From November 20 to December 1, no excess of permissible concentrations of pollutants in the atmospheric air were recorded by automatic air pollution control stations in Kazan.
Visits to the northern zone of Kazan were also organized to take samples using a hand-held sampling pump for analysis on a wider list of substances. According to the results of the analyses, no excess was recorded. The results of the analyses from the sampling on November 30 are still in the works.