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  2. Selenium - Wikipedia

    en.wikipedia.org/wiki/Selenium

    Selenium pollution of waterways also occurs when selenium is leached from coal flue ash, mining and metal smelting, crude oil processing, and landfill. [103] High selenium levels in waterways were found to cause congenital disorders in oviparous species, including wetland birds [ 104 ] and fish. [ 105 ]

  3. List of most-polluted rivers - Wikipedia

    en.wikipedia.org/wiki/List_of_most-polluted_rivers

    Suffered from significant industrial pollution called "foul and noisome, polluted by offal and industrious wastes, scummy with oil, unlikely to be mistaken for water." [ 220 ] Fish kills and submerged vehicles were a common sight, along with toxic chemical plumes that colored parts of the river pink and orange. [ 221 ]

  4. Wastewater quality indicators - Wikipedia

    en.wikipedia.org/wiki/Wastewater_quality_indicators

    Nonpoint source pollution can be contrasted with point source pollution, where discharges occur to a body of water at a single location. The nonpoint sources of phosphates include natural decomposition of rocks and minerals, stormwater runoff , agricultural pollution , erosion and sedimentation , atmospheric deposition , and direct input by ...

  5. US, Canada and indigenous groups announce proposal to ... - AOL

    www.aol.com/news/us-canada-indigenous-groups...

    The proposal would be executed through a century-old U.S.-Canada boundary waters treaty, establishing independent boards to study the pollution’s extent and make cleanup recommendations.

  6. The 'citizen scientists' testing Thames pollution

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  7. 2014 Dan River coal ash spill - Wikipedia

    en.wikipedia.org/wiki/2014_Dan_River_coal_ash_spill

    Immediate tests showed increased amounts of arsenic and selenium, [6] but the river was deemed by state officials to be a safe source for drinking water. However, further tests showed the ash to contain pollutants including but not limited to arsenic, copper, selenium, iron, zinc and lead. [1]

  8. Water quality - Wikipedia

    en.wikipedia.org/wiki/Water_quality

    The most common standards used to monitor and assess water quality convey the health of ecosystems, safety of human contact, extent of water pollution and condition of drinking water. Water quality has a significant impact on water supply and often determines supply options. [3]

  9. Water testing - Wikipedia

    en.wikipedia.org/wiki/Water_testing

    Water testing being conducted at a treatment facility in Broken Bow, Oklahoma. Water testing is a broad description for various procedures used to analyze water quality. Millions of water quality tests are carried out daily to fulfill regulatory requirements and to maintain safety. [1] Testing may be performed to evaluate:

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