Grosse Pointe Farms in grains per gallon?

About 6.4 gpg. One grain per gallon equals 17.1 mg/L, so 110 mg/L divided by 17.1 gives 6.4.

What size water softener do I need in Grosse Pointe Farms?

For 3 people using 75 gallons each per day, 6.4 gpg works out to about 1,447 grains a day. A 24,000-grain softener covers that with a regeneration about every 16 days.

Has the Grosse Pointe Farms water system had EPA violations?

EPA records show no health-based violations for Grosse Pointe Farms since 2016. There were also 4 monitoring or reporting violations, which are about late or missing tests and notices.

Nearby cities

All 118 cities in Michigan

Hardness data: TapWaterData US Water Hardness (utility report, April 15, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.