From December 22 to December 29, no excess of permissible concentrations of pollutants in the atmospheric air were recorded by automatic air pollution control stations in Kazan.
Also, at the request of residents, visits of a mobile environmental laboratory to the northern zone of Kazan and sampling using a hand-held sampling pump for analysis on a wider list of substances were organized. According to the results of these analyses and road trips, no excess was recorded in the residential area.