Know Your Environment. Protect Your Health.

Selenium

Quinlan North Subdivision

NOTE: Quinlan North Subdivision purchases water from Cash SUD which is required to test for selenium. Sample information shown below was taken by Cash SUD.

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.

 

6

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
2020ND10ND
2021ND10ND
2022ND10ND
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

NOTE: Quinlan North Subdivision purchases water from Cash SUD which is required to test for selenium. Sample information shown below was taken by Cash SUD.

Date Lab ID Result
2018-02-12Q1805646007ND
2019-02-21Q1907745002ND
2020-02-04Q2004530002ND
2021-07-13Q2118249005ND
2022-07-26Q2221173004ND
2023-10-24Q2345749002ND