Know Your Environment. Protect Your Health.

Selenium

Waysons Mobile Court

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.

 

8

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019N/A00N/A
2020ND30ND
20211.10 ppb111.10 ppb
2022ND20ND
20231.10 ppb111.10 ppb

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
2018-12-05EC_1812_02ND
2020-04-28E20003449002ND
2020-04-28E20003449003ND
2020-11-17EC_2011-02ND
2021-06-17EC82711.10 ppb
2022-02-01E2200114402ND
2022-02-01E2200114403ND
2023-06-22EC95111.10 ppb