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707.15 Potable Water Applications
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Where collected rainwater is to be used for potable water applications, all materials contacting the water shall comply with NSF 61.
Collected rainwater shall be tested. Accumulated water to be tested shall be the result of not less than two rainfall events. Testing shall be in accordance with Sections 707.15.1.1 and 707.15.1.2.
Water quality testing shall be performed in accordance with the latest edition of APHA—Standard Methods for the Examination of Water and Wastewater and in accordance with Sections 707.15.1.1.1 and 707.15.1.1.2.
Accumulated rainwater shall be tested prior to initial use and annually thereafter for Escherichia coli, total coliform, heterotrophic bacteria and cryptosporidium.
Accumulated rainwater shall be tested prior to initial use and quarterly thereafter for pH, filterable solids, residual chlorine if disinfection is used, and turbidity. The pH shall be tested in accordance with ASTM D 5464; filterable solids shall be tested in accordance with ASTM D 5907; residual chlorine shall be tested in accordance with ASTM D 1253 and turbidity shall be tested in accordance with ASTM D 6698.
Test records shall be retained for not less than two years.
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