The effect of the mixing of water from different sources in the water supply system on tap water quality – a full-scale technical investigation case study

The paper presents a detailed analysis of the quality of water pumped into the network and sampled from 39 monitoring points located on the network. A difference in the quality of water sampled from two different sources has been demonstrated, as well as the impact of mixing of the two waters in the water distribution system on tap water quality. A mathematical model was used to identify the zones of water mixing and the areas of unfavourable hydraulic conditions (low flow rates and long retention times).