Know Your Environment. Protect Your Health.

Selenium

Tall Oaks Mobile Home Park

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.

 

25

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.65 ppb41ND - 6.60 ppb
20193.14 ppb52ND - 8.30 ppb
20203.60 ppb41ND - 14.4 ppb
20211.55 ppb41ND - 6.20 ppb
2022ND40ND
2023ND40ND

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
2018-02-21Y180530092ND
2018-05-15Y181370026ND
2018-08-14Y1822800426.60 ppb
2018-11-14Y183190028ND
2019-02-19Y190520001ND
2019-05-28Y191530073ND
2019-08-13Y1922700587.40 ppb
2019-11-05Y1931100418.30 ppb
2019-12-30Y193650001ND
2020-02-12Y200440032ND
2020-04-13Y201080023ND
2020-08-24Y20240007114.4 ppb
2020-11-18Y203240043ND
2021-02-22Y210560019ND
2021-05-18Y211390009ND
2021-08-24Y212380070ND
2021-10-06Y2128000286.20 ppb
2022-01-05Y220060012ND
2022-05-17Y221390050ND
2022-08-09Y222230054ND
2022-10-18Y222930044ND
2023-01-23Y230260034ND
2023-05-16Y231380050ND
2023-08-29Y232430035ND
2023-10-17Y232920030ND