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<title>Point source pollution</title>

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<span id="openzim-page-title" class="mw-page-title-main"><span class="mw-page-title-main">Point source pollution</span></span>

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</style><div role="note" class="hatnote navigation-not-searchable">For other uses, see <a href="Point_source_(disambiguation)" class="mw-disambig" title="Point source (disambiguation)">point source (disambiguation)</a>.</div>

<p>A <b>point source of pollution</b> is a single identifiable source of <a href="Air_pollution" title="Air pollution">air</a>, <a href="Water_pollution" title="Water pollution">water</a>, <a href="Thermal_pollution" title="Thermal pollution">thermal</a>, <a href="Noise_pollution" title="Noise pollution">noise</a> or <a href="Light_pollution" title="Light pollution">light</a> <a href="Pollution" title="Pollution">pollution</a>. A <a href="Point_source" title="Point source">point source</a> has negligible extent, distinguishing it from other pollution source geometrics (such as <a href="Nonpoint_source_pollution" title="Nonpoint source pollution">nonpoint source</a> or <a href="Area_source_(pollution)" class="mw-redirect" title="Area source (pollution)">area source</a>). The sources are called <i>point sources</i> because in mathematical modeling, they can be approximated as a mathematical <a href="Point_(geometry)" title="Point (geometry)">point</a> to simplify analysis.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> Pollution point sources are identical to other <a href="Physics" title="Physics">physics</a>, <a href="Engineering" title="Engineering">engineering</a>, <a href="Optics" title="Optics">optics</a>, and <a href="Chemistry" title="Chemistry">chemistry</a> point sources and include:

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<ul><li><a href="Air_pollution_dispersion_terminology" class="mw-redirect" title="Air pollution dispersion terminology">Air pollution</a> from an industrial source (rather than an airport or a road, considered a <a href="Line_source" title="Line source">line source</a>, or a forest fire, which is considered an area source, or <a href="Volume_source_(pollution)" title="Volume source (pollution)">volume source</a>)<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup></li>

<li><a href="Water_pollution" title="Water pollution">Water pollution</a> from factories, power plants, municipal <a href="Sewage_treatment" title="Sewage treatment">sewage treatment</a> plants and some farms (<i>see</i> <a href="Concentrated_animal_feeding_operation" title="Concentrated animal feeding operation">concentrated animal feeding operation</a>).<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> The U.S. <a href="Clean_Water_Act" title="Clean Water Act">Clean Water Act</a> also defines municipal separate <a href="Storm_sewer" class="mw-redirect" title="Storm sewer">storm sewer</a> systems and industrial <a href="Stormwater" title="Stormwater">stormwater</a> discharges (such as <a href="Construction_site" class="mw-redirect" title="Construction site">construction sites</a>) as point sources.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup>

<ul><li>Man-made, natural, and <a href="Groundwater" title="Groundwater">groundwater</a> reservoirs can all be contaminated by point source pollution which can threaten human health and safety.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup></li></ul></li>

<li><a href="Noise_pollution" title="Noise pollution">Noise pollution</a> from a <a href="Jet_engine" title="Jet engine">jet engine</a><sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup></li>

<li>Disruptive <a href="Seismic" class="mw-redirect" title="Seismic">seismic</a> vibration from a localized seismic study<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup></li>

<li><a href="Light_pollution" title="Light pollution">Light pollution</a> from an intrusive <a href="Street_light" title="Street light">street light</a><sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup></li>

<li><a href="Radio" title="Radio">Radio</a> emissions from an interference-producing electrical device</li></ul>

<ul><li><a href="Nonpoint_source_pollution" title="Nonpoint source pollution">Nonpoint source pollution</a></li>

<li><a href="United_States_regulation_of_point_source_water_pollution" title="United States regulation of point source water pollution">United States regulation of point source water pollution</a></li></ul>

