Evidence of COVID-19 continues to show up in the wastewater of Saskatchewan cities being studied by researchers at the University of Saskatchewan. On Tuesday, the Global Institute for Water Security said it had found a spike in viral RNA in samples taken from Saskatoon and North Battleford's wastewater treatment plants. The study showed a 127 per cent increase in viral load in Saskatoon week over week and a 560 per cent increase in North Battleford. Meanwhile, Prince Albert's showed a 50 per cent week-over-week decrease in viral load in its samples.