moderately significantp < 0.05
Two recent studies from Mexico and Argentina observed moderately significant and positive correlations (r 2 = 0.40–0.75; p < 0.05;) between SARS-CoV-2 RNA concentration and corresponding faecal coliform bacteria in surface water and groundwater samples impacted by wastewaters ( Mahlknecht et al., 2021 ; Maidana-Kulesza et al., 2021 ).