Know Your Environment. Protect Your Health.

Selenium

Concho Rural Water Pecan Creek

NOTE: Concho Rural Water Pecan Creek purchases water from City of San Angelo which is required to test for selenium. Sample information shown below was taken by City of San Angelo.

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: Concho Rural Water Pecan Creek purchases water from City of San Angelo which is required to test for selenium. Sample information shown below was taken by City of San Angelo.

Date Lab ID Result
2018-02-28Q1808687009ND
2019-05-07Q1920785005ND
2020-02-18Q2006105004ND
2021-04-27Q2110656004ND
2022-02-14Q2205298002ND
2023-02-15Q2306325002ND