Question

Indicator of water pollution
(a) E. coli (b) Chlorella
(c) Beggiatoa (d) Ulothrix

Answer 1

Answer:

a) E.coli is the indicator of water pollution

Answer 2

Indicator of water pollution is E. coli. So, option (a) is correct.

• E. coli stands for Escherichia coli. It is a fecal bacterial that comes from human and animal body wastes.
• It is mainly used by they environment protection authorities to check whether the fresh water is safe for usage.
• If there is a presence of disease causing bacteria and viruses in the fresh water, then the E.coli indicator has a higher value.
• Level of E. coli has an increased value during flood conditions.
• Level of E.coli is measured by the number of colony forming units. For instance, standard water quality for E.coli is  394 colony forming units per 100 ml.