What is polluted water?
Water pollution is the contamination of natural water bodies by chemical, physical, radioactive or pathogenic microbial substances. Adverse alteration of water quality presently produces large scale illness and deaths, accounting for approximately 50 million deaths per year worldwide, most of these deaths occurring in Africa and Asia. Water pollution may occur from natural causes such as sedimentation from severe rainfall events; however, natural causes, including volcanic eruptions and algae blooms from natural causes constitute a minute amount of the instances of world water pollution. The most problematic of water pollutants are microbes that induce disease, since their sources may be construed as natural, but a preponderance of these instances result from human intervention in the environment or human over population phenomena.
Why is water pollution more common in the developing countries of Asia, Africa, and South America and rarely in developed countries?
Following are the reasons for water pollution being more common in developing countries :
- Over population
- Improper sanitation facilities
- Improper watershed management system.
- Runoff of industrial chemical waste in rivers and water bodies.
- Large inefficiency in water channel infrastructure.
- Flow of sewage in main rivers and water bodies.
- Lack of sewage treatment and industrial discharge, groundwater is becoming increasingly polluted.
- Over irrigation
- Mixing of pesticides and insecticides in ground water.