Are biosolids tested to ensure safety?

Biosolids must be analysed to ensure they meet the quality standards for land application, as defined in State, Territory and national Guidelines. These tests may include analyses for pathogens, nutrients, metals and any organic chemicals of concern (e.g. polychlorinated biphenyls or PCBs). The frequency of testing is based on the amount of biosolids generated by the treatment facility. In addition, biosolids producers must regularly monitor the treatment process.

A summary of the specific Guidelines for biosolids management in Australia and New Zealand can be found here.