Chemical and biochemical indicators in the characterization of polluted waters from the Bahlui River, Iasi city sector

The alteration of physical, chemical and biological properties of water due to natural or atrophic factors makes it improper for daily use. The chemical composition of water from the Bahlui river is determined by the structure and composition of soil and rocks from the reception basin, by the climatic conditions, the amount of wastewater (domestic and industrial), by the sampling area etc. The results of physical-chemical investigation revealed o o that indicators as turbidity, pH, fixed residue, residue at 1800C, residues calcinated at 550 C i 900 C, ammonia concentration, phosphate concentration are over the normal standardized limits. The concentration of oxidable compounds in the Bahlui river water is far over the maximum admitted limits.