Know Your Environment. Protect Your Health.

Selenium

Myoma Dunes Mutual Water Company

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.

 

15

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND20ND
2020ND10ND
2021ND20ND
2022ND70ND
2023ND10ND

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
2018-11-19CA3310051_007_007-201811191011ND
2018-11-19CA3310051_008_008-201811191033ND
2019-11-18CA3310051_011_011-201911180951ND
2019-11-22CA3310051_010_010-201911220939ND
2020-08-24CA3310051_009_009-202008241030ND
2021-08-23CA3310051_007_007-202108230903ND
2021-08-23CA3310051_008_008-202108230835ND
2022-08-19CA3310051_008_008-202208190935ND
2022-08-19CA3310051_011_011-202208190700ND
2022-08-19CA3310051_010_010-202208190749ND
2022-08-19CA3310051_011_011-202208190752ND
2022-08-19CA3310051_009_009-202208190919ND
2022-08-19CA3310051_007_007-202208190903ND
2022-08-19CA3310051_010_010-202208190715ND
2023-08-22CA3310051_009_009-202308220650ND