HydraMaster CDS 4.8 - Figure 1-1. Hard Water Map of Mainland United States

1-11: General Information
Hard Water Area Map
The hard water map, shown in Figure 1-1, denes hard water areas in the lower 48 United
States which compromise uid related components such as hoses, ttings, heaters,
pumps, valves and water-cooled engines. For other countries, hard water area maps can
be obtained from geological societies.
The map shown in Figure 1-1 is provided for general reference only. Water
hardness in your geographical location should be conrmed by testing.
Figure 1-1. Hard Water Map of Mainland United States