This map shows ground water hardness in the continental United States.
It is meant to be used only as a guide. Hardness can vary from this chart and we recommend that you have your water tested
to be sure of the hardness level. If you would like to send us a water sample we will be more than happy to test the
hardness of your water for free. If you have city water simply call your water company and ask how hard your water
is.
