The microbiological quality of drinking water supplies of Izmir City: the incidence of Yersinia enterocolitica.

A total of 100 water samples collected from piped public supplies, wells with and without motor pumps, springs and commercially bottled spring waters were microbiologically examined. In order to determine microbiological quality, aerobic bacterial and coliform counts were estimated and the presence of Escherichia coli and Yersinia enterocolitica was investigated. Of the samples tested, 85 of them met the specifications set by TFR (Turkish Food Regulation) for coliforms, whereas 72 of them met the specifications for aerobic bacteria. The number of samples containing Y. enterocolitica and E. coli were found to be 6 and 5, respectively.