Exposure Assessment in Urban Reticulation Systems

Funded by: CRC for Water Quality and Treatment

This project will survey the practices of residents supplied with recycled water via a dual reticulation system (Rouse Hill, NSW) and a comparison area with conventional water supply to ascertain the frequency and duration of exposure to recycled water, particularly in relation to external household use. It will also compare and verify the relevance of indoor usage data (laundry and/or toilet flushing) collected for conventional reticulation throughout Australia, for Australian dual reticulation systems. This will enable refinement of exposure estimates and allow more accurate health risk assessment of the implications of supplying recycled water for non-potable uses via dual reticulation systems in the Australian context. Data obtained will provide input into the Quantitative Microbial Risk Assessment process, which is being employed for the development of the National Water Recycling Guidelines.