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EWG's Tap Water Database — 2021 UPDATE

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Cobalt

Golden State Water Company - Cordova

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

 

23

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND200ND
2014ND30ND
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
2013-06-18201306190225AMND
2013-06-18201306190231AMND
2013-06-18201306190220AMND
2013-06-18201306190209AMND
2013-06-18201306190214AMND
2013-06-18201306190218AMND
2013-06-18201306190229AMND
2013-06-18201306190211AMND
2013-06-18201306190216AMND
2013-09-17201309180511AMND
2013-09-17201309180488AMND
2013-09-17201309180507AMND
2013-12-10201312110724AMND
2013-12-10201312110709AMND
2013-12-10201312110877AMND
2013-12-10201312110691AMND
2013-12-10201312110707AMND
2013-12-10201312110875AMND
2013-12-10201312110722AMND
2013-12-10201312110705AMND
2014-03-25201403260291AMND
2014-03-25201403260334AMND
2014-03-25201403260381AMND