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Roof Harvested Rainwater - Indicator Organisms, Water Quality and Risk Assessment

Roof Harvested Rainwater - Indicator Organisms, Water Quality and Risk Assessment

Deriving maximum economic and water savings benefits from rainwater harvesting in the urban environment requires the use of rainwater for internal applicationsincluding showering/bathing, laundry and toilet flushing. Widespread use of rainwater for these applications has been hindered by uncertainty over quality and perceptions of health risk. This study examines the presence and abundance ofthe faecal indicators E. coli, enterococci and total coliform in over 100 water samples collected from rainwater tanks in eastern Australia. A large proportion of samples were compliant with the requirements of mains water drinking standards, especially among those collected via a hot water system, while almost universal compliance with bathing water quality standards was observed.

 

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