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EWG's Tap Water Database — 2019 UPDATE

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Mercury (inorganic)

City of Garden Grove

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.

 

30

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND40ND
2013ND40ND
2014ND80ND
2015ND40ND
2016N/A00N/A
2017ND100ND

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
2012-01-114417-061-0940ND
2012-01-114417-020-0900ND
2012-04-044417-018-1105ND
2012-04-044417-016-1135ND
2013-04-034417-016-1145ND
2013-04-034417-061-0935ND
2013-04-034417-018-1100ND
2013-04-034417-020-0715ND
2014-01-084417-019-0810ND
2014-01-084417-014-0740ND
2014-01-084417-012-0955ND
2014-01-084417-011-1100ND
2014-01-084417-009-0835ND
2014-04-024417-006-1400ND
2014-04-024417-039-1015ND
2014-04-024417-013-1440ND
2015-03-044417-061-0835ND
2015-03-044417-020-0700ND
2015-04-014417-018-1100ND
2015-04-014417-016-1140ND
2017-02-014417-012-0915ND
2017-02-014417-014-0935ND
2017-02-014417-009-0820ND
2017-02-014417-019-0715ND
2017-03-014417-018-1050ND
2017-03-014417-011-1020ND
2017-04-264417-013-1200ND
2017-04-264417-011-1020ND
2017-04-264417-039-0955ND
2017-04-264417-016-1120ND