Effluent samples were collected from a tannery in Ambur, near North Arcot Dist, Tamil Nadu, India. The physico-chemical parameters of the effluent viz, colour, odour, pH, Electrical conductivity, TSS, TDS, BOD, COD, total hardness, calcium hardness, magnesium hardness, chloride, sulphate and total chromium were determined. The results revealed that almost all the parameters of Tannery Effluent were found to be high and exceeding the CPCB limits.

The wastewater generated from textile industries of Bhilwara city is studied for its characterization. Wastewater of textile industry was found to contain a high degree of pollutants with high TDS and suspended solids. The wastewater is highly colored and viscous due to dyestuff and suspended solids respectively.

The data on flow, BOD, COD, TSS and TDS were collected from the common effluent treatment plant (CETP) for the period from June '96 to November '96. The data were analysed to assess the performance of the CETP in terms of removal efficiency for the above mentioned parameters. The original design of individual units in the CETP were scrutinized for their authenticity.