Industrial manufacturing processes may be releasing in the waste effluents some of residuals.
Total BHC is abnormally high to be about the order of 34.000 nanograms per litre was found in Peddavagu and in Muthangi it was about 1.620 nanograms per litre and the nala originating from voltas chemical industry was 1.450 nanograms per litre.
Aldrin in Peddavagu is 6.950 nanograms and in the Pocharam open well it is reported about 166 nanograms per litre.