Circular Water Challenge

This project will describe water resources, real water needs, and how water can be saved on six islands in the Baltic Sea (Oaxen, Sandhamn, Möja, Brändö, Kökar and Örö).

Illustration: Christian Pleijel/KTH

Project name: Circular Water Challenge
Project leader: Christian Pleijel, KTH
Participating universities/ companies/organisations: KTH Royal Institute of Technology
Project period: 2018-2019
Financing: Region Stockholm (Sweden), Södertälje kommun (Sweden), Värmdö kommun (Sweden), Ålands landskapsregering (Finland), Kökar kommun (Finland), Brändö kommun (Finland), Forststyrelsen (Finland), Nordiska skärgårdssamarbetet.

This project will describe six islands in the Baltic Sea (Oaxen, Sandhamn, Möja, Brändö, Kökar and Örö) based on a model where the island is sliced ​​into three levels: the natural landscape (water supply, hydrogeology, environment), the social landscape (settlement, activities, needs in time and space), and the technical landscape (VA infrastructure including costs). When applying the model to an island, you get a clear picture of the island's water resources, real water needs, and where you can save water by reducing the load on outlets, production and drainage. The project will then propose an object on each participating island that can apply circular aquaculture, and make a plan for this.


Återanvändning av avloppsvatten ska lösa vattenbrist i skärgården, i P4 Stockholm 2019-07-31

Purified wastewater is reused in toilets, on SVT (in Swedish), 2019-05-14

Short film about Circular water challenge in the Stockholm Archipelago (in Swedish), 2019-02-08

Circular Water Challenge off to a good start!, 2019-01-23

Mellanrapporter (in Swedish):

Mellanrapport 1 (pdf 4.4 MB)

Mellanrapport 2 (pdf 1.4 MB)

Mellanrapport 3 (docx 2.2 MB)


Christian Pleijel,