Water used in the treatment process and boiler feed water is obtained from river water, reservoir water, bore wells and other spring sources. The water quality is not the same even though using similar water sources, this is influenced by the environment from which the water originates. Generally, river water sources have been polluted by population activities and industrial activities, therefore purification is necessary.

Boiler feed water must meet specified specifications so as not to cause problems with boiler operation. The water must be free of unwanted minerals and other impurities that can reduce the working efficiency of the boiler.

Feed water must meet certain prerequisites as described in the table below:

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