The physico-chemical quality of the potable water, provided by the waterworksof the selected poviat from Lesser Poland voivodeship, was evaluated.The evaluation included the period of 2003-2006. The objects of the research were20 waterworks' and they were tested for the following water quality indexes: turbidity,reaction, conductivity, ammonia, nitrites, nitrates and fluorine. The resultsfrom the water quality examination, performed by the Sanitary and EpidemiologicalStation, were also used for the analysis. In order to find the variability of eachindex, apart from their average values, also the maximum and minimum amountswere counted, as well as standard deviation and the amount of transgressions ofthe admissible value of the index. The research showed high variability of the indexes'values between different waterworks during the analyzed period. Thesedifferences are clearly seen when comparing the waterworks which use thegroundwater and the waterworks which use the surface water. These first waterworksprovide water of better quality. The physico-chemical properties of watertaken from the tested waterworks are 64,3% consistent with the Ministry of HealthRegulation on the potable water quality. The majority of problems in the group ofphysico-chemical indexes is caused by the transgressions of the water turbidity indexes.In case of the groundwater intakes, the admissible value - 1 NTU was exceededby 19,2% ...
