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EWG's Tap Water Database — 2019 UPDATE

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Cobalt

California American Water Company - Coronado

NOTE: California American Water Company - Coronado purchases water from City of San Diego which is required to test for cobalt. Sample information shown below was taken by City of San Diego.

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

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013ND80ND
2014ND80ND
2015N/A00N/A
2016N/A00N/A
2017N/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

NOTE: California American Water Company - Coronado purchases water from City of San Diego which is required to test for cobalt. Sample information shown below was taken by City of San Diego.

Date Lab ID Result
2013-08-191308683-001AND
2013-08-191308684-001AND
2013-08-201308735-001AND
2013-08-201308736-001AND
2013-08-211308767-001AND
2013-08-211308768-001AND
2013-11-121311405-001AND
2013-11-121311402-001AND
2013-11-121311404-001AND
2013-11-121311403-001AND
2013-11-131311446-001AND
2013-11-131311448-001AND
2014-02-101402420-001AND
2014-02-101402419-001AND
2014-02-101402418-001AND
2014-02-101402421-001AND
2014-02-111402513-001AND
2014-02-111402514-001AND
2014-05-121405512-001AND
2014-05-121405511-001AND
2014-05-121405469-001AND
2014-05-121405468-001AND
2014-05-131405607-001AND
2014-05-131405606-001AND