Sample No

Total Coli form (MPN/100ml)

Fecal Coli form (MPN/100ml)

E. coli form (MPN/100ml)

HM₁

22

Present

Present

$H{M^{\prime }}_1$

16

Present

Present

HM₂

12

Absent

Absent

HM₃

26

Present

Present

$H{M^{\prime }}_3$

27

Present

Present

HM₄

11

Absent

Absent