Table 6.

Physiochemical characteristics of WQ in the river Ganga at downstream regions during April 2020.

Parameters	Units	Permissible limit (River)	Analysed values
			Bathing Ghat, Kanpur city	Narora, Uttar Pradesh	Varanasi, Uttar Pradesh	Murshidabaad, West Bengal	Howrah bridge, West Bengal
BOD	mg/l	$\le$ 3	1.20	2.17	1.89	1.65	0.59
DO	mg/l	$\ge$ 5	8.42	8.51	8.18	8.22	5
pH	Unit less	6.5 - 8.5	7.67	7.68	7.64	7.78	7.65
WT	${}^{\circ }$C	$\le$ 35	23.2	23.9	23.6	26.8	27.5
COD	mg/L	< 10	7.04	9	9.23	3.36	9
Total suspended solid	mg/L	< 10	10	8	9	9	9
Nitrate	mg/L	< 10	0.74	0.89		1.42	2.4
Turbidity	NTU	$\le$ 30	25	25	24	25	20.09