The following parameters (Group A) shall be monitored in accordance with the monitoring frequencies set out in Table 1 of point 3:

1. (a)

   Escherichia coli (E. coli), coliform bacteria, colony count 22 °C, colour, turbidity, taste, odour, pH, conductivity;

2. (b)

   other parameters identified as relevant in the monitoring programme, in accordance with Article 5(3) and, where relevant, through a risk assessment as set out in Part C.

Under specific circumstances, the following parameters shall be added to the Group A Parameters:

1. (a)

   ammonium and nitrite, if chloramination is used;

2. (b)

   aluminium and iron, if used as water treatment chemicals.

In order to determine compliance with all parametric values set out in this Directive, all other parameters not analysed under Group A and set in accordance with Article 5 shall be monitored at least at the frequencies set out in Table 1 of point 3.