ABSTRACT
To provide the safety of the population and environment with the occurrence of man-caused catastrophes due their increase is now an urgent problem. Toxic hazard coefficients were calculated for hydrogen sulfide in the settlements located in a possible chemical pollution area in the Orenburg gas-chemical complex. Assessment of the hazard of toxic effects to the population upon exposure to hydrogen sulfide has indicated that there may be toxic effects in the inhabitants of the study nearby inhabited localities. The findings do not characterize the possible severity of intoxication so it is necessary to develop a system of criteria for the differentiation of the severity of negative effects in order to evaluate the hazard of acute chemical exposures.
