Hard water in Davison, MI
Reported by Davison, City of · June 2022
- MI typical
- 112 mg/L
- EPA health violations since 2016
- 0
- Softener for 3 people
- 24k grain
- Data
- Utility report
The water in Davison carries roughly 181 mg/L of dissolved calcium and magnesium, or 10.6 grains per gallon. That is very hard water. The number comes from Davison, City of, dated June 2022.
Davison sits 69 mg/L above the typical Michigan figure of 112. Of the 10 nearest cities we track, 7 have softer water and 3 have harder. The range nearby runs from 90 mg/L in Auburn Hills to 354 in Lapeer.
What 181 mg/L means at home
Scale forms fast here. Kettles and coffee makers need regular descaling, and showerheads clog unless you clean them.
Tank water heaters collect mineral sediment that insulates the water from the burner, so flushing the tank matters more than usual.
Dishes and glass shower doors spot easily. Soap scum and a dull film on hair or laundry are common complaints.
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 181 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 × 10.6 gpg = 2,383 grains a day. A 24,000-grain unit regenerates about every 10 days.
EPA record for Davison's water system
No health-based violations since 2016
Serves about 5,000 people from groundwater.
- Health-based
- 0
- Monitoring or reporting
- 1
- 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 Davison water hard?
Yes. It measures about 181 mg/L (10.6 grains per gallon), which the USGS classes as very hard.
What is the water hardness in Davison in grains per gallon?
About 10.6 gpg. One grain per gallon equals 17.1 mg/L, so 181 mg/L divided by 17.1 gives 10.6.
What size water softener do I need in Davison?
For 3 people using 75 gallons each per day, 10.6 gpg works out to about 2,383 grains a day. A 24,000-grain softener covers that with a regeneration about every 10 days.
Has the Davison water system had EPA violations?
EPA records show no health-based violations for Davison, City of since 2016. There were also 1 monitoring or reporting violation, which are about late or missing tests and notices.
Nearby cities
- Burton150 mg/LHard
- Grand Blanc157 mg/LHard
- Flint137 mg/LHard
- Lapeer354 mg/LVery hard
- Beecher144 mg/LHard
- Swartz Creek98 mg/LModerately hard
- Flushing113 mg/LModerately hard
- Holly323 mg/LVery hard
- Fenton315 mg/LVery hard
- Auburn Hills90 mg/LModerately hard
Hardness data: TapWaterData US Water Hardness (utility report, June 30, 2022), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.