Nonpoint source

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Term Nonpoint source
Description A contributing factor to water pollution that cannot be traced to a specific spot; like agricultural fertilizer runoff, sediment from construction.
Definition Nonpoint source

A contributing factor to water pollution that cannot be traced to a specific spot; like agricultural fertilizer runoff, sediment from construction.   Diffuse pollution sources (i.e. without a single point of origin or not introduced into a receiving stream from a specific outlet). The pollutants are generally carried off the land by storm water. Common non-point sources are agriculture, forestry, urban, mining, construction, dams, channels, land disposal, saltwater intrusion, and city streets.

References http://rais.ornl.gov/home/glossary.html#N

http://www.epa.gov/OCEPAterms/nterms.html http://sra.org/resources_glossary_m-o.php http://www.epa.gov/oswer/riskassessment/glossary.htm#n Additional Information

The term non-point source is used to identify sources of pollution that are diffuse and do not have a point of origin or that are not introduced into a receiving stream from a specific outlet. Common non-point sources are rain water, runoff from agricultural lands, industrial sites, parking lots, and timber operations, as well as escaping gases from pipes and fittings.  

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