Hard water in New Haven, MI
Reported by Chesterfield Township · October 2023
- MI typical
- 112 mg/L
- EPA health violations since 2016
- 1
- Softener for 3 people
- 24k grain
- Data
- Utility report
Tap water in New Haven has about 165 mg/L of hardness, which is 9.7 grains per gallon. On the USGS scale that counts as hard. The number comes from Chesterfield Township, dated October 2023. Reports for this system disagree, with values from 165 to 300 mg/L.
At 165 mg/L, New Haven is 53 mg/L above the typical Michigan figure of 112. Of the 10 nearest cities we track, 9 have softer water and 1 has harder. The range nearby runs from 100 mg/L in Rochester Hills to 266 in Eastpointe.
What 165 mg/L means at home
Expect white crust on faucets and showerheads, plus spots on dishes that come out of the dishwasher.
Kettles collect scale quickly. Water heaters build up sediment at the bottom of the tank, which makes them work harder over time.
Soap and detergent need a little more to lather, and soap scum shows up in the tub.
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 165 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 × 9.7 gpg = 2,176 grains a day. A 24,000-grain unit regenerates about every 11 days.
EPA record for New Haven's water system
1 health-based violation since 2016
Serves about 5,600 people from surface water.
- Health-based
- 1
- Monitoring or reporting
- 2
- Open now
- 0
EPA lists New Haven, Village of as the system serving New Haven. The hardness figure above comes from a different system's report, which TapWaterData uses for New Haven.
| Contaminant or rule | Violations | Period | Status |
|---|---|---|---|
| Lead and Copper Rulecorrosion control and lead sampling | 1 | 2024 | Resolved |
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 New Haven water hard?
Yes. It measures about 165 mg/L (9.7 grains per gallon), which the USGS classes as hard.
What is the water hardness in New Haven in grains per gallon?
About 9.7 gpg. One grain per gallon equals 17.1 mg/L, so 165 mg/L divided by 17.1 gives 9.7.
What size water softener do I need in New Haven?
For 3 people using 75 gallons each per day, 9.7 gpg works out to about 2,176 grains a day. A 24,000-grain softener covers that with a regeneration about every 11 days.
Has the New Haven water system had EPA violations?
EPA records show 1 health-based violation for New Haven, Village of since 2016, involving Lead and Copper Rule. There were also 2 monitoring or reporting violations, which are about late or missing tests and notices.
Nearby cities
- New Baltimore136 mg/LHard
- Mount Clemens103 mg/LModerately hard
- Utica103 mg/LModerately hard
- Fraser101 mg/LModerately hard
- Sterling Heights103 mg/LModerately hard
- Rochester104 mg/LModerately hard
- Roseville101 mg/LModerately hard
- St. Clair Shores101 mg/LModerately hard
- Rochester Hills100 mg/LModerately hard
- Eastpointe266 mg/LVery hard
Hardness data: TapWaterData US Water Hardness (utility report, October 25, 2023), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.