Hard water in Robbinsdale, MN

Tap water hardness
201mg/L
11.8gpg
Very hard

Reported by Robbinsdale · September 2024

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

The water in Robbinsdale carries roughly 201 mg/L of dissolved calcium and magnesium, or 11.8 grains per gallon. That is very hard water. The number comes from Robbinsdale, dated September 2024.

Robbinsdale on the hardness scale, with nearby cities
060120180240300360+MN typical 160Roseville: 78 mg/LRoseville 78Brooklyn Center: 79 mg/LBrooklyn Center 79Minneapolis: 89 mg/LMinneapolis 89Golden Valley: 90 mg/LGolden Valley 90St. Louis Park: 112 mg/LSt. Louis Park 112Brooklyn Park: 120 mg/LBrooklyn Park 120Hopkins: 163 mg/LHopkins 163Minnetonka: 186 mg/LMinnetonka 186New Brighton: 230 mg/LNew Brighton 230St. Anthony: 254 mg/LSt. Anthony 254Robbinsdale 201mg/L as calcium carbonate060120180240300360+MN 160Brooklyn Center: 79 mg/LBrooklyn C. 79Minneapolis: 89 mg/LMinneapolis 89Golden Valley: 90 mg/LGolden Val. 90St. Louis Park: 112 mg/LSt. Louis. 112Brooklyn Park: 120 mg/LBrooklyn P. 120St. Anthony: 254 mg/LSt. Anthony 254201 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Robbinsdale sits 41 mg/L above the typical Minnesota figure of 160. Of the 10 nearest cities we track, 8 have softer water and 2 have harder. The range nearby runs from 78 mg/L in Roseville to 254 in St. Anthony.

What 201 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 201 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.

Softener size for Robbinsdale

3 people × 75 gallons a day × 11.8 gpg = 2,644 grains a day. A 24,000-grain unit regenerates about every 9 days.

Size it for your household

EPA record for Robbinsdale's water system

Robbinsdale · PWSID MN1270046

No health-based violations since 2016

Serves about 14,646 people from groundwater.

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 Robbinsdale water hard?

Yes. It measures about 201 mg/L (11.8 grains per gallon), which the USGS classes as very hard.

What is the water hardness in Robbinsdale in grains per gallon?

About 11.8 gpg. One grain per gallon equals 17.1 mg/L, so 201 mg/L divided by 17.1 gives 11.8.

What size water softener do I need in Robbinsdale?

For 3 people using 75 gallons each per day, 11.8 gpg works out to about 2,644 grains a day. A 24,000-grain softener covers that with a regeneration about every 9 days.

Has the Robbinsdale water system had EPA violations?

EPA records show no health-based violations for Robbinsdale since 2016.

Nearby cities

All 57 cities in Minnesota

Hardness data: TapWaterData US Water Hardness (utility report, September 23, 2024), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.