Know Your Environment. Protect Your Health.

Selenium

Hawkins Water Co-cal Water Service (puc)

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.

 

46

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND60ND
2019N/A00N/A
2020ND30ND
2021N/A00N/A
20220.231 ppb163ND - 1.70 ppb
2023ND210ND

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
2018-02-08CA4900546_001_001-201802080925ND
2018-02-08CA4900546_003_003-201802080930ND
2018-03-14CA4900546_003_003-201803141250ND
2018-03-14CA4900546_001_001-201803141255ND
2018-04-12CA4900546_003_003-201804121115ND
2018-04-12CA4900546_001_001-201804121120ND
2020-07-20CA4900546_003_003-202007201215ND
2020-07-20CA4900546_001_001-202007201205ND
2020-08-18CA4900546_001_001-202008181240ND
2022-04-12CA4900546_001_001-202204120815ND
2022-04-12CA4900546_003_003-202204120810ND
2022-05-09CA4900546_003_003-2022050908001.000 ppb
2022-05-09CA4900546_001_001-202205090815ND
2022-06-13CA4900546_003_003-2022061308151.000 ppb
2022-06-13CA4900546_001_001-202206130810ND
2022-07-12CA4900546_003_003-202207120840ND
2022-07-12CA4900546_001_001-2022071208301.70 ppb
2022-08-09CA4900546_003_003-202208090820ND
2022-08-09CA4900546_001_001-202208090815ND
2022-10-05CA4900546_001_001-202210050815ND
2022-10-05CA4900546_003_003-202210050810ND
2022-11-16CA4900546_003_003-202211160830ND
2022-11-16CA4900546_001_001-202211160830ND
2022-12-13CA4900546_003_003-202212130825ND
2022-12-13CA4900546_001_001-202212130830ND
2023-01-12CA4900546_001_001-202301121400ND
2023-01-12CA4900546_003_003-202301121405ND
2023-02-14CA4900546_001_001-202302140830ND
2023-02-14CA4900546_003_003-202302140815ND
2023-03-16CA4900546_001_001-202303160755ND
2023-03-16CA4900546_003_003-202303160750ND
2023-04-10CA4900546_003_003-202304100740ND
2023-04-10CA4900546_001_001-202304100745ND
2023-05-16CA4900546_001_001-202305160810ND
2023-05-16CA4900546_003_003-202305160805ND
2023-06-15CA4900546_003_003-202306150755ND
2023-06-15CA4900546_001_001-202306150750ND
2023-07-16CA4900546_001_001-202307160810ND
2023-07-16CA4900546_003_003-202307160815ND
2023-08-29CA4900546_001_001-202308290810ND
2023-09-13CA4900546_001_001-202309130805ND
2023-09-13CA4900546_003_003-202309130810ND
2023-10-09CA4900546_001_001-202310090755ND
2023-10-09CA4900546_003_003-202310090750ND
2023-11-15CA4900546_001_001-202311151155ND
2023-11-15CA4900546_003_003-202311151200ND