Lack of proper sanitation in water leads to diseases like cholera, malaria and diarrhea.

Bacteria viruses or fluorides, nitrates, sulphate, etc., present in drinking water cause disease of serious nature. Of these, inorganic pollutants include arsenic and the metals cadmium, mercury, lead, nickel, zinc and copper. Resort owners, commercial fisherman and the communities that are benefited from such recreational activities suffer considerable economic damage from different types of water pollution.

The trout eggs will not develop in water having temperature above 14°C.The thermal pollution causes interference in spawning and reproduction of fish since all fish require an optimum temperature for breeding. They reach water bodies through point and nonpoint sources. Exposure to chloroform can damage liver and kidneys and at high concentrations it is an animal carcinogen. Fourteen billion pounds of garbage, which is mostly plastic, is dumped into the ocean every year. Solid wastes sometimes wash- up also, and some oil spills have caused spectacular damage to valuable beach properties.

High CO2 concentration in water is also inimical to fish. We are in our sixties and in very good health—well, better health now that we drink about 2 liters plus of water each day. Water Pollution Water Pollution occurs when energy and other materials are released into the water, contaminating the quality of it for other users. Heavy metals from industrial processes can accumulate in nearby lakes and rivers. The ammonia nitrogen contained in sewage tends to increase the concentration of this constituent in the water.

Human life is very precious. Pollution of water affects both humans and aquatic life. Content Guidelines 2. DDE is relatively nontoxic to insects, but it seriously affects female birds. It leads to clogging of water filters and contamination of drinking water. In 1966, an identical case of mercury poisoning broke out in the town of Niigata in Central Japan. (iv) Effects of Pathogenic Micro-organisms: Micro-organisms (bacteria, viruses and protozoa) are naturally found m water and elsewhere in the environment and can cause infections. DDT is metabolized by detritivores along two pathways, under un-aerobic condition to TDE (also called DDD) and under aerobic condition to DDE, as shown below (Fig. c. Coxsackie and Echovirus diseases occur from water through ingestion. A water heavily contaminated with bacteria of either pollutional or native forms is unsuitable for cooling purposes and as process waters without sterilization and treatment because of slime formation.

Nitrite is absorbed into the blood where it combines with haemoglobin to form methaemoglobin. (iii) Effects of Hazardous Pollutants (Toxic Metals and Other Chemicals): As is the case with toxic air pollutants, there are many potentially toxic water pollutants. The worst harm is done when the non-target organism is a beneficial insect.

Decay consumes oxygen and desirable fish needing relatively high oxygen level either die out or go elsewhere. This human-generated nutrient input is derived from several sources, including domestic sewage, agricultural fertilizers, detergents, industrial wastes and livestock wastes. Small fish and small creature are the one who can’t handle the water pollution and dies due to that.

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