Selenium

Lake Bruin Water District #1

NOTE: Lake Bruin Water District #1 purchases water from Tensas Water District Association which is required to test for selenium. Sample information shown below was taken by Tensas Water District Association.

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.

MORE ABOUT THIS CONTAMINANT

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Range of results
2014	ND	2	ND
2015	ND	2	ND
2016	ND	2	ND
2017	ND	2	ND
2018	ND	2	ND
2019	ND	2	ND

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
2014-03-17	AD89837	ND
2014-03-17	AD89837	ND
2015-03-03	35177844004	ND
2015-03-03	35177844004	ND
2016-01-11	35224622005	ND
2016-01-11	35224622005	ND
2017-01-09	35288675004	ND
2017-01-09	35288675004	ND
2018-01-08	35367824002	ND
2018-01-08	35367824002	ND
2019-01-14	35442603003	ND
2019-01-14	35442603003	ND