How hard is the water in Farmington Hills, MI?

Tap water hardness
119mg/L
7.0gpg
Moderately hard

Reported by Farmington Hills, City of · October 2025

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

Farmington Hills water measures 119 mg/L (7.0 gpg) of hardness, moderately hard by USGS standards. The number comes from Farmington Hills, City of, dated October 2025.

Farmington Hills on the hardness scale, with nearby cities
060120180240300360+MI typical 112Berkley: 85 mg/LBerkley 85Livonia: 89 mg/LLivonia 89Beverly Hills: 90 mg/LBeverly Hills 90Royal Oak: 96 mg/LRoyal Oak 96Plymouth: 104 mg/LPlymouth 104Dearborn Heights: 104 mg/LDearborn Heights 104Garden City: 104 mg/LGarden City 104Novi: 116 mg/LNovi 116Northville: 132 mg/LNorthville 132Oak Park: 277 mg/LOak Park 277Farmington Hills 119mg/L as calcium carbonate060120180240300360+MI 112Berkley: 85 mg/LBerkley 85Livonia: 89 mg/LLivonia 89Beverly Hills: 90 mg/LBeverly Hi. 90Plymouth: 104 mg/LPlymouth 104Novi: 116 mg/LNovi 116Northville: 132 mg/LNorthville 132119 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Farmington Hills sits close to the typical Michigan figure of 112 mg/L. Of the 10 nearest cities we track, 8 have softer water and 2 have harder. The range nearby runs from 85 mg/L in Berkley to 277 in Oak Park.

What 119 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 Farmington Hills

3 people × 75 gallons a day × 7.0 gpg = 1,570 grains a day. A 24,000-grain unit regenerates about every 15 days.

Size it for your household

EPA record for Farmington Hills's water system

Farmington Hills, City of · PWSID MI0002240

No health-based violations since 2016

Serves about 56,984 people from surface water.

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 Farmington Hills water hard?

Somewhat. It measures about 119 mg/L (7.0 grains per gallon), which the USGS classes as moderately hard.

What is the water hardness in Farmington Hills in grains per gallon?

About 7.0 gpg. One grain per gallon equals 17.1 mg/L, so 119 mg/L divided by 17.1 gives 7.0.

What size water softener do I need in Farmington Hills?

For 3 people using 75 gallons each per day, 7.0 gpg works out to about 1,570 grains a day. A 24,000-grain softener covers that with a regeneration about every 15 days.

Has the Farmington Hills water system had EPA violations?

EPA records show no health-based violations for Farmington Hills, City of since 2016.

Nearby cities

All 118 cities in Michigan

Hardness data: TapWaterData US Water Hardness (utility report, October 7, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.