The tap survey in Krakow was conducted as a part of screening tap survey, performed in Poland in 2010 for the purpose of joined research project: "Metals and related substances in drinking water in Poland". Sampling points were randomly selected on the base of regular geographical grid. All samples were collected using RDT (random daytime) sampling protocol. Obtained results show significant variations of all analyzed metals and metalloids concentrations along a way "from source to the tap". Concentrations of metals and metalloids in tap water samples also vary significantly. The highest variations show Zn -from 21 to 2845 μg/L, Cu - from 2 to 640 μg/L, and Fe -from 56 to 560 μg/L. 3% of samples fail to comply with 10 μg/L. lead standard. 17% of samples fail to comply with Fe standard.
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