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EWG's Tap Water Database — 2021 UPDATE

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Cobalt

Golden State Water Company - Bay Point

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

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND60ND
2014ND60ND
2015N/A00N/A
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
2013-08-20201308210393AMND
2013-08-20201308210418AMND
2013-08-20201308210416AMND
2013-08-20201308210386AMND
2013-11-19201311200379AMND
2013-11-19201311200377AMND
2014-02-25201402260669AMND
2014-02-25201402260744AMND
2014-02-25201402280423AMND
2014-02-25201402260689AMND
2014-05-13201405140418AMND
2014-05-13201405140467AMND