[The observation and assessment of air pollution in the region of the city of Silistra].

In the region of the town of Silistra there are no big industrial enterprises, sources of harmful emissions in the surroundings. After the starting in exploitation of the Metallurgical Works in Călăraşi [correction of Kalarash] in 1987 began the complaints of the population as result of episodic pollutions of the atmospheric air in the region. Productions of similar character emit in the atmosphere dust, sulfur dioxide, carbonic oxide, nitric oxides, hydrogen sulfide, fluorides, ammonia, pyridine, aromatic and polyaromatic carbohydrates, phenol and aerosols of heavy metals. For this purpose on the territory of the town of Silistra two stationary stations of HEI are functioning for systemic observation and evaluation of the atmospheric pollution for the indices: dust, sulfur dioxide, nitric dioxide, hydrogen sulfide, phenol and aerosols of heavy metals. All data are statistically processed by means of statistical programme packet "STATGRAPH".