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EWG's Tap Water Database — 2019 UPDATE

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Cobalt

Golden State Water Company (GSWC) - South Arcadia

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

 

18

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
2013ND90ND
2014ND90ND
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

Date Lab ID Result
2013-12-183L19003-07AND
2013-12-183L19003-17AND
2013-12-183L19003-15AND
2013-12-183L19003-11AND
2013-12-183L19003-13AND
2013-12-183L19003-03AND
2013-12-183L19003-05AND
2013-12-183L19003-09AND
2013-12-183L19003-01AND
2014-06-244F24039-05AND
2014-06-244F24039-09AND
2014-06-244F24039-01AND
2014-06-244F24039-03AND
2014-06-244F24039-13AND
2014-06-244F24039-15AND
2014-06-244F24039-17AND
2014-06-244F24039-11AND
2014-06-244F24039-07AND