From January 26 to February 2, no excess of permissible concentrations of pollutants in the atmospheric air were recorded by automatic air pollution control stations in Kazan.
Sampling trips were also organized using a hand-held sampling pump for analysis on a wider list of substances. On January 25, sampling was carried out at 2 points Shadrin str., 1 and Golubyatnikov str., 28. The results of the tests are still in the works.