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  2. Water pollution - Wikipedia

    en.wikipedia.org/wiki/Water_pollution

    Nutrient pollution caused by Surface runoff of soil and fertilizer during a rain storm Nutrient pollution, a form of water pollution, refers to contamination by excessive inputs of nutrients. It is a primary cause of eutrophication of surface waters (lakes, rivers and coastal waters ), in which excess nutrients, usually nitrogen or phosphorus ...

  3. Water pollution in the United States - Wikipedia

    en.wikipedia.org/wiki/Water_pollution_in_the...

    Topsoil runoff from farm, central Iowa (2011). Water pollution in the United States is a growing problem that became critical in the 19th century with the development of mechanized agriculture, mining, and manufacturing industries—although laws and regulations introduced in the late 20th century have improved water quality in many water bodies. [1]

  4. United States regulation of point source water pollution

    en.wikipedia.org/wiki/United_States_regulation...

    Water pollution is the contamination of natural water bodies by chemical, physical, radioactive or pathogenic microbial substances. [2] Point sources of water pollution are described by the CWA as "any discernible, confined, and discrete conveyance from which pollutants are or may be discharged."

  5. List of most-polluted rivers - Wikipedia

    en.wikipedia.org/wiki/List_of_most-polluted_rivers

    Main article: Pollution of the Ganges: Ghadir River: Southern Beirut region, Lebanon [41] About 120,000 inhabitants in the Hayy El-Sellom neighborhood. [42] The most polluted river in Lebanon, described in 2017 by Lebanese minister of public works Youssef Fenianos as no longer normal water, but sewage water. [43] Industrial zones by the river. [43]

  6. Pollution - Wikipedia

    en.wikipedia.org/wiki/Pollution

    Pollution is the introduction of contaminants into the natural environment that cause harm. [1] Pollution can take the form of any substance (solid, liquid, or gas) or energy (such as radioactivity, heat, sound, or light). Pollutants, the components of pollution, can be either foreign substances/energies or naturally occurring contaminants.

  7. Conventional pollutant - Wikipedia

    en.wikipedia.org/wiki/Conventional_pollutant

    A conventional pollutant is a term used in the USA to describe a water pollutant that is amenable to treatment by a municipal sewage treatment plant. A basic list of conventional pollutants is defined in the U.S. Clean Water Act. [1] The list has been amended in regulations issued by the Environmental Protection Agency: biochemical oxygen ...

  8. Groundwater pollution - Wikipedia

    en.wikipedia.org/wiki/Groundwater_pollution

    Groundwater pollution (also called groundwater contamination) occurs when pollutants are released to the ground and make their way into groundwater.This type of water pollution can also occur naturally due to the presence of a minor and unwanted constituent, contaminant, or impurity in the groundwater, in which case it is more likely referred to as contamination rather than pollution.

  9. Water quality law - Wikipedia

    en.wikipedia.org/wiki/Water_quality_law

    Water quality laws govern the protection of water resources for human health and the environment. Water quality laws are legal standards or requirements governing water quality, that is, the concentrations of water pollutants in some regulated volume of water. Such standards are generally expressed as levels of a specific water pollutants ...

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