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EWG's Tap Water Database — 2021 UPDATE

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Mercury (inorganic)

Suez

Mercury is a potent neurotoxin that also damages the kidneys and other internal organs. Mercury enters drinking water from industrial pollution, mining wastes and coal-fired power plants.

MORE ABOUT THIS CONTAMINANT

 

70

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND70ND
2015ND60ND
2016ND90ND
2017ND180ND
2018ND150ND
2019ND150ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 1.2 ppb

The EWG Health Guideline of 1.2 ppb for mercury (inorganic) was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against harm to internal organs.

EPA Maximum Contaminant
Level (MCL) 2 ppb

The legal limit for inorganic mercury, established in 1991, was based on toxicity studies conducted in laboratory animals in the 1970s and 1980s. This limit does not include any additional consideration of children’s health.

ppb = parts per billion

All test results

Date Lab ID Result
2014-06-09I1420772ND
2014-06-10I1421074ND
2014-06-10I1421075ND
2014-06-17I1422330ND
2014-06-17I1422335ND
2014-07-30I1429112ND
2014-07-30I1429113ND
2015-03-09I1508865ND
2015-05-27I1520479ND
2015-06-04I1521779ND
2015-06-16I1523455ND
2015-06-24I1525301ND
2015-07-24I1530230ND
2016-06-23I1627647ND
2016-06-24I1627839ND
2016-06-24I1627840ND
2016-06-27I1628127ND
2016-06-27I1628124ND
2016-06-27I1628125ND
2016-06-28I1628441ND
2016-06-28I1628440ND
2016-06-29I1628657ND
2017-03-13I1709901ND
2017-03-14I1710140ND
2017-03-14I1710137ND
2017-03-14I1710137ND
2017-05-30I1722574ND
2017-05-31I1722763ND
2017-05-31I1722759ND
2017-05-31I1722753ND
2017-06-19I1726109ND
2017-06-19I1726107ND
2017-06-21I1726771ND
2017-07-20I1732215ND
2017-07-25I1732813ND
2017-07-25I1732811ND
2017-08-03I1734565ND
2017-08-03I1734567ND
2017-08-14I1736476ND
2017-08-17I1737329ND
2018-02-05I1804986ND
2018-02-06I1805280ND
2018-02-12I1806151ND
2018-05-15I1821851ND
2018-05-15I1821863ND
2018-06-06I1825581ND
2018-06-06I1825583ND
2018-06-21I1828608ND
2018-06-21I1828606ND
2018-06-21I1828603ND
2018-06-21I1828604ND
2018-06-26I1829341ND
2018-06-26I1829342ND
2018-06-26I1829345ND
2018-07-02I1830578ND
2019-02-19I1907386ND
2019-02-19I1907388ND
2019-03-06I1909868ND
2019-03-06I1909865ND
2019-04-17I1917321ND
2019-06-12I1927972ND
2019-06-20I1929654ND
2019-07-03I1932118ND
2019-07-10I1933345ND
2019-07-10I1933346ND
2019-07-19I1935266ND
2019-07-19I1935267ND
2019-08-28I1942930ND
2019-08-28I1942932ND
2019-09-05I1944523ND