Relevance. Assessing pollution in urbanized areas under "heat island" conditions and snow cover, which accumulates emissions due to atmospheric inversions, low wind speeds, and dense urban development. Aim. To evaluate the eco-geochemical status of Kemerovo – a major chemical and thermal power plant – by analysing insoluble particulate matter in snow cover. Objects. Insoluble fraction of snow cover. Methods. Snow geochemical survey, instrumental neutron activation analysis, atomic absorption spectrometry, scanning electron microscopy, statistical/ecological-geochemical methods. Results and conclusions. Particulate load ranged 15–609 mg/(m²·day) (mean: 207). Hazardous pollution level (240–600 mg/(m²·day)) occurred in northern districts with residential zones, thermal power plant and chemical enterprises. Moderately hazardous (60–240 mg/(m²·day)) dominated in central areas. Allowable (20–60 mg/(m²·day)) is typical for western/southern sectors (low-rise housing, fertilizer production). Elevated concentrations of U, Yb, La, Ba, Ce, Sr, and others (2–22 background) formed distinct association (Sc-Co-Ba-La-Ce-Yb-Lu-Hf-Th-U) indicating moderate pollution. Microparticles of cerium phosphates, barium sulfates, lead sulfides with Zn/Fe admixtures were found, characterizing the modes of metal occurrence in the snow cover. Three atmogeochemical aureole were identified: 1. aureole with an association (Sc-Fe-Co-Rb-Sr-Cs-Ba-La-Ce-Nd-Eu-Tb-Yb-Lu-Hf-Th-U) cover the main part of the city and associated with emissions from plants and vehicles; 2. aureole (Cr-Zn-Br-Sb) located in residential and recreational areas, formed mainly by the influence of transport; 3. aureole (Ca-Cs-Ta-Th-Hg) confined to the zone of influence of thermal power plant and coke industry enterprises, where coal from the Kuznetsk basin is used. Geochemical associations in the insoluble fraction of snow cover can be used as an indicator of the geochemical background of the "urban heat island" formed by emissions from the thermal power plant and vehicles.