Two of the three cities being monitored by researchers at the University of Saskatchewan have shown a drop in the amount of the virus that causes COVID-19 in sewage samples taken during the latest testing period. On Monday, the Global Institute for Water Security's report show a decrease of 79 per cent in viral RNA in North Battleford's wastewater when compared to the previous reporting period. The amount of delta variant found in the wastewater has also decreased by 47 per cent from the previous reporting period.