Know Your Environment. Protect Your Health.

Selenium

Huttig Waterworks

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
2018ND20ND
20193.86 ppb53ND - 7.30 ppb
20203.62 ppb53ND - 6.60 ppb
20215.21 ppb76ND - 7.90 ppb
20224.50 ppb97ND - 6.50 ppb
20233.33 ppb84ND - 7.40 ppb

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
2018-05-01Y181230005ND
2018-10-29Y183050003ND
2019-01-28Y190310042ND
2019-05-01Y1912200335.30 ppb
2019-09-03Y192490002ND
2019-10-15Y1929000236.70 ppb
2019-10-28Y1930500407.30 ppb
2020-02-24Y200580041ND
2020-06-16Y2017000525.40 ppb
2020-08-31Y2024700256.60 ppb
2020-09-07Y2025400396.10 ppb
2020-11-30Y203380011ND
2021-03-10Y2107000395.20 ppb
2021-05-19Y2114000226.10 ppb
2021-05-19Y2114000615.30 ppb
2021-08-30Y212450017ND
2021-09-13Y2125900126.30 ppb
2021-11-17Y2132300077.90 ppb
2021-11-17Y2132200145.70 ppb
2022-03-02Y2206200665.30 ppb
2022-03-28Y220900004ND
2022-05-23Y2214600565.10 ppb
2022-05-23Y2214600446.50 ppb
2022-07-26Y2220900196.30 ppb
2022-08-23Y2223700185.70 ppb
2022-08-23Y2223700196.50 ppb
2022-11-14Y2232100195.10 ppb
2022-11-14Y223210023ND
2023-02-14Y2304700676.10 ppb
2023-02-14Y2304700686.50 ppb
2023-05-30Y231520014ND
2023-05-30Y2315200236.60 ppb
2023-09-06Y232500071ND
2023-09-06Y2325000707.40 ppb
2023-10-24Y232990020ND
2023-10-24Y232990027ND