<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>

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</style><cite id="CITEREFvan_Leeuwen2010" class="citation book cs1">van Leeuwen, C.J. (2010). <i>Risk Assessment of Chemicals: An Introduction, 2nd Ed</i>. Dordrecht, The Netherlands: Springer. <a href="ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <bdi>978-1-4020-6101-1</bdi>.</cite></span>

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<li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www3.epa.gov/airquality/emissns.html">"Air Pollution Emissions Overview"</a>. Washington, D.C.: U.S. Environmental Protection Agency. 2016-06-08.</cite></span>

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<li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><cite id="CITEREFHarrison2001" class="citation book cs1">Harrison, Roy M., ed. (2001). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=1kFbRYQUqcAC&pg=PA2"><i>Pollution: Causes, Effects and Control</i></a> (4th ed.). Cambridge, UK: Royal Society of Chemistry. p. 2. <a href="ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <bdi>0-85404-621-6</bdi>.</cite></span>

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<li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text">United States. Clean Water Act. Section 402(p), <a href="Title_33_of_the_United_States_Code" title="Title 33 of the United States Code">33 U.S.C.</a> <a rel="nofollow" class="external text" href="https://www.law.cornell.edu/uscode/text/33/1342(p)">§ 1342(p)</a>.</span>

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<li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://docs.shib.ncsu.edu/ds/ncsu/WAYF?entityID=https%3a%2f%2fprox.lib.ncsu.edu%2fezproxy%2fshibboleth&return=https%3a%2f%2flogin.prox.lib.ncsu.edu%2fShibboleth.sso%2fDS%3fSAMLDS%3d1%26target%3dezp.2aHR0cHM6Ly9saW5rLnNwcmluZ2VyLmNvbS8xMC4xMDA3Lzk3OC05ODEtMTAtMDY2OS0y">"Choose your library affiliation"</a>. <i>docs.shib.ncsu.edu</i>. <a href="Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1007%2F978-981-10-0669-2">10.1007/978-981-10-0669-2</a><span class="reference-accessdate">. Retrieved <span class="nowrap">2024-09-24</span></span>.</cite></span>

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<li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://blog.soton.ac.uk/soundwaves/wave-basics/point-sources-inverse-square-law/">"Point sources"</a>. <i>Sound Waves</i>. University of Southampton<span class="reference-accessdate">. Retrieved <span class="nowrap">2018-01-24</span></span>.</cite></span>

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<li id="cite_note-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-7">^</a></b></span> <span class="reference-text"><cite id="CITEREFBrüel_&_Kjær,_Nærum,_Denmark" class="citation web cs1">Brüel & Kjær, Nærum, Denmark. <a rel="nofollow" class="external text" href="http://www.nonoise.org/library/envnoise/#propagation">"Environmental Noise Propagation"</a>. <i>Noise Pollution Clearinghouse</i>. Montpelier, VT<span class="reference-accessdate">. Retrieved <span class="nowrap">2018-01-24</span></span>.</cite><span class="cs1-maint citation-comment"><code class="cs1-code">{{cite web}}</code>: CS1 maint: multiple names: authors list (link)</span></span>

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<li id="cite_note-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-8">^</a></b></span> <span class="reference-text"><cite id="CITEREFStähler,_SimonHosseini,_KasraZhang,_RanSigloch,_Karin2014" class="citation web cs1">Stähler, Simon; Hosseini, Kasra; Zhang, Ran; Sigloch, Karin (2014). <a rel="nofollow" class="external text" href="https://www.researchgate.net/publication/264785140">"Estimating the uncertainty of seismic point source solutions"</a>. Conference: EGU General Assembly 2014, held 27 April - 2 May, 2014 in Vienna, Austria, id.9911.</cite></span>

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<li id="cite_note-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-9">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.nps.gov/subjects/nightskies/sources.htm">"Light Pollution Sources"</a>. <i>Night Skies</i>. U.S. National Park Service<span class="reference-accessdate">. Retrieved <span class="nowrap">2018-01-24</span></span>.</cite></span>

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