Water Hardness Chart Us
Colors represent streamflow from the hydrologic unit area.
Water hardness chart us. Map edited by usepa 2005. Mean hardness as calcium carbonate at nasqan water monitoring sites during the 1975 water year. Most water utilities try to provide water that is not in the very hard category because of the unpleasant effects such as scaling in equipment and the need for more soap and synthetic detergents. 4 click the arrow that is located at the top left corner of the map to zoom out.
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. Map of water hardness in the united states public domain thumbnail medium original. Water hardness scale chart this is the measure of the amount of calcium and magnesium dissolved in your water. Grains per gallon is the business standard approach for talking about water hardness.
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. 3 click on an area without a city to open a pop up box detailing the average state water hardness. How to use the interactive water hardness map. Instead there is a generally accepted division of water into categories of soft moderately hard hard and very hard as explained in the water hardness chart.
1 click on a state to zoom in.