Below are five graphs with observations of 5 groups of hydrobionts in lake Baikal in 2016, and in 2015 for comparison. The x-axis shows the months of 2015 and 2016, and the y-axis shows the average value of the population or the total mass index for the time of observation. Each chart has the dash-lines consisting of horizontal lengths of the survey time (month, 2 months or a whole year)

Analysis of hydrobiological characteristics for 2016 evidences the increase in anthropogenic pollution of lake water in the area of municipal sewage drainage in Baikalsk in the spring and summer periods.

In the northern Baikal area, the analysis of data on the bacterioplankton and phytoplankton populations showed that the western coast was the most polluted in the spring and summer period, and the eastern coast was the most polluted in the autumn.

In different observation seasons, the bottom sediments were polluted in both the western and eastern coastal zones.

In the area of the Selenga shallow water, the analysis of the hydrobiological survey of the surface layer of the water column indicates an ongoing intake of easily oxidized organic matter with the waters of the river Selenga. It mostly affects the southern and middle parts of the Selenga shallow waters, where the maximum development of bacterial and phytoplankton is recorded.