Dairy industry is one of the water consuming industry in India due to which there is more exploitation of natural resources. We have chosen Dairy Industry situated near our town for study purpose. The inlet raw milk is 1, 82, 000 l/day to process. For the processing of 1, 82, 000 l/day milk, water consumption is 3, 00, 000 l/day to 3,50,000 l/day. The ratio of water consumption rate is 1.64. The influent contains COD, BOD & pH etc. The influent COD ranges from 3200 mg/l - 3500 mg/l, which lead to waste generation in terms of SF and SNF. SF in the effluent is 367.33 kg SF and SNF in the effluent is 975.22 kg SNF. The ETP comprises of screen chamber, oil & grease tank & UASBR etc., which reduce COD load from 3800 mg/l to 25 mg/l. Stage wise efficiency has been identified and further UASBR efficiency is optimize. Process material balance & mass balance has been done for onsite treatment & waste reduction.