Define/Explain: Point sources of water pollution.

High coliform count in water is an indicator of

When can it be said that the level of pollution in water is high?

What are the various constituents of domestic sewage? Discuss the effects of sewage discharge on a river.

Common indicator organism of water pollution is

Domestic and hospital sewage often contains many undesirable pathogenic microorganisms. If discharged into water bodies without proper treatment, which of the following diseases can be caused?
$I-$ Dysentery or Diarrhoea
$II-$ Typhoid
$III-$ Hepatitis
$IV-$ Cancer
$V-$ Cholera
$VI-$ $AIDS$