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EWG's Tap Water Database — 2019 UPDATE

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Selenium

El Paso Water Company

NOTE: El Paso Water Company purchases water from City of Wichita which is required to test for selenium. Sample information shown below was taken by City of Wichita.

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.

 

6

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20123.80 ppb113.80 ppb
20133.50 ppb113.50 ppb
20141.90 ppb111.90 ppb
20152.20 ppb112.20 ppb
20163.10 ppb113.10 ppb
20172.00 ppb112.00 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

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

NOTE: El Paso Water Company purchases water from City of Wichita which is required to test for selenium. Sample information shown below was taken by City of Wichita.

Date Lab ID Result
2012-05-22579209WS3.80 ppb
2013-05-21596422WS3.50 ppb
2014-05-121126591.90 ppb
2015-05-113310112.20 ppb
2016-05-105442323.10 ppb
2017-05-177628332.00 ppb