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EWG's Tap Water Database — 2019 UPDATE

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Selenium

City of Garden Grove

Selenium is an essential element in diets. But too much selenium can decrease thyroid hormone production and cause hair loss, skin lesions and brittle fingernails.

 

30

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20121.63 ppb41ND - 6.50 ppb
2013ND40ND
2014ND80ND
2015ND40ND
2016N/A00N/A
2017ND100ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 30 ppb

The EWG Health Guideline of 30 ppb for selenium 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 hair loss and nail damage.

EPA Maximum Contaminant
Level (MCL) 50 ppb

The legal limit for selenium, established in 1991, was based on human epidemiological studies of populations exposed to naturally occurring selenium in drinking water. 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
2012-01-114417-020-09006.50 ppb
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