Water Hardness Test Color Chart

A hard water kit includes test strips and a color chart.

Water hardness test color chart.

The hardness of high quality water should not exceed 270 mg l 15 5 grains per gallon measured as calcium carbonate. Treated or softened water 0 1 gpg total grains x 17 1 equals ppm slightly hard 1 2 gpg total grains x 17 1 equals ppm medium hard 3 7 gpg total grains x 17 1 equals ppm hard 7 10 5 gpg total grains x 17 1 equals ppm extremely hard water 10 5 gpg total grains x 17 1 equals ppm. After filling a glass with cold water from your bathroom sink insert the test strip for several seconds and then remove it. Dip one test strip into a 200ml 8oz water sample for 15 seconds with a constant gentle back and forth motion.

Complete color matching within 10 seconds. Water softer than 30 to 50 mg l may be corrosive to piping depending on ph alkalinity and dissolved oxygen. Grains per gallon is the business standard approach for talking about water hardness. Match the color on the strip after you wet it with your test water against the color chart to see the hardness of your water sample measured in ppm or gains.

Remove the strip and shake once briskly to remove excess water. Culligan claims that 85 of the us has hard water. Before you can do anything about hard water you need to confirm that s the actual problem. A typical water hardness test kit that uses water strips provides with each strip a color chart.

Water softeners will correct hard water of more than 270 mg l. You can purchase a test kit from a home improvement store for 5 to 10 or request a free water test strip from us. How to test for water hardness. A typical water hardness test kit strip measures hardness from 0 1000.

Contingent upon where a water test is performed this data will be accounted for in mg l milligrams per liter or gpg grains per gallon. Ppm 0 250 500 mg l copper cu 1 cu 2 test procedure. Wait 25 seconds then match to the color chart above. Look for your area on the map to see if you re likely to have it in your home.

A typical water hardness test kit strip measures hardness from 0 1000 ppm or from 0 59 grains of hardness.