Know Your Environment. Protect Your Health.

Selenium

Yuima Municipal Water District Ida

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.

 

23

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20187.60 ppb117.60 ppb
20191.40 ppb71ND - 9.80 ppb
20202.70 ppb21ND - 5.40 ppb
20216.20 ppb116.20 ppb
20221.94 ppb93ND - 6.30 ppb
2023ND30ND

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
2018-07-10CA3700938_004_004-2018071011057.60 ppb
2019-03-12CA3700938_048_048-2019031210459.80 ppb
2019-06-11CA3700938_005_005-201906111200ND
2019-07-09CA3700938_031_031-201907090730ND
2019-07-09CA3700938_006_006-201907090800ND
2019-07-09CA3700938_047_047-201907091130ND
2019-07-09CA3700938_012_012-201907090845ND
2019-10-08CA3700938_011_011-201910080820ND
2020-06-09CA3700938_037_037-2020060907205.40 ppb
2020-07-14CA3700938_020_020-202007141200ND
2021-07-13CA3700938_004_004-2021071308456.20 ppb
2022-03-09CA3700938_048_048-2022030913206.30 ppb
2022-07-05CA3700938_047_047-2022070513105.70 ppb
2022-07-12CA3700938_012_012-202207121330ND
2022-10-12CA3700938_011_011-202210121000ND
2022-10-25CA3700938_031_031-202210251130ND
2022-10-25CA3700938_012_012-202210251100ND
2022-10-25CA3700938_005_005-202210251145ND
2022-11-01CA3700938_006_006-202211011400ND
2022-12-20CA3700938_047_047-2022122013305.50 ppb
2023-01-09CA3700938_006_006-202301091230ND
2023-06-05CA3700938_037_037-202306050930ND
2023-07-11CA3700938_020_020-202307110750ND