Ecological Status of the Timiş Stream, Affluent of the Olt River

All rivers, streams, estuaries, and lakes are assigned to a class based on the beneficial uses they could support if they had good water quality. The purpose of this study is the monitoring of the quality of water in order to set the framing Timiş stream into quality classes. Samples were collected between the period of January 2009 to July 2010 to determine the following parameters: pH, total suspended solids (TSS), biochemical oxygen demand (BOD), chemical oxygen demand (COD), nitrate and orthophosphates. The values of the calculated average concentrations of monitored parameters were compared with the limit values presented in Order 161/2006. The concentrations of the BOD, COD and nutrients fall the section in the III-IV class of the quality. Total suspended solids in samples taken from Timiş stream section showed concentrations which considerably exceeded value established in classification of the surface waters quality from Order 161/2006. Concentrations of BOD and COD corresponded to III class of quality and concentrations of nutrients corresponded to IV class of quality of water surface. Timiş Stream represent a critical point in terms of the quality of surface waters because is also, the wastewater receptor for some industrial units in the city of Braşov taking along with them also a part of untreated domestic wastewater trough the city sewer overflows