Legislation was passed that forced water companies to invest more in treating raw sewage and stop the continuous discharge of effluents around the coastline.
We have successfully applied technology to reduce the impact of power plants and autos on our air quality and the discharge of effluents into our waterways.
The direct discharge of effluents into the Noyyal River may have implications over microbial population, both qualitatively and quantitatively.
Owing to zero discharge of effluents, in 2011, 459 dyeing units were closed and only 54 factories were given permission after they installed ETP (Suchitra 2014).
The discharge of effluents containing heavy metals into water resources is a serious pollution problem which affects the quality of water supply.
The presence of chloride in natural water is attributed to dissolution of salt deposits' discharge of effluents from chemical industries oil well operations, sewage discharges initiation drainage, contamination from refuse leachates, and sea water intrusion in coastal area.
Discharge of effluents from industrial activities such as electroplating, mining, electrical and electronics, iron and steel production pharmaceuticals, pesticides, organic chemicals, rubber and plastics, etc. are major sources of the heavy metal contamination in the environment, especially copper.
This may be due to dilution of ions after monsoon, overexploitation of groundwater, direct discharge of effluents and agricultural impact (Singaraja et al. 2013; Thivya et al. 2013a; Thilagavathi et al. 2012).
