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EWG's Tap Water Database — 2021 UPDATE

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Cobalt

Pomona Water Department

Cobalt is a metal found throughout the environment; people may be exposed to cobalt in air, food and drinking water.

MORE ABOUT THIS CONTAMINANT

 

40

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND300ND
2014ND80ND
2015ND20ND
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/A00N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 70 ppb

The EWG Health Guideline of 70 ppb for cobalt was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. This health guideline protects against change in blood chemistry.

ppb = parts per billion

All test results

Date Lab ID Result
2013-05-08201305080592AMND
2013-05-08201305080604AMND
2013-05-08201305080602AMND
2013-05-08201305080594AMND
2013-05-08201305080606AMND
2013-05-08201305080600AMND
2013-05-08201305080598AMND
2013-05-08201305080596AMND
2013-05-08201305080586AMND
2013-05-08201305080588AMND
2013-05-08201305080590AMND
2013-05-08201305080584AMND
2013-08-08201308080480AMND
2013-08-08201308080478AMND
2013-08-08201308080470AMND
2013-08-08201308080472AMND
2013-08-08201308080476AMND
2013-08-08201308080474AMND
2013-10-02201310020266AMND
2013-10-02201310020264AMND
2013-11-05201311050734AMND
2013-11-05201311050738AMND
2013-11-05201311050740AMND
2013-11-05201311050732AMND
2013-11-05201311050742AMND
2013-11-05201311050744AMND
2013-11-05201311050746AMND
2013-11-05201311050728AMND
2013-11-05201311050730AMND
2013-11-05201311050736AMND
2014-02-04201402040632AMND
2014-02-04201402040630AMND
2014-02-04201402040634AMND
2014-02-04201402040640AMND
2014-02-04201402040638AMND
2014-02-04201402040636AMND
2014-09-16201409170324AMND
2014-09-16201409170326AMND
2015-03-17201503170763AMND
2015-03-17201503170765AMND