Know Your Environment. Protect Your Health.

Selenium

Barton Dade Cedar & Jasper Counties Consolidated Public Water Supply District 1

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.

 

19

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019ND90ND
2020N/A00N/A
2021N/A00N/A
2022ND100ND
2023N/A00N/A

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2019-05-20AD47546ND
2019-05-20AD47547ND
2019-05-20AD47548ND
2019-05-20AD47549ND
2019-05-20AD47550ND
2019-05-20AD47551ND
2019-05-20AD47552ND
2019-05-20AD47553ND
2019-05-20AD47545ND
2022-05-172211797ND
2022-05-172211800ND
2022-05-172211795ND
2022-05-172211796ND
2022-05-172211801ND
2022-05-172211802ND
2022-05-172211803ND
2022-05-172211799ND
2022-05-172211798ND
2022-11-112219082ND