Hard water in Sartell, MN
Calculated from the utility's calcium and magnesium results · October 2022
- MN typical
- 160 mg/L
- EPA health violations since 2016
- 0
- Softener for 3 people
- 48k grain
- Data
- Calculated from utility data
Sartell water measures 352 mg/L (20.6 gpg) of hardness, very hard by USGS standards. TapWaterData worked it out from the calcium and magnesium levels the local utility reports (October 2022).
Sartell sits 192 mg/L above the typical Minnesota figure of 160. None of the 10 nearest cities we track has harder water. The range nearby runs from 120 mg/L in Brooklyn Park to 319 in Minnetrista.
What 352 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 352 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 × 20.6 gpg = 4,637 grains a day. A 48,000-grain unit regenerates about every 10 days.
EPA record for Sartell's water system
No health-based violations since 2016
Serves about 20,300 people from groundwater.
- Health-based
- 0
- Monitoring or reporting
- 2
- Open now
- 0
EPA lists this system as serving Sartell.
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 Sartell water hard?
Yes. It measures about 352 mg/L (20.6 grains per gallon), which the USGS classes as very hard.
What is the water hardness in Sartell in grains per gallon?
About 20.6 gpg. One grain per gallon equals 17.1 mg/L, so 352 mg/L divided by 17.1 gives 20.6.
What size water softener do I need in Sartell?
For 3 people using 75 gallons each per day, 20.6 gpg works out to about 4,637 grains a day. A 48,000-grain softener covers that with a regeneration about every 10 days.
Has the Sartell water system had EPA violations?
EPA records show no health-based violations for Sartell since 2016. There were also 2 monitoring or reporting violations, which are about late or missing tests and notices.
Nearby cities
- St. Cloud240 mg/LVery hard
- Elk River170 mg/LHard
- St. Michael260 mg/LVery hard
- Andover200 mg/LVery hard
- Champlin234 mg/LVery hard
- Brainerd215 mg/LVery hard
- Minnetrista319 mg/LVery hard
- Coon Rapids201 mg/LVery hard
- Willmar238 mg/LVery hard
- Brooklyn Park120 mg/LModerately hard
Hardness data: TapWaterData US Water Hardness (calculated from utility data, October 26, 2022), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.