Know Your Environment. Protect Your Health.

Selenium

Cws - Lower Bodfish Water System

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.

 

41

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019N/A00N/A
2020ND70ND
2021N/A00N/A
20221.86 ppb1613ND - 5.70 ppb
20230.665 ppb179ND - 1.50 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
2018-03-13CA1510056_013_013-201803131215ND
2020-01-22CA1510056_008_008-202001221010ND
2020-01-22CA1510056_010_010-202001221021ND
2020-03-17CA1510056_013_013-202003171100ND
2020-03-23CA1510056_022_022-202003231058ND
2020-05-06CA1510056_013_013-202005061305ND
2020-06-08CA1510056_013_013-202006081214ND
2020-08-05CA1510056_013_013-202008051048ND
2022-03-14CA1510056_013_013-2022031410302.00 ppb
2022-04-06CA1510056_022_022-2022040609301.40 ppb
2022-04-06CA1510056_008_008-2022040610171.10 ppb
2022-04-06CA1510056_010_010-2022040610351.10 ppb
2022-04-19CA1510056_013_013-2022041910321.80 ppb
2022-05-10CA1510056_013_013-2022051011562.30 ppb
2022-06-06CA1510056_013_013-2022060611401.40 ppb
2022-07-06CA1510056_013_013-202207061315ND
2022-07-12CA1510056_008_008-2022071212435.00 ppb
2022-07-12CA1510056_022_022-2022071212255.70 ppb
2022-07-12CA1510056_010_010-2022071212504.20 ppb
2022-08-04CA1510056_013_013-2022080409021.70 ppb
2022-10-05CA1510056_010_010-202210050920ND
2022-10-05CA1510056_008_008-2022100509501.000 ppb
2022-10-05CA1510056_013_013-202210050858ND
2022-12-06CA1510056_013_013-2022120612081.10 ppb
2023-01-12CA1510056_008_008-202301121031ND
2023-01-12CA1510056_010_010-202301121051ND
2023-02-01CA1510056_013_013-2023020111301.20 ppb
2023-03-06CA1510056_013_013-2023030609211.20 ppb
2023-03-09CA1510056_013_013-202303091123ND
2023-04-10CA1510056_008_008-2023041009501.000 ppb
2023-04-10CA1510056_010_010-202304100955ND
2023-04-10CA1510056_013_013-202304100930ND
2023-05-04CA1510056_013_013-2023050412441.30 ppb
2023-06-06CA1510056_013_013-202306061106ND
2023-07-12CA1510056_013_013-2023071210551.000 ppb
2023-07-12CA1510056_010_010-202307121035ND
2023-08-09CA1510056_013_013-202308091216ND
2023-10-04CA1510056_008_008-2023100408551.40 ppb
2023-10-04CA1510056_010_010-2023100409001.50 ppb
2023-10-04CA1510056_013_013-2023100408351.40 ppb
2023-11-06CA1510056_013_013-2023110609381.30 ppb