This study presents the influence of the storage recipients’ material and of the use and the type of stirring on the drinking water
quality. The kinetics of drinkable water quality alteration under stationary conditions and under magnetic and sonical stirring have
been monitored for a two weeks period. The microbiological parameters (total number of germs developed at 37°C and 22°C,
lactose-positive and lactose-negative bacteria, coliform bacteria and Echerichia coli), as well as the physico-chemical ones (turbidity
and chlorine amount) have been determined on a daily basis, indicating different alteration degrees of the drinkable water, as a
function of storage period and regime. It was found that glass not stimulate microbial growth while polyethylene recipients
represents a high risk factor from the bacterial growth point of view. Mechanical stirring as well as sonication are able to significantly
reduce the formation of the biofilm on the wall of the storage tanks, irregarding of the material from which the recipients are made
of. Sonication has been proven to be inefficient for water storage in polyethylene recipients, due to the increase of the temperature
and consequently of the planktonic bacteria activity.