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EWG's Tap Water Database — 2021 UPDATE

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Selenium

Greenville Utilities Comm.

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.

 

29

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND50ND
2015ND50ND
2016ND50ND
2017ND50ND
2018ND50ND
2019ND40ND

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
2014-10-0737729_14-30541ND
2014-10-0737729_14-30542ND
2014-10-0737729_14-30543ND
2014-10-0737729_14-30544ND
2014-10-0737729_14-30540ND
2015-10-12ND
2015-10-12ND
2015-10-12ND
2015-10-12ND
2015-10-13ND
2016-10-2037729_16-36810ND
2016-10-2037729_16-36809ND
2016-10-2037729_16-36805ND
2016-10-2037729_16-36811ND
2016-10-2037729_16-36807ND
2017-10-1937729_17-39424ND
2017-10-1937729_17-39426ND
2017-10-1937729_17-39428ND
2017-10-1937729_17-39429ND
2017-10-1937729_17-39430ND
2018-10-1837729_18-43628 ND
2018-10-1837729_18-43627 ND
2018-10-1837729_18-43626 ND
2018-10-1837729_18-43623 ND
2018-10-1837729_18-43620 ND
2019-10-2437729_19-46056 ND
2019-10-2437729_19-46055 ND
2019-10-2437729_19-46054 ND
2019-10-2437729_19-46053 ND