LYCOS RETRIEVER 
Pollution: Point Source Pollution
built 228 days ago
Water pollution is usually caused by human activities. Different human sources add to the pollution of water. There are two sorts of sources, point and nonpoint sources. Point sources discharge pollutants at specific locations through pipelines or sewers into the surface water. Nonpoint sources are sources that cannot be traced to a single site of discharge.
Source:
Water pollution occurs when a body of water is adversely affected due to the addition of large amounts of materials to the water. When it is unfit for its intended use, water is considered polluted. Two types of water pollutants exist; point source and nonpoint source. Point sources of pollution occur when harmful substances are emitted directly into a body of water. The Exxon Valdez oil spill best illustrates a point source water pollution.
Source:
Oil spills and dumping ... play a major role in point source pollution. Spilled grease, oil, and other hazardous substances from overturned trucks and leaking cars have a major impact by eventually running into rivers and sewers. Also, the disposal of used motor oil and grease affects the water by going into a storm sewer which can overflow into the river, or it will go directly into the river.
Source:
MORE ABOUT
Point Source Pollution