The method describes the determination of E. coli and coliform bacteria in mineral, spring and table water using double-concentrated DEV lactose peptone broth (based on Annex 2, Section 1.1a/1.2a to Section 4 (3) of the German Mineral and Table Water Ordinance of 1 August 1984, as amended on 5 July 2017).
Mineral, spring and table waters, as well as drinking waters that are to be marketed.
Qualitative detection of Escherichia coli and coliform bacteria using enrichment culture with double-concentrated lactose broth [1]. E. coli and coliform bacteria break down lactose, producing gas and acid.