Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Selenium

Garden City

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.

 

68

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.222 ppb91ND - 2.00 ppb
2015ND120ND
20160.258 ppb121ND - 3.10 ppb
2017ND100ND
2018ND110ND
2019ND140ND

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

Date Lab ID Result
2014-08-151408B39-005-PRIND
2014-08-151408B39-002-PRIND
2014-08-151408B39-004-PRIND
2014-08-151408B39-001-PRIND
2014-08-151408B39-003-PRI2.00 ppb
2014-08-181408C56-003-PRIND
2014-08-181408C56-001-PRIND
2014-08-181408C56-002-PRIND
2014-08-181408C56-004-PRIND
2015-08-051508347-001-PRIND
2015-08-051508347-003-PRIND
2015-08-051508347-005-PRIND
2015-08-051508347-002-PRIND
2015-08-051508347-004-PRIND
2015-08-061508491-002-PRIND
2015-08-061508491-004-PRIND
2015-08-061508491-007-PRIND
2015-08-061508491-001-PRIND
2015-08-071508632-001-PRIND
2015-08-071508632-002-PRIND
2015-10-281510L96-003-PRIND
2016-07-061607432-001-PRIND
2016-08-171608H35-002-PRIND
2016-08-171608H35-001-PRIND
2016-09-091609665-001-PRIND
2016-09-091609665-002-PRIND
2016-09-121609776-002-PRIND
2016-09-141609B78-003-PRI3.10 ppb
2016-09-141609B78-002-PRIND
2016-09-211609I88-001-PRIND
2016-09-211609I88-003-PRIND
2016-09-231609L06-003-PRIND
2016-09-231609L06-001-PRIND
2017-10-047031903003ND
2017-10-047031902006ND
2017-10-047031903004ND
2017-10-047031903005ND
2017-10-137032857001-PRIND
2017-10-137032857002-PRIND
2017-10-137032857003-PRIND
2017-10-267034156001-PRIND
2017-10-267034156002-PRIND
2017-12-227038915001-PRIND
2018-06-057053755003-PRIND
2018-09-127064528001-PRIND
2018-09-127064528002ND
2018-09-147064896003-PRIND
2018-09-147064896001ND
2018-10-117067661001-PRIND
2018-10-117067661002-PRIND
2018-10-157067953002ND
2018-10-157067953001-PRIND
2018-10-247068920001-PRIND
2018-11-217071820006ND
2019-05-097088902003-PRIND
2019-05-097088902001-PRIND
2019-08-0770100284003-PRIND
2019-08-0770100284001-PRIND
2019-08-0870100531004-PRIND
2019-08-0870100531002-PRIND
2019-08-0870100531001-PRIND
2019-08-0870100531003-PRIND
2019-08-0970100701003-PRIND
2019-08-0970100701001-PRIND
2019-08-1970101923002-PRIND
2019-08-1970101923001-PRIND
2019-08-2170102243002-PRIND
2019-08-2170102243001-PRIND