Region

Sample-1

Sample-2

Sample-3

Average

Sadar

1.53 × 105 CFU/mL (1000 feet deep supply water sample)

1.98 × 106 CFU/mL (500 feet deep motor water sample)

1.77 × 106 CFU/mL (450 feet deep tube well water sample)

6.35 × 106 CFU/mL

Kabirhat

8.5 × 106 CFU/mL (60 feet deep tube well water sample)

1.13 × 105 CFU/mL (70 feet deep tube well water)

1.58 × 106 CFU/mL (150 feet deep tube well water)

7.13 × 106 CFU/mL

Chatkhil

3.1 × 106 CFU/mL (35 feet deep tube well water sample)

5.8 × 106 CFU/mL (256 feet deep tube well water sample)

8.9 × 107 CFU/mL (800 feet deep tube well water sample)

3.26 × 106 CFU/mL