الوسم: الحادي

Major pollution problems of surface water

Major pollution problems of groundwater

Reduction and prevention of water pollution
Drinking water quality

Types, Effects, and Sources of Water Pollution
•Water is polluted by infectious bacteria, inorganic and organic chemicals, and excess heat.


•Water pollution is any chemical, biological, or physical change in water quality that has a harmful effect on living organisms.


•The WHO estimates that 3.4 million people die prematurely each year from waterborne diseases.


•In the U.S., an estimated 1.5 million people a year become ill from infectious agents.

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