How hard is the water in Roseville, MI?

Tap water hardness
101mg/L
5.9gpg
Moderately hard

Reported by Clinton Township · March 2025

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

The water in Roseville carries roughly 101 mg/L of dissolved calcium and magnesium, or 5.9 grains per gallon. That is moderately hard water. The number comes from Clinton Township, dated March 2025.

Roseville on the hardness scale, with nearby cities
060120180240300360+MI typical 112Warren: 95 mg/LWarren 95Harper Woods: 95 mg/LHarper Woods 95Grosse Pointe: 95 mg/LGrosse Pointe 95Fraser: 101 mg/LFraser 101St. Clair Shores: 101 mg/LSt. Clair Shores 101Mount Clemens: 103 mg/LMount Clemens 103Sterling Heights: 103 mg/LSterling Heights 103Grosse Pointe Farms: 110 mg/LGrosse Pointe Farms 110Eastpointe: 266 mg/LEastpointe 266Madison Heights: 277 mg/LMadison Heights 277Roseville 101mg/L as calcium carbonate060120180240300360+MI 112Warren: 95 mg/LWarren 95Harper Woods: 95 mg/LHarper Woo. 95Fraser: 101 mg/LFraser 101St. Clair Shores: 101 mg/LSt. Clair. 101Mount Clemens: 103 mg/LMount Clem. 103Eastpointe: 266 mg/LEastpointe 266101 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Roseville sits 11 mg/L below the typical Michigan figure of 112. Of the 10 nearest cities we track, 3 have softer water and 5 have harder. The range nearby runs from 95 mg/L in Warren to 277 in Madison Heights.

What 101 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 Roseville

3 people × 75 gallons a day × 5.9 gpg = 1,330 grains a day. A 24,000-grain unit regenerates about every 18 days.

Size it for your household

EPA record for Roseville's water system

Roseville, City of · PWSID MI0005820

No health-based violations since 2016

Serves about 47,299 people from surface water.

Health-based
0
Monitoring or reporting
2
Open now
0

EPA lists Roseville, City of as the system serving Roseville. The hardness figure above comes from a different system's report, which TapWaterData uses for Roseville.

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 Roseville water hard?

Somewhat. It measures about 101 mg/L (5.9 grains per gallon), which the USGS classes as moderately hard.

What is the water hardness in Roseville in grains per gallon?

About 5.9 gpg. One grain per gallon equals 17.1 mg/L, so 101 mg/L divided by 17.1 gives 5.9.

What size water softener do I need in Roseville?

For 3 people using 75 gallons each per day, 5.9 gpg works out to about 1,330 grains a day. A 24,000-grain softener covers that with a regeneration about every 18 days.

Has the Roseville water system had EPA violations?

EPA records show no health-based violations for Roseville, City of since 2016. There were also 2 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, March 24, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.