Estimated depth (M)

Fecal coliform count (dry season)

Risk level

Serlogical test for E. coli 157H

Fecal coliform count (rainy season)

Serlogical test for E. coli 157H

Risk level

Zone 1

4 - 25

1833.33 ± 216.,3^a

2 colonies

1166

2 colonies

Zone 2

10 - 25

583.33 ± 280^a

1 colony

233

1 colony

Zone 3

6 - 20

1083.33 ± 491.6^a

2 colonies

666

2 colonies

Zone 4

10 - 25

3916.67 ± 1068.5^b

0 colony

1916

0 colony

Zone 5

10 - 23

2208.33 ± 2379.2^ab

4 colonies

1333

0 colony

P-value

0.0123