Like Levesque et al. (1994), and Baumgartner and Grand (2006), we were be able to show that the aerobic plate counts increase in dispensers. It is well known that, as has been described in previous studies (Baumgartner and Grand, 2006 and Kokkinakis et al., 2008), the unprocessed bottled water is naturally colonized with bacteria at high levels (up to 5.11 CFU/ml in our study), and therefore HPC is not a suitable criterion for estimating the hygienic quality of bottled water. Nevertheless, plate counts may be useful to analyze the effect of dispenser cleaning.