How hard is the water in Mount Clemens, MI?

Tap water hardness
103mg/L
6.0gpg
Moderately hard

Reported by Clinton Township · March 2025

MI typical
112 mg/L
EPA health violations since 2016
2
Softener for 3 people
24k grain
Data
Utility report

Tap water in Mount Clemens has about 103 mg/L of hardness, which is 6.0 grains per gallon. On the USGS scale that counts as moderately hard. The number comes from Clinton Township, dated March 2025.

Mount Clemens on the hardness scale, with nearby cities
060120180240300360+MI typical 112Warren: 95 mg/LWarren 95Harper Woods: 95 mg/LHarper Woods 95Fraser: 101 mg/LFraser 101Roseville: 101 mg/LRoseville 101St. Clair Shores: 101 mg/LSt. Clair Shores 101Utica: 103 mg/LUtica 103Sterling Heights: 103 mg/LSterling Heights 103New Baltimore: 136 mg/LNew Baltimore 136New Haven: 165 mg/LNew Haven 165Eastpointe: 266 mg/LEastpointe 266Mount Clemens 103mg/L as calcium carbonate060120180240300360+MI 112Fraser: 101 mg/LFraser 101Roseville: 101 mg/LRoseville 101St. Clair Shores: 101 mg/LSt. Clair. 101Utica: 103 mg/LUtica 103Sterling Heights: 103 mg/LSterling H. 103New Baltimore: 136 mg/LNew Baltim. 136103 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Mount Clemens sits close to the typical Michigan figure of 112 mg/L. Of the 10 nearest cities we track, 5 have softer water and 3 have harder. The range nearby runs from 95 mg/L in Warren to 266 in Eastpointe.

What 103 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 Mount Clemens

3 people × 75 gallons a day × 6.0 gpg = 1,352 grains a day. A 24,000-grain unit regenerates about every 17 days.

Size it for your household

EPA record for Mount Clemens's water system

Mount Clemens, City of · PWSID MI0004510

2 health-based violations since 2016

Serves about 16,314 people from surface water.

Health-based
2
Monitoring or reporting
27
Open now
0

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

20162017201820192020202120222023202420252026Total organic carbon removalTotal trihalomethanes (TTHM)'16'18'20'22'24'26Total organic carbon removalTotal trihalomethanes (TTHM)
Each dot is one health-based violation, placed at the start of its compliance period.
Contaminant or ruleViolationsPeriodStatus
Total organic carbon removaltreatment requirement12024Resolved
Total trihalomethanes (TTHM)a disinfection byproduct12022Resolved

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 Clemens water hard?

Somewhat. It measures about 103 mg/L (6.0 grains per gallon), which the USGS classes as moderately hard.

What is the water hardness in Mount Clemens in grains per gallon?

About 6.0 gpg. One grain per gallon equals 17.1 mg/L, so 103 mg/L divided by 17.1 gives 6.0.

What size water softener do I need in Mount Clemens?

For 3 people using 75 gallons each per day, 6.0 gpg works out to about 1,352 grains a day. A 24,000-grain softener covers that with a regeneration about every 17 days.

Has the Mount Clemens water system had EPA violations?

EPA records show 2 health-based violations for Mount Clemens, City of since 2016, involving Total organic carbon removal, Total trihalomethanes (TTHM). There were also 27 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.