Table 2 Comparison of the average metal levels (mg/L) in the groundwater with national/international guidelines and worldwide reported levels.

GWF, Bogra, Bangladesh

0.045

0.033

0.053

0.042

0.076

0.024

0.080

0.311

This study

GWP, Bogra, Bangladesh

0.064

0.038

0.048

0.053

0.068

0.012

0.097

0.180

GWR, Bogra, Bangladesh

0.035

0.046

0.048

0.040

0.083

0.027

0.107

0.233

Skhirat region, Morocco

ND

ND

0.0552

0.262

0.21

ND

0.382

0.0154

[101]

Bulawayo, Zimbabwe

ND

0.023

0.183

0.113

ND

0.003

ND

ND

[102]

Lagos State, Nigeria

ND

ND

2.4

ND

ND

0.02

ND

0.04

[103]

Kasur, Pakistan

ND

0.040

0.143

1.32

0.108

ND

0.073

0.135

[104]

Dhanbad, Bihar, India

ND

0.00155

0.0142

0.0025

ND

0.0055

0.232

0.507

[105]

Parichha, Jhansi, India

ND

ND

0.419

0.047

0.057

ND

0.085

ND

[106]

West Bokaro coalfield, Jharkhand, India

0.00041

ND

ND

0.0018

0.0152

0.00265

0.04008

0.02365

[107]

Kapas Island, Terengganu, Malaysia

0.00196

ND

0.000834

0.0238

ND

0.000484

0.0485

0.00594

[108]

Wadi Ranyah, Saudi Arabia

ND

ND

0.32

ND

ND

0.77

0.25

1.37

[109]

Manukan island, Malaysia

ND

ND

ND

0.00057

0.00079

ND

0.0428

0.0304

[110]

Rupnagar District, Punjab, India

ND

0.009

0.027

0.036

ND

0.107

0.258

0.750

[111]

Golgohar iron ore mine area, Iran

0.0951

ND

0.0539

ND

0.0133

0.016

1.378

0.1388

[112]

Southern Punjab, Pakistan

3.79

0.07

0.04

0.04

0.21

0.75

0.16

0.46

[113]

WHO limit

0.01

0.003

0.01

0.05

0.02

2

0.1

4

[30]

USEPA limit

0.01

0.005

0.005

0.01

-

1.3

0.05

5

[58]