Project Brief:

Service reservoirs (SR's) are treated water storage tanks, used to balance water supply and maintain the diurnal demand in the distribution network. Storage of treated water gained its importance with the need to protect water supplies from deteriorating, or becoming contaminated. SR’s are therefore crucial and integral components of the distribution system. However, SR’s affect water quality (WQ), deteriorating it in some instances. Primarily, these are aesthetic issues, such as appearance, taste, and odour. The assumption is that the deterioration of WQ comes from an accumulation of material (e.g. metals), and from areas of stagnation in the SR, both of which lead to issues such as biofilm growth, discolouration, and changes to water chemistry.

There is a pressing need to understand how SR performance impacts water quality. A nationally coordinated trial across multiple sites, analysing multiple factors is being conducted.

Findings, so far:

Service Reservoir Performance: Source or Sink of Material - poster (won 1st place at the STREAM annual conference 2018)

Using Historical Data to Analyse the Impact of Storage Tanks on Water Quality - presentation - AWWA WQTC annual conference 2019, Dallas, Texas

The Operational Value of Inlet Monitoring:

Service reservoir sediment sampling protocol

What accumulates in our drinking water storage tanks? - poster - IoW annual conference 2020 (won 1st place at the IWA young water professionals online Twitter competition 2021)

Assessing and quantifying SR performance using a practical metric; source or sink of material? - presentation - 'Service Reservoirs Challenges, Innovations, and Collaborations' conference 2021, University of Sheffield.



Anastasia Doronina (PhD researcher) - Blog

Professor Vanessa Speight (Primary Investigator) - Managing Director of TWENTY65

Dr Stewart Husband (PODDS)

Professor Joby Boxall



Sponsors and collaborators:

Anglian Water

Dwr Cymru Welsh Water

Northumbrian Water

Scottish Water




Panton McLeod

University of Colorado, Boulder