Hindustan Times — news-marine life in ganga set for a splash as water quality improves

Address:

110077

This is as per news of paper released on 21 dec 2018, it is written that ganges water quality has been improved because the dissolved oxygen level of less than 3mg/l has been achieved.

While my concern is that each organism has its own do tolerance range and generally, do levels below 3 mg/l are of concern and waters with levels below 1 mg/l are considered hypoxic and usually devoid of life. This fact can be checked on epa (Environment protection agency) or in any related book.
Also there are several other factors like temperature, total suspended solids (Tss) and may more on basis of which we can decide water quality of river/stream water.

So, i would be happy if you guys revert back on this issue.