Within the framework of the sanitary and ecological two-month period, an air survey of the territories of Kazan, as well as 10 municipal districts was conducted: Arsky, Atninsky, Baltasinsky, Vysokogorsky, Kukmor, Laishevsky, Pestrechinsky, Rybno-Slobodsky, Sabinsky and Tyulyachinsky. The flight was made by the Deputy Minister of Ecology and Natural Resources of the Republic of Tatarstan Ayrat Shigapov.