The National Green Tribunal (NGT) has raised concerns over high faecal coliform bacteria levels in the Ganga and Yamuna rivers in Prayagraj.
A report by the Central Pollution Control Board (CPCB) indicated high levels of faecal bacteria at various points along both the rivers near Prayagraj's Sangam
Contamination of faecal coliform occurred in water due to the mixing of human or livestock excreta.
Its levels indicate water quality and help in monitoring the presence of disease-causing bacteria.
The total coliform levels (faecal plus other) in the Ganga were found to be around 1,400 times the standard.
In the Yamuna, they were 660 times higher at certain locations in Prayagraj.
A 2004 committee formed by the Ministry of Urban Development recommended that the desirable limit of faecal coliform should be at 500 MPN/100ml.