Aquatic Pollution and Coastal Zone Managememnt (2+1)

Unit 1 : Classification of aquatic pollution

1.9.3.Biological pollution of water
Bacterial pollution of water is caused by the excretory products of warm blooded mammals including man,wild and domestic animals. Birds of various genera also degrade water. The main pollutants belong to the coliform group and certain subgroups, faecal streptococci and miscellaneous organisms.

Biological pollution is also brought about by other bacteria, viruses, algae, diatoms, protozoans, rotifers, crustaceans and plants. Contaminated water supplies frequently create infection of the intestinal tract (like dysentery, cholera, typhoid and gastroenteritis), polio and infectious hepatitis.