The article presents evaluation of sewage treatment plant in Wadowice operation on the basis of pollutants’ reduction in the period from January 2003 to December 2005. Additional aim was analysing amount of inflowing sewage in the research period. Evaluation of operation capacity was based on reduction size of 5 chosen pollutants’ indexes: BOD5, COD, total suspended solids, general nitrogen and general phosphorus. Values of above mentioned pollutants’ indexes in treated sewage were compared to values from water-law permission given by Wadowice Starost for Wadowice Waterworks and Sewerage Utility Sp. z o. o. from 28.03.2006. Results of analyses of treated sewage composition show, that mean values of BOD5, COD, total suspended solids, general nitrogen and general phosphorus are lower than the admissible values from water-law permission. In the case of BOD5 mean value on the outflow (14,0 mgO2·dm-3) is almost 7% lower than the admissible value (15 mgO2·dm-3), COD (mean value 89,15 mgO2·dm-3) – 28,7% lower than the admissible value (125 mgO2·dm-3), total suspended solids (mean value 27,27 mg·dm-3) – 22,1% lower than the admissible value (35 mg·dm-3), general nitrogen (mean value 22,17 mgNgen·dm-3) – 26,1% lower than the admissible value (30 mgNgen·dm-3) and general phosphorus (mean value 1,26 mgPgen·dm-3) – ...
