How do we measure and maintain the quality of the most important natural resource we have – clean water?


How do we measure and maintain the quality of the most important natural resource we have – clean water?


Identify and measure crucial substances in the city’s lakes, watercourses and water supply system. Water monitoring today is basically depending on manual field sampling and analysis in laboratories, which is a costly and time-consuming activity.

The proposal consists of three sub-projects:

  • Water monitoring into and in lake Mälaren to identify chemical substances of concern
  • Water monitoring in the pressurized water pipes to identify pathogens
  • Water monitoring in the sewage system to identify discharges from industries

The project is supported by Vinnova.

Project owner Stockholm City

Project is in phase 2, financed in part by Vinnova.

Stockholms stad (Miljöförvaltningen), Stockholm Vatten och avfall AB, Ericsson, Telia, KTH, Stockholms universitet, Linköpings universitet

Maya Militell

Övrig projektgrupp

Bin Xiao – Ericsson

Carlo Fischione och Viktoria Fodor – KTH

Gia Destouni och Zahra Kalantari – SU

Mats Eriksson – LiU

Marie J. Karlsson, Joakim Strandh och Henrik Werner – Telia

Tommy Giertz – SVOA

Juha Salonsaari – Stockholms stad, miljöförvaltningen

More on water quality

Good water status is an important priority area for both the City of Stockholm and the EU. To ensure that the city's watercourses maintain good quality and comply with the EU Water Directive, sensors or other technologies can be used to measure the composition of the water in real time. The data collected can then made available to the public in real time. This will make the city’s water status easy to follow.

Data that is produced can also be used as a basis for simulation of the effects of new building near watercourses, for example.

In order to ensure that drinking water is always of high quality, continuous measurements of impurities can be made for comparison with the requirements that have been set for water quality. This would make it possible to identify emissions at an early stage and take action to minimise the impact on water quality. Continuous high water quality can also reduce the risk of disease spreading and thus the risk of epidemics breaking out. If water quality can be measured in several places, it makes it easier to identify areas in which a water quality problem has occurred, which in turn makes it easier to take measures so that the impact on drinking water can be minimised.


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