The effect of water pollution depends on the type and amount of contamination, the time of exposure, and what the water was like before the pollution. The first federal law concerning pollution was the 1899 rivers and harbor act, the 1965 water quality act, the 1966 clean water restoration act, and the 1987 clean water act. The mississippi river is on of the latest examples in the campaign to clean up the nation x27 s water. In some extreme cases, rivers, lakes, and wells have been known to ignite.air pollution is also a worldwide polluter. Oil spills near anchorage alaska caused over 3,0 otters to die 36,0 different kinds of seabirds were killed and over 100 eagles.eventually water pollution will cause there to be no life in the ocean, lakes, and rivers. Water pollutionwater pollution has been an increasing problem over the last few years.

Pollution itself is when a substance or energy is introduced into the soil, air, or water in a concentrate. The hudson river and pcb pollution the hudson river and pcb pollution the hudson river is a body of water that stretches for 315 miles from the adirondack mountains to the battery in manhattan, reaching its deepest point of 216 feet in the highlands near constitution island and west point and reaches its widest point of 3 miles across at havestraw. Although conservation efforts continued into the 20th century, there was no progress to protect the hudson river and its banks from industrial pollution. There are pcbs in hudson river water, biota, and sediment from hudson falls to new york.

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The pollution of river water is caused by the dumping of untreated sewage and industrial wastes into it. For example, the river ganga which flows for over 2500 kilometres from gangotri in the himalayas to ganga sagar in the bay of bengal is being turned into a dirty water drain by the discharge of untreated sewage and industrial wastes emanating from more than a hundred towns and cities which lie along its way. In addition to sewage and industrial wastes, the pollution of river ganga is also caused by other human activities like bathing, washing of clothes, immersion of ashes of the dead and dumping of unburnt corpses in its water.

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The toxicity of these chemical effluents kills the fish in many parts of the river. The contamination of river water can be usually found from two factors: i the presence of coliform bacteria in river water, and ii measurement of ph of river water. The presence of coliform in the river water indicates its contamination by disease causing micro organisms. This is because though coliform itself is harmless but its presence in river water indicates that other, more harmful, intestinal bacteria might also be present. If the ph of river water is found to be below 7, then the river water will be acidic and hence polluted.

A multicrore 'ganga action plan' gap project was launched in 1985 to clean the river ganga and make its water pollution free. Some of the rainwater which falls on earth seeps through the soil and goes down under the surface of the earth. The deep tube wells called 'bore wells' are also dug into the earth which are much deeper than the ordinary wells and their water is drawn out by using water pumps. When too much water is pumped out through deep tube wells then the water table level of water below the earth's surface gets lowered too much. This lowering of water table decreases the amount of available underground water.

In order to maintain the water table at a proper depth, it is necessary to ensure better percolation of rainwater into the soil. A scheme called 'rainwater harvesting' is recommended to stop flowing rainwater and make it percolate into the soil more efficiently. According to a report of the national environment engineering research institute neeri all the fourteen big rivers of india are badly polluted. River jamuna in delhi receives 60 kg of dissolved solids, 30 kg of heavy metals and 200 kg of detergent every day. In its 48 km stretch around delhi yamuna gets polluted through 17 drains that bring toxics, acids and a number of chemicals that affect the health of the river and consequently of all those who depend on it for drinking and bathing water. The flow of toxic effluents including chemicals, metallurgic deposits and fertilizers to river periyar in kerala is so great that the people living on its banks have a high incidence of skin diseases.