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2. Drinking water quality standards - Wikipedia

   en.wikipedia.org/wiki/Drinking_water_quality...

   Drinking water quality standards describes the quality parameters set for drinking water. Water may contain many harmful constituents, yet there are no universally recognized and accepted international standards for drinking water. Even where standards do exist, the permitted concentration of individual constituents may vary by as much as ten ...

3. Toxic heavy metal - Wikipedia

   en.wikipedia.org/wiki/Toxic_heavy_metal

   The source of the contamination has been attributed to "corrosion in the lead and iron pipes that distribute water to city residents". [58] In 2015, the lead concentration of drinking water in north-eastern Tasmania, Australia, reached a level over 50 times the prescribed national drinking water guidelines. The source of the contamination was ...

4. Maximum contaminant level - Wikipedia

   en.wikipedia.org/wiki/Maximum_Contaminant_Level

   Maximum contaminant levels (MCLs) are standards that are set by the United States Environmental Protection Agency (EPA) for drinking water quality. [1] [2] An MCL is the legal threshold limit on the amount of a substance that is allowed in public water systems under the Safe Drinking Water Act (SDWA).

5. EDITORIAL: The acceptable level of 'forever chemicals' in ...

   www.aol.com/news/editorial-acceptable-level...

   Aug. 25—Drinking water at more than half a dozen Maine schools, from Greater Portland to the Midcoast, recently exceeded the state's limit for the toxic chemical compounds linked to cancers ...

6. Maximum acceptable toxicant concentration - Wikipedia

   en.wikipedia.org/wiki/Maximum_Acceptable...

   The maximum acceptable toxicant concentration (MATC) is a value that is calculated through aquatic toxicity tests to help set water quality regulations for the protection of aquatic life. Using the results of a partial life-cycle chronic toxicity test, the MATC is reported as the geometric mean between the No Observed Effect Concentration ...

7. Heavy metal element - Wikipedia

   en.wikipedia.org/wiki/Heavy_metal_(elements)

   An average 70 kg human body is about 0.01% heavy metals (~7 g, equivalent to the weight of two dried peas, with iron at 4 g, zinc at 2.5 g, and lead at 0.12 g comprising the three main constituents), 2% light metals (~1.4 kg, the weight of a bottle of wine) and nearly 98% nonmetals (mostly water).