Abstract
It is a recognized fact among water works engineers that municipal water softening is being widely adopted. Even with the present heavy tax burdens, many citizens are willing to accept the added burden of expense in order to enjoy the use of soft water. Up to 1929 more than one hundred water softening plants were in operation in this country. Of this number, more than 30 per cent were located in Ohio. Until that time the majority of such plants were designed to operate as chemical softeners. Since then, marked interest has been shown in the use of zeolites, either alone or in combination with miscellaneous chemical treatments.
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