WATETR POLLUTION

 Effects of Water Pollution

Eutrophication: Enrichment of water with ould have inorganic nutrients (nitrates and phosphates) is called eutrophication. The sewage and fertilizers contain large amount of inorganic material (nutrients). biles. Simla When sewage and fertilizers reach water ution by sud bodies, the nutrients present in them promote algal blooms (excessive growth) there (Fig. 16.19). Rich algal growth leads to increase in the number of the decomposers. Decomposers use the oxygen present in water and it results in the depletion of oxygen. Algal bloom also reduces the light reaching the lower layers in water

Food chain contamination: The non-biodegradable water pollutants may stay in water to long times. From water, they enter into small organisms, which are fed upon by fish in turn are fed upon by land animals including human

Epidemics Organic pollutants in water facilitate the growth of germs. Such polluted water causes epidemics like cholera, gastroenteritis etc. 

Control of Water

Public should be made aware of the dangers of water pollution. Before releasing the sewage into water bodies, it must be purified through sewage treatment techniques
Industrial wastes should also be treated before they are released into water bodies.