Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Selenium

Palm Beach County Water Utilities

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND40ND
2013ND40ND
2014ND40ND
2015ND40ND
2016ND40ND
2017ND40ND

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 Result
2012-05-07ND
2012-05-09ND
2012-05-10ND
2012-05-14ND
2013-05-13ND
2013-05-16ND
2013-05-20ND
2013-05-22ND
2014-05-15ND
2014-05-20ND
2014-05-22ND
2014-05-29ND
2015-06-16ND
2015-06-16ND
2015-06-17ND
2015-06-22ND
2016-05-04ND
2016-05-11ND
2016-05-17ND
2016-05-24ND
2017-05-03ND
2017-05-10ND
2017-05-17ND
2017-05-30ND