Pollution
Water – The Elixir of Life
Can you imagine life without water? Take a minute and think about it. We need water for all our daily essential activities – drinking, bathing, cleaning… In fact, every living thing on this planet needs water
Water pollution
And what do we do with this vital resource? We take its all important ability – we all know that water can dissolve many of the thing that we dump in it – to make it a giant rubbish bin. In fact, we even throw things in it that water cannot dissolve, thus making the water unfit for drinking or any other use. Water, that once was the elixir of life, thus becomes the carrier of death and disease. The perfect example of the river Ganga, which is now one of the most polluted rivers in the world today.
Sources of water pollution
Sources of Water Pollution
Sources of water pollution, particularly groundwater pollution are group under two categories based on the origin of the pollutant. Point Source Pollution
Water pollution caused by point sources refers to the contaminants that enter the water body from a single, identifiable source like pipe or ditch. Point source pollutants can be discharges from sewage treatment plant, factories or a city storm drain.
Nonpoint Source Pollution
Pollution caused by nonpoint sources refers to the contamination that does not originate from a single source. Nonpoint source pollution is the cumulative effect of small contaminants gathered in large area.
Leaching of nitrogen compounds from agricultural land, storm water runoff over an agricultural land or a forest are examples of nonpoint source pollution.
Some major water pollutants are: Sewage - Sewage pollutants include domestic and hospital wastes, animal and human excreta etc. The sewage let off causes oxygen depletion, spread of diseases/epidemics.
Metals - Metals like mercury are let off into water bodies from
industries. Heavy metals like mercury cause poisoning and affect health