Ecology Now

Water pollution is a subject that needs a closer study. The entire population in the world must be aware of this. Ground water, lakes, rivers and oceans are our sources of water. How does the water get polluted? Shouldn’t every one know this?
Toxic substances find its way and reach rivers, streams, lakes and ground water. They get dissolved or lay suspended in water. Sometimes the river beds carry this burden. Water gets polluted. For a while, we do not realize how much, the quality of water has deteriorated. Living beings in water such as fish get affected. They begin to die and float. That is when we notice and suspect such possibility. Ground water deposits get affected, when the pollutants seep down.
Industrial wastes pollute our clean water rivers and streams. They ignore the rules and regulations and try to save money for their own industry. Industrial waste water management is not one of their priorities. 90% waste water gets deposited in our rivers and streams. This water bodies end up in our kitchen. Such water is often highly contaminated and carries disease-causing microbes.
Don’t you care? There must be something you can do!
The water from the agricultural fields that drains into rivers and streams is another major water pollutant as it contains fertilizers and pesticides. Sanitary sewage or domestic sewage is another pollutant.
Biochemical Oxygen Demand (or BOD) is the quantity of oxygen required by micro-organisms to decompose the organic substances in sewage. BOD levels of industrial sewage is always much more than that of domestic sewage. The quality of water in lakes and rivers depend on the dissolved oxygen. Water quality is better when the concentration of dissolved oxygen is higher.

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Author Raveendran Nambyar