This might be explained by the type of raw waters under study (QC: 9 rivers
and 5 lakes, NL: 3 rivers and 9 lakes — See Table 1). However, average
turbidity for the lakes in QC and in NL was comparable (0.9 NTU for
QC and 0.8 NTU for NL), and turbidity for rivers significantly higher in
QC than in NL (2.6 NTU for QC and 0.7 NTU for NL). Detailed results
are presented in SI4.