Explain water pollution and its control. 

Explanation

Water bodies are lifeline of human beings as well as other animals.
Due to disposal of all kinds of waste and other anthropogenic actions the ponds, lakes, stream, river, estuaries and oceans are becoming polluted in several parts of world.

The Government of India has passed the Water (Prevention and Control of Pollution) Act, 1974 to protect the water resources.
The sewage that comes out from house and office makes the domestic sewage.
A mere `0.1%` impurities make domestic sewage unfit for human use.
Solid wastes are relatively easy to remove but dissolved salts as nitrates, phosphates and other nutrients and toxic metal ions and organic compounds present in domestic wastes are comparatively difficult to remove.
Domestic sewage mainly contains biodegradable organic matter, which can be easily decomposed by microbes like bacteria and fungi.
They use organic wastes as nutrients.