Part A Microbiological parameters for which methods of analysis are specified

The methods of analysis for microbiological parameters are:

1. (a)

   Escherichia coli (E. coli) and coliform bacteria (EN ISO 9308-1 or EN ISO 9308-2);

2. (b)

   intestinal enterococci (EN ISO 7899-2);

3. (c)

   colony count or heterotrophic plate counts at 22 °C (EN ISO 6222);

4. (d)

   Clostridium perfringens including spores (EN ISO 14189);

5. (e)

   Legionella (EN ISO 11731 for compliance with the value in Part D of Annex I);

   for risk-based verification monitoring and to complement culture methods, in addition methods, such as ISO/TS 12869, rapid culture methods, non-culture-based methods, and molecular-based methods, in particular qPCR, can be used;

6. (f)

   somatic coliphages;

   for operational monitoring, Part A of Annex II, EN ISO 10705-2, and EN ISO 10705-3 can be used.