Environmental assessment

Page reviewed:  03/07/2025

In order to track the environmental condition of Lake Mälaren, water chemistry, phytoplankton, zooplankton and invertebrate fauna are sampled annually in the lake's different sub-basins.

Data can be obtained from Miljödata MVM. Use the links below to get directly to Lake Mälaren's sampling stations. You may need to adjust the time period and desired parameters. The earliest samples in the database are phytoplankton samples from 1955.

On the Swedish version of this page you can also read about measurements with sensors.