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Increasing industrialization degree and its complexity has made studies of the environmental impact assessment to be a necessity. Enforcement of national legislation in line with European legislation going to need to implement wastewater treatment technologies that treatment levels to be above 90% for not influence the quality of the receiving water. In the present work are compared wastewater treatment technologies. Based on monitored values of physico-chemical indicators are the advantages and disadvantages. It is also studied and their compliance with environmental policies in the wastewater treatment .

To achieve an appropriate management strategy was monitored surface water quality in the county of Prahova. In this regard were determinate major physical and chemical indicators: pH, BOD5, COD, nitrates, nitrites, and suspended solids. Depending on the value of the data obtained was identified water quality classes corresponding to each surface water body studied. The correlation values obtained with the best solutions for water service and maintenance of water courses is a management plan for surface water in the county of Prahova. The novelty of the paper consists of study of water resources in the county and not in the Basin as is done at present by the Romanian Waters National Administration