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EWG's Tap Water Database — 2019 UPDATE

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Selenium

City of Auburn

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.

 

39

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND60ND
2013ND60ND
2014ND60ND
2015ND50ND
2016ND60ND
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
2012-07-1843812ND
2012-07-1843813ND
2012-07-1843814ND
2012-07-1843815ND
2012-07-1843816ND
2012-07-1843811ND
2013-07-0248395ND
2013-07-0248394ND
2013-07-0248393ND
2013-07-0248392ND
2013-07-0248391ND
2013-10-0850045ND
2014-08-2653706ND
2014-08-2653707ND
2014-08-2653708ND
2014-08-2653709ND
2014-08-2653722ND
2014-08-2653723ND
2015-08-1958150ND
2015-08-1958148ND
2015-08-1958153ND
2015-08-1958151ND
2015-08-1958149ND
2016-08-03ND
2016-08-03ND
2016-08-03ND
2016-08-03ND
2016-08-03ND
2016-08-17ND
2017-08-16ND
2017-08-16ND
2017-08-16ND
2017-08-16ND
2017-08-16ND
2017-08-16ND
2017-08-16ND
2017-08-16ND
2017-11-28ND
2017-12-05ND