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EWG's Tap Water Database — 2019 UPDATE

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Selenium

City of Sugar Land

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.

 

17

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
2013ND10ND
20142.37 ppb62ND - 7.80 ppb
2015ND20ND
2016ND10ND
20174.13 ppb64ND - 10.9 ppb

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
2012-08-23AB99485ND
2013-12-03AC36396ND
2014-02-11AC42154ND
2014-03-26AC48311ND
2014-03-26AC483237.80 ppb
2014-03-26AC483156.40 ppb
2014-03-26AC48310ND
2014-03-26AC48312ND
2015-01-22AC77304ND
2015-04-01AC86908ND
2016-02-02AD21386ND
2017-01-04AD62926ND
2017-03-22AD7626410.9 ppb
2017-03-22AD762676.10 ppb
2017-03-22AD76259ND
2017-03-22AD762633.10 ppb
2017-04-03AD779864.70 ppb