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<br /> <br />, <br /> <br />Nonpoint Source Pollution <br />The objective of Section 319 is to improve water quality and restore impaired <br />~ uses in areas affected by nonpoint .source pollution. In order to insure <br />~ <br />~ consistency among the states, the Environmental Protection Agency has provided <br /> <br />the following definition of nonpoint source pollution: <br /> <br />Nonpoint Source (NPS) Pollution: NPS pollution is caused .by diffused sources <br /> <br />that are not regulated as point sources and normally is associated with <br /> <br />agricultural, silvicultural and urban runoff, runoff from construction <br /> <br />activities, etc. Such pollution results in the human-made or human-induced <br /> <br />alteration of the chemical, physical, biological, and radiological integrity <br /> <br />of water. In practical terms, nonpoint source pollution does not result from <br /> <br />a discharge at a specific, single location (such as a single pipe) but <br /> <br />generally results from land runoff, precipitation, atomospheric deposition, or <br /> <br />percolation. Pollution from nonpoint sources occurs when the rate at which <br /> <br />pollutant materials entering waterbodies or groundwater exceeds natural levels. <br /> <br />t <br />~ <br /> <br />In order to elassify types of nonpoint source pollution, E.P.A. has taken the <br /> <br />~ <br /> <br />~ <br /> <br />major categories of nonpoint sources and determined more specific <br /> <br />o <br /> <br />subcategories of each category. These categories and subcategories are <br /> <br />~ <br />2 <br /> <br />~ <br /> <br />further discussed and listed in Chapter II Nonpoint Source Assessment by <br /> <br />.~ <br /> <br />Basins. <br /> <br />:8 <br /> <br />t <br /> <br />~, <br /> <br />H <br /> <br />-32- <br /> <br />~ <br />& <br />