Table 3 Regional variation in the values of chemical parameters of drinking water

Alfadanga (Faridpur)

Median

7.4

0.3

0.6

400

0.033

IQR

0.3

0.4

2.5

150

0.063

Mean ± SD

7.4 ± 0.4

0.3 ± 0.2

2.0 ± 2.9

478.6 ± 210.0

0.047 ± 0.034

Kendua (Netrokona)

Median

7.4

0.2

0.5

200

0.007

IQR

0.4

0.4

1.4

100

0.01

Mean ± SD

7.6 ± 0.4

0.3 ± 0.3

1.1 ± 1.7

197.0 ± 243.0

0.031 ± 0.053

Shibchar

Median

7.4

0.9

2

450

0.045

IQR

0.4

0.9

3.9

500

0.028

Mean ± SD

7.4 ± 0.3

0.9 ± 0.6

2.0 ± 2.8

584.4 ± 352.1

0.057 ± 0.037

Rupsha (Khulna)

Median

7.4

0.2

1.4

1050

0.008

IQR

0.3

0.1

2.4

1050

0.013

Mean ± SD

7.4 ± 0.2

0.2 ± 0.1

2.3 ± 2.0

1180 ± 723.0

0.009 ± 0.006

Debhata (Satkhira)

Median

7.4

0.2

0.8

400

0.003

IQR

0.2

0.2

0.5

150

0.001

Mean ± SD

7.5 ± 0.4

0.3 ± 0.3

1.4 ± 1.6

391.7 ± 79.3

0.006 ± 0.006

Patharghata (Barguna)

Median

7.4

0.2

0.6

100

0.004

IQR

0.4

0.2

0.4

400

0.000

Mean ± SD

7.4 ± 0.3

0.2 ± 0.1

0.9 ± 0.7

717.5 ± 1133.2

0.004

Rangabali (Patuakhali)

Median

7.4

0.1

0.4

500

0.005

IQR

0.2

0.1

0.2

100

0.002

Mean ± SD

7.5 ± 0.3

0.1 ± 0.1

0.4 ± 0.3

557.5 ± 84.4

0.004 ± 0.001

Anwara (Chittagong)

Median

-

0.2

2.0

-

0.006

IQR

-

1.5

3.2

-

0.008

Mean ± SD

-

0.7 ± 0.8

2.8 ± 3.2

-

0.009 ± 0.008

Bijoynagar (B.Baria)

Median

7.3

0.1

0.3

100

-

IQR

0.0

0.2

0.9

0

-

Mean ± SD

-

0.3 ± 0.4

0.6 ± 0.8

-

-

Shajahanpur (Bogra)

Median

7.4

0.3

0.7

100

-

IQR

0.5

0.4

0.9

0

-

Mean ± SD

7.4 ± 0.3

0.4 ± 0.4

1.2 ± 1.4

-

-

Kamlganj (Moulvibazar)

Median

-

0.3

2.3

-

0.075

IQR

-

0.5

6.2

-

0.000

Mean ± SD

-

0.4 ± 0.3

5.0 ± 6.2

-

-

Sadar (Kurigram)

Median

7.4

-

-

100

-

IQR

0.5

-

-

100

-

Mean ± SD

7.5 ± 0.4

-

-

135.0 ± 62.2

-

6.5-8.5

0.1

0.3-1.0

150-600

0.05

6.5-8.5

0.4

0.3

250

0.01