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.