Conclusions: In order to assess the microbial evaluation and effect of season on Hazratbal sewage treatment plant, astudy was carried out during 2010-2011. The results showed significant (p<0.05) differences in total coliform betweenwastewater (raw) and treated wastewater (final) from the sewage treatment plant. The comparison of percentageefficiency rate of the treatment plant showed significant differences among different microbial parameters. Removalefficiency rate was greater in Faecal Coliform (72.33%) and least for Faecal Streptococci (38.70%). The results showedsignificant variation among different seasons (p<0.05). It seems from the data that season play an important role inpredicting the efficiency of this sewage treatment plant. The greater efficiency rate was observed in summer and autumnmonths and least in winters. Finally it was concluded that although Hazratbal sewage treatment plant succeeded inremoving some pathogens from the influents, but it is little less than the required and efficiency rate did not reach to thelevel of national and international standards and as such discharge of effluent from this sewage treatment plant into thelake is not suitable.
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