Photo: NZ Police

A new drug testing regime of our waste water will reveal what drugs are being used in our towns and cities, and in real time. Wastewater testing is set to be rolled out across New Zealand, with the expansion of the Police and the Institute of Environmental Science and Research's wastewater pilot programme. Thirty-eight sites across the 12 police districts will be covered by the end of this month, capturing 80% of New Zealand's population. Kathryn Ryan discusses with ESR Chief Executive, Keith McLea, how extensive the wastewater testing will be.