COVID19 contamination in ...
Published by Dr Harshvardhan Modak, Vice President, National Solid Waste Association of India, MD, Aquarion India,
COVID19 contamination in treated water indicates improper treatment to sewage/drinking water/ effluent.
In the traditional treatment processes, at the fag end, either chlorination or ozonation is envisaged to avoid any microbiological contamination.
This is done to ensure a certain excess of residual chlorine or ozone, then there is likelihood of further contamination, till it reaches the users.
The very fact that COVID19 was noticed in treated water, itself suggests that recontamination has happened & the same could not be prevented due to absence of residual chlorine/ozone.
Thus suffice it to say that under compliance of treatment standard alone has given rise to this observation.