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The project harnessed the potential of house rooftops as rainwater
harvesters for household use, principally as drinking water. It
likewise assessed the system's technical soundness, environmental
dimensions, economic feasibility as well as its social and
political acceptability. Technically, the rainwater harvesting
system consisting of rooftops, gutters, down spouts, filter and
storage tank is capable of collecting/impounding rainwater to
supply and support the drinking water needs of 8-12 members of the
family throughout the six-month dry period (January-June) of the
year. In terms of rainwater microbiological quality, total
coliforms and Escherichia coli were of low concentrations (i, e.,
less than 1.1 MPN/100 ml) meeting the allowable limits set by the
Philippine National Standards for Drinking Water (PNSDW). Other
quality and aesthetic characteristics of collected/stored rainwater
such as the presence of inorganic and organic substances through
total dissolved solids as well as its total hardness adequately met
the PNSDW values indicating potability of the harvested rainwater.
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