[Characteristics of chemical pollution of snow cover in Aktobe areas].

The paper gives data on the nature of snow cover pollution in the urbanized areas in relation to the remoteness from the basic sources of ambient air pollution. The total snow content of carcinogens has been estimated.

[Characteristics of soil toxic compounds levels in urbanized areas (in case of Aktobe)].

The paper gives data on the levels of toxic chemicals in the soil of an industrial town. Rationale is provided for dividing the microareas of an Aktobe residential zone in relation to the soil level of chemical carcinogens.

[Regional features of children's biological reactions to environmental factors].

The levels of trace elements in the biological substrates were comparatively analyzed in the children living in the towns of Aktobe, Orenburg, and Orsk. The values of blood metals were ascertained in the Aktobe children residing in the areas differently spaced from the town's industrial zone. Immunity was evaluated and the degree of immunodeficiency was established.

[Hygienic evaluation of transboundary pollution of the Ural River basin].

The anthropogenic pollution of the Ural River and its tributaries is the most important problem of the Ural-Caspian basin. Transboundary inflow from Kazakhstan to Russian is 30.9 km3/year.

[Integrated estimation of carcinogenic load on the population in the town of Aktobe].

Identification of carcinogens from the results of monitoring various environmental objects in an industrial town (Actobe) could single out 8 priority trace elements, which might cause their human accumulation. A carcinogenic risk was found to be formed due to the high ambient chromium pollution in the residential areas, to the accumulation of the elements in the deposited media and human body. Drinking water is a minor source of the identified carcinogens; therefore it may be borne in mind in the further analysis of a carcinogenic risk.