Table 2.

Heavy metals and metalloids pollution in major Bangladesh rivers (mg/L).

City	River	Major Sampling Location	Sampling Period	As	Pb	Cd	Cr	Reference
Dhaka	Buriganga	Kawtail, Postagola, Sodorghat, Modinanagar	October 2012 to August 2013	NA	NA	0.0104 ± 0.006	0.177 ± 0.11	[65]
Dhaka	Buriganga	Both sides of River from Rayer Bazaar to Pagla (30 km)	March 2010	0.134 (0.005–0.22)	0.119 (0.1–0.21)	0.059 (0.03–0.09)	0.114 (0.012–0.18)	[66]
Dhaka	Buriganga	Balughat, Shawaryghat, Foridabad		NA	0.065 ± 0.0047	0.0093 ± 0.0014	0.587 ± 0.0441	[63]
Dhaka	Turag	Tongi Heavy Industrial Area	NA	NA	0.073–0.1	0.002–0.003	0.039–0.061	[55]
Dhaka	Tongi (lake)	Tongi Heavy Industrial Area	March–April 2008	0.002	0.002	0.003	NA	[67]
Chitagong	Karnaphuli	Fishery ghat, Chaktikhal, Mojjartek, Kalurghat	NA	NA	0.14 ± 0.031	0.01 ± 0.002	0.25 ± 0.068	[13]
Chitagong	Karnaphuli	Fishery Ghat, Sea port, Custom House, marine Academy Bangladesh Jetty	September 2014 (summer)	0.023 ± 0.007	0.0098 ± 0.0047	0.0065 ± 0.003	0.067 ± 0.017	[8]
Chitagong	Karnaphuli	Fishery Ghat, Sea port, Custom House, marine Academy Bangladesh Jetty	March 2015 (winter)	0.034 ± 0.0098	0.0168 ± 0.0061	0.0106 ± 0.0045	0.087 ± 0.0174	[8]
Bogra	Karatoa	Bogra district urbanized area	February–September 2013 (winter)	0.046 ± 0.027	0.035 ± 0.019	0.011 ± 0.008	0.083 ± 0.027	[68]
Bogra	Karatoa	Bogra district urbanized area	February–September 2013 (summer)	0.037 ± 0.024	0.027 ± 0.015	0.008 ± 0.006	0.073 ± 0.027	[68]
Bagerhat	Pasur	Near Mongla port	January to June 2013	NA	NA	NA	0.02	[69]
Mongla, Bagerhat	Pasur	NA	NA	0.0276–0.01673	0.01269–0.04267	0.0042–0.0198	0.0276–0.07739	[70]
Kurigram	Brahmaputra	Chilmari	NA	NA	0.037	NA	NA	[33]
Standards for Irrigation (maximum concentration)				0.1	0.01	5.0	0.1	[71]

Notes: NA, not applied/reported. For metal and metalloid concentrations, some values were reported with standard errors, and some were reported with concentration range in brackets.