The principal reasons behind WATER pollution are the problems like population in­crease, agricultural and industrial waste generation, sewerage disposal, radioactive waste generation, etc.

The sources of water pollution can be of TWO types:

Natural Sources –

(i) Dust:

Soil EROSION, volcanic eruption, landslides, storms, earthquakes.

(ii) Gases:

volcanic eruption and dead and decaying organic matter.

(iii) Organic Matter:

Decaying bodies of plant and animals in SWAMPS or deep ponds.

(iv) Rain Water:

Acid rain, especially in industrialized countries.

Man-made or Anthropogenic Sources –

(i) Pathogens:

Animal waste and human sewage

(ii) Organic Wastes:

Human and Domestic Sewage, Animal and Plant Waste, Wastes from agro-based industries. 

(iii) Inorganic CHEMICALS and minerals:

Agricultural runoff, domestic sewage, animal wastes, wastes from petrochemical, fertilizer and similar other industries, mining activities.

(iv) Heat:

Cooling water from industrial and power generating installation

(v) Radioactivity:

Nuclear plants.

The principal reasons behind water pollution are the problems like population in­crease, agricultural and industrial waste generation, sewerage disposal, radioactive waste generation, etc.

The sources of water pollution can be of two types:

Natural Sources –

(i) Dust:

Soil erosion, volcanic eruption, landslides, storms, earthquakes.

(ii) Gases:

volcanic eruption and dead and decaying organic matter.

(iii) Organic Matter:

Decaying bodies of plant and animals in swamps or deep ponds.

(iv) Rain Water:

Acid rain, especially in industrialized countries.

Man-made or Anthropogenic Sources –

(i) Pathogens:

Animal waste and human sewage

(ii) Organic Wastes:

Human and Domestic Sewage, Animal and Plant Waste, Wastes from agro-based industries. 

(iii) Inorganic chemicals and minerals:

Agricultural runoff, domestic sewage, animal wastes, wastes from petrochemical, fertilizer and similar other industries, mining activities.

(iv) Heat:

Cooling water from industrial and power generating installation

(v) Radioactivity:

Nuclear plants.