PWD - Water Resource Organization Study finding

Senthilnathan (2004), study the micro level environmental status report of river Noyyal Basin. Most of the industries are located on either side of the Noyyal river bank at Tiruppur. These industries especially dyeing and bleaching units are the water consuming one. Nearly 9,000M³T of effluent from these industries are released directly in to the river Noyyal with incomplete treatment. This ultimately affects the river surface water system severely. The characterization of the water quality of the surface water samples of the river Noyyal is found higher and well above the threshold limit. Though the surface water is clear it looks slightly gray colour due to the domestic effluent mixed with the industrial effluent. Thus the water samples were very turbid throughout these areas. The colloidal material associated with turbidity provides adsorption surface for various chemical wastes from the industrial treated effluent. The chemical composition is likely to be greatly affected by the nature and amount of effluent dumped into it as well as biotic and abiotic processes in the water body.