Discovering Differences in Iron and Manganese Behaviour in Service Reservoirs

Abstract

[EN] Service reservoirs (SRs) are crucial components in drinking water distribution systems (DWDSs). In the UK, regulatory monitoring is conducted infrequently at SR outlets and for disinfectant residual and bacteriological indicators only, providing limited information on SR performance and its effect on drinking water quality. In this research, long term monitoring at the inlet and outlet of multiple SRs across the UK for various water quality parameters, and analysis of accumulated material collected from SRs during maintenance activities, provided valuable information on iron and manganese behaviour in these assets. Results showed that a lower proportion of iron appears to be retained within SRs in comparison to manganese. These findings challenge the understanding of how water quality risks posed by iron and manganese (e.g., discolouration) manifest in SRs and this knowledge can be used to help inform a targeted approach specific to SRs for the proactive management of those risks.