Decree No. 33 of the Ministry of Public Health validating Hygienic rules and regulations setting requirements for contents in the air of hazardous substances causing summation effect.

This Decree establishes maximum allowable limits of contents in the air of hazardous substances causing summation effect in urban and recreational areas. The scope of this Decree shall be protection of environment and public health against negative impact caused by air pollution. It contains the list of chemicals and pollutants, and calculation formula for determination of maximum allowable limits of contents thereof in the atmospheric air.