Treatment plants are different from one systemto the next, but all
the systems in this study use chlorination for primary and secondary
disinfection,with one exception (one systemwith chloramination as secondary
disinfection). It is important to note that there is a basic difference
between the two provinces regarding treatment (Table 1).While QCmunicipalities
generally apply a physico-chemical treatment to raw water,
none of the systems in NL use treatment other than chlorination (directly
applied to raw water).