How hard is the water in Roseville, MN?

Tap water hardness
78mg/L
4.6gpg
Moderately hard

Reported by Roseville · December 2024

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

Roseville water measures 78 mg/L (4.6 gpg) of hardness, moderately hard by USGS standards. The number comes from Roseville, dated December 2024.

Roseville on the hardness scale, with nearby cities
060120180240300360+MN typical 160Maplewood: 56 mg/LMaplewood 56North St. Paul: 56 mg/LNorth St. Paul 56Brooklyn Center: 79 mg/LBrooklyn Center 79St. Paul: 82 mg/LSt. Paul 82Minneapolis: 89 mg/LMinneapolis 89Mahtomedi: 162 mg/LMahtomedi 162Shoreview: 192 mg/LShoreview 192Robbinsdale: 201 mg/LRobbinsdale 201New Brighton: 230 mg/LNew Brighton 230St. Anthony: 254 mg/LSt. Anthony 254Roseville 78mg/L as calcium carbonate060120180240300360+MN 160Maplewood: 56 mg/LMaplewood 56St. Paul: 82 mg/LSt. Paul 82Minneapolis: 89 mg/LMinneapolis 89Shoreview: 192 mg/LShoreview 192New Brighton: 230 mg/LNew Bright. 230St. Anthony: 254 mg/LSt. Anthony 25478 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Roseville sits 82 mg/L below the typical Minnesota figure of 160. Of the 10 nearest cities we track, 2 have softer water and 8 have harder. The range nearby runs from 56 mg/L in Maplewood to 254 in St. Anthony.

What 78 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 Roseville

3 people × 75 gallons a day × 4.6 gpg = 1,026 grains a day. A 24,000-grain unit regenerates about every 23 days.

Size it for your household

EPA record for Roseville's water system

Roseville · PWSID MN1620013

No health-based violations since 2016

Serves about 35,343 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 Roseville water hard?

Somewhat. It measures about 78 mg/L (4.6 grains per gallon), which the USGS classes as moderately hard.

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

About 4.6 gpg. One grain per gallon equals 17.1 mg/L, so 78 mg/L divided by 17.1 gives 4.6.

What size water softener do I need in Roseville?

For 3 people using 75 gallons each per day, 4.6 gpg works out to about 1,026 grains a day. A 24,000-grain softener covers that with a regeneration about every 23 days.

Has the Roseville water system had EPA violations?

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

Nearby cities

All 57 cities in Minnesota

Hardness data: TapWaterData US Water Hardness (utility report, December 9, 2024), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.