Know Your Environment. Protect Your Health.

Selenium

Rancho Brazos Subdivision

NOTE: Rancho Brazos Subdivision purchases water from Acton MUD which is required to test for selenium. Sample information shown below was taken by Acton MUD.

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.

 

36

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND50ND
2019ND10ND
2020ND20ND
2021ND40ND
2022ND10ND
2023ND20ND

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: Rancho Brazos Subdivision purchases water from Acton MUD which is required to test for selenium. Sample information shown below was taken by Acton MUD.

Date Lab ID Result
2018-03-28Q1812936030ND
2018-03-28Q1812936029ND
2018-03-28Q1812936053ND
2018-03-28Q1812936032ND
2018-03-28Q1812936031ND
2019-01-10Q1901506005ND
2019-01-10Q1901506011ND
2019-03-26Q1912275052ND
2019-03-26Q1912275053ND
2019-03-26Q1912275054ND
2019-03-26Q1912275055ND
2019-03-26Q1912275056ND
2019-03-26Q1912275057ND
2019-03-26Q1912275058ND
2019-03-26Q1912275059ND
2019-03-26Q1912275060ND
2019-03-26Q1912275061ND
2020-03-04Q2008205037ND
2020-07-29Q2029640011ND
2021-04-01Q2108342039ND
2021-04-01Q2108342040ND
2021-04-01Q2108342038ND
2021-07-22Q2119289004ND
2022-01-27Q2202897001ND
2022-01-27Q2202897003ND
2022-01-27Q2202897005ND
2022-04-07Q2210873002ND
2022-04-07Q2210873004ND
2022-04-07Q2210873003ND
2022-04-07Q2210873001ND
2022-10-06Q2230209017ND
2022-10-06Q2230209018ND
2022-10-06Q2230209024ND
2022-10-06Q2230209032ND
2023-07-26Q2329862004ND
2023-11-14Q2348718021ND