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Health effects of Drinking Water from Rainwater Tanks

Project Number # 1011

Health effects of Drinking Water from Rainwater Tanks

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This project consisted of a health study of 300 Adelaide households that were drinking rainwater. Adelaide was the location chosen for the study as it
has the highest use of rainwater tanks in Australia. This study was the first prospective randomised study to investigate the health effects of rainwater consumption, either in Australia or internationally.


The results showed that people who drank untreated rainwater displayed no measurable increase in illness compared to those whose rainwater was filtered. While the results may not be applicable in all situations, these findings about the low risk of illness from drinking rainwater imply that it can be  used for activities such as showering/bathing where inadvertent or accidental ingestion of small quantities may occur.

Project Documents