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EWG's Tap Water Database — 2021 UPDATE

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Mercury (inorganic)

Irvine Ranch Water District

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

 

94

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND150ND
2015ND200ND
2016ND100ND
2017ND230ND
2018ND110ND
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
2014-01-144417-067-1010ND
2014-01-144417-066-0930ND
2014-02-114417-007-1215ND
2014-02-114417-056-1305ND
2014-02-264417-058-1020ND
2014-03-104417-055-0850ND
2014-03-114417-020-0930ND
2014-03-184417-014-0845ND
2014-03-254417-004-0845ND
2014-06-174417-018-0900ND
2014-07-174317-075-1332ND
2014-08-124317-060-1430ND
2014-08-274317-063-0817ND
2014-10-074417-078-1300ND
2014-10-234317-069-1305ND
2015-01-124417-078-1120ND
2015-01-274417-016-0930ND
2015-01-274417-003-1015ND
2015-02-094417-004-0940ND
2015-02-234417-019-0905ND
2015-03-114417-019-0845ND
2015-03-114417-019-0830ND
2015-03-184417-005-0950ND
2015-03-254417-009-1010ND
2015-04-074417-017-1000ND
2015-04-084417-078-1000ND
2015-04-234317-063-0835ND
2015-04-294417-011-0800ND
2015-05-204417-077-0750ND
2015-07-134417-077-1100ND
2015-07-144417-078-0900ND
2015-08-124317-060-1315ND
2015-08-194317-075-0948ND
2015-08-204417-010-0840ND
2015-10-054417-077-0930ND
2016-01-124417-077-1030ND
2016-01-284417-072-0925ND
2016-04-064417-006-0920ND
2016-05-314417-024-0835ND
2016-05-314417-023-0905ND
2016-06-154317-063-0945ND
2016-06-234417-008-0835ND
2016-07-264417-010-0900ND
2016-08-114317-060-1358ND
2016-09-224317-075-1129ND
2017-01-174417-016-0805ND
2017-01-174417-011-0835ND
2017-01-194417-058-0940ND
2017-01-194417-067-0830ND
2017-01-234417-014-1015ND
2017-01-234417-005-1055ND
2017-02-144417-020-1340ND
2017-02-144417-066-0925ND
2017-02-144417-004-0820ND
2017-02-284317-085-1334ND
2017-03-014417-020-0755ND
2017-03-144417-007-1010ND
2017-03-144417-056-1210ND
2017-03-214317-063-1418ND
2017-03-214317-064-1437ND
2017-03-234417-055-1000ND
2017-03-294317-069-1032ND
2017-03-304417-056-1340ND
2017-03-304417-055-1405ND
2017-04-264317-085-1040ND
2017-08-014417-018-0830ND
2017-11-144417-015-0925ND
2017-12-044417-009-0820ND
2018-02-064417-006-0800ND
2018-02-064417-017-0720ND
2018-02-084417-019-0840ND
2018-02-144317-085-1413ND
2018-02-204417-003-1220ND
2018-02-274317-069-1110ND
2018-03-054317-060-1433ND
2018-03-084317-075-1136ND
2018-03-204317-063-0820ND
2018-04-174317-085-1141ND
2018-04-304417-078-0925ND
2019-02-132706-060-1135ND
2019-02-214417-072-1030ND
2019-02-214417-077-0940ND
2019-02-272706-085-0941ND
2019-03-142706-063-0935ND
2019-03-142706-064-0943ND
2019-03-202706-075-1300ND
2019-04-154417-023-1310ND
2019-04-154417-017-1120ND
2019-04-154417-024-1230ND
2019-04-164417-008-0805ND
2019-05-234417-077-0950ND
2019-05-234417-077-0945ND
2019-06-274417-010-0745ND
2019-07-172706-085-1413ND