How hard is my water?

Soft Water...............less than 1 grain per gallon

Slightly Hard..................1 to 3 grains per gallon

Moderately Hard............3 to 7 grains per gallon

Hard Water..................7 to 10 grains per gallon

Extremely Hard............over 10 grains per gallon

Average Hardness of local Municipal "City" Water Supplies:

Apple Valley  20 gpg

Bloomington   5 gpg

Brooklyn Park  21 gpg

Burnsville 16 gpg

Chanhassen   19 gpg

Chaska  23 gpg

Cologne  18 gpg

Cottage Grove  17 gpg

Crystal   5 gpg

Eagan  17 gpg

Eden Praire   6 gpg

Edina  17 gpg

Elk River   18 gpg

Farmington 16 gpg

Forest Lake  17 gpg

Fridley  16 gpg

Hopkins  18 gpg

Jordan  16 gpg

Lakeville  17 gpg

Maple Grove  19 gpg

Minnetonka  19 gpg

Minneapolis  5 gpg

New Hope  5 gpg

New Prague   20 gpg

Northfield   24 gpg

Oakdale   15 gpg

Prior Lake  19 gpg

Rosemount   17 gpg

St Louis Park  18 gpg

St Paul   4 gpg

Savage 23 gpg

Shakopee  23 gpg

Shorewood  18 gpg

Stillwater  14 gpg

Waconia 18 gpg

Wayzata  20 gpg

White Bear  14 gpg

Woodbury  17 gpg

Wyoming 18 gpg 

Example of hard water residue left from one gallon of water at 20 grains of hardness.