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EWG's Tap Water Database — 2021 UPDATE

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Selenium

City of Denham Springs Water System

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.

 

28

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
2014ND140ND
2015ND20ND
2016N/A00N/A
2017ND100ND
2018ND20ND
2019N/A00N/A

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
2014-06-17AD92277ND
2014-06-17AD92267ND
2014-06-17AD92262ND
2014-06-17AD92272ND
2014-06-17AD92277ND
2014-06-17AD92282ND
2014-06-17AD92272ND
2014-06-17AD92267ND
2014-06-17AD92262ND
2014-06-17AD92282ND
2014-06-24AD92607ND
2014-06-24AD92607ND
2014-12-08AE00288ND
2014-12-08AE00288ND
2015-09-1635207899001ND
2015-09-1635207899001ND
2017-07-17AE15708ND
2017-07-17AE15704ND
2017-07-17AE15696ND
2017-07-17AE15692ND
2017-07-17AE15696ND
2017-07-17AE15704ND
2017-07-17AE15708ND
2017-07-17AE15692ND
2017-09-25AE18611ND
2017-09-25AE18611ND
2018-01-31AE20522ND
2018-01-31AE20522ND