How hard is the water in Brooklyn Park, MN?

Tap water hardness
120mg/L
7.0gpg
Moderately hard

Reported by Brooklyn Park · September 2025

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

Brooklyn Park water measures 120 mg/L (7.0 gpg) of hardness, moderately hard by USGS standards. The number comes from Brooklyn Park, dated September 2025.

Brooklyn Park on the hardness scale, with nearby cities
060120180240300360+MN typical 160Brooklyn Center: 79 mg/LBrooklyn Center 79Golden Valley: 90 mg/LGolden Valley 90Blaine: 191 mg/LBlaine 191Shoreview: 192 mg/LShoreview 192Andover: 200 mg/LAndover 200Coon Rapids: 201 mg/LCoon Rapids 201Robbinsdale: 201 mg/LRobbinsdale 201New Brighton: 230 mg/LNew Brighton 230Champlin: 234 mg/LChamplin 234St. Anthony: 254 mg/LSt. Anthony 254Brooklyn Park 120mg/L as calcium carbonate060120180240300360+MN 160Brooklyn Center: 79 mg/LBrooklyn C. 79Blaine: 191 mg/LBlaine 191Coon Rapids: 201 mg/LCoon Rapids 201Robbinsdale: 201 mg/LRobbinsdale 201New Brighton: 230 mg/LNew Bright. 230Champlin: 234 mg/LChamplin 234120 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

At 120 mg/L, Brooklyn Park is 40 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 79 mg/L in Brooklyn Center to 254 in St. Anthony.

What 120 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 Brooklyn Park

3 people × 75 gallons a day × 7.0 gpg = 1,580 grains a day. A 24,000-grain unit regenerates about every 15 days.

Size it for your household

EPA record for Brooklyn Park's water system

Brooklyn Park · PWSID MN1270005

No health-based violations since 2016

Serves about 89,995 people from groundwater.

Health-based
0
Monitoring or reporting
4
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 Brooklyn Park water hard?

Somewhat. It measures about 120 mg/L (7.0 grains per gallon), which the USGS classes as moderately hard.

What is the water hardness in Brooklyn Park in grains per gallon?

About 7.0 gpg. One grain per gallon equals 17.1 mg/L, so 120 mg/L divided by 17.1 gives 7.0.

What size water softener do I need in Brooklyn Park?

For 3 people using 75 gallons each per day, 7.0 gpg works out to about 1,580 grains a day. A 24,000-grain softener covers that with a regeneration about every 15 days.

Has the Brooklyn Park water system had EPA violations?

EPA records show no health-based violations for Brooklyn Park since 2016. There were also 4 monitoring or reporting violations, which are about late or missing tests and notices.

Nearby cities

All 57 cities in Minnesota

Hardness data: TapWaterData US Water Hardness (utility report, September 30, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.