Selenium

Vinton

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.

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Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Range of results
2014	N/A	0	N/A
2015	ND	10	ND
2016	N/A	0	N/A
2017	N/A	0	N/A
2018	ND	10	ND
2019	N/A	0	N/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
2015-07-09	00281-REI CONSUL	ND
2015-07-09	00281-REI CONSUL	ND
2015-07-09	00281-REI CONSUL	ND
2015-07-09	00281-REI CONSUL	ND
2015-07-09	00281-REI CONSUL	ND
2015-07-09	00281-REI CONSUL	ND
2015-07-09	00281-REI CONSUL	ND
2015-07-09	00281-REI CONSUL	ND
2015-07-09	00281-REI CONSUL	ND
2015-07-09	00281-REI CONSUL	ND
2018-07-02	18070141-20A	ND
2018-07-02	18070141-18A	ND
2018-07-02	18070141-16A	ND
2018-07-02	18070141-14A	ND
2018-07-02	18070141-12A	ND
2018-07-02	18070141-10A	ND
2018-07-02	18070141-08A	ND
2018-07-02	18070141-06A	ND
2018-07-02	18070141-04A	ND
2018-07-02	18070141-02A	ND