For both deep and surface water entering the Tjärnö Lasse lab, salinity and temperature are continuously measured. It can be seen on the Water and weather data web page.
The water intake is at 45 metre depth. In the Pump House incoming water is flowing through a 10 mm coarse sieve and is pumped through filter with sand in three layers (6-8 mm, 3-4 mm and 1-2 mm) to the water reservoir above White Residence. From there the water flows to the Education Building, Lars Afzelius' Laboratory, White Laboratory, Yellow Laboratory and Ecotron. In total there are deep or surface water available from about 800 taps. Compiled measurement results from 2009-2018 are shown in diagrams below.