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EWG's Tap Water Database — 2021 UPDATE

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Cobalt

California American Water Company - Monterey

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

MORE ABOUT THIS CONTAMINANT

 

46

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND140ND
2014ND260ND
2015ND60ND
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
2013-09-0923390901ND
2013-09-1123387101ND
2013-09-1123386801ND
2013-09-1123391101ND
2013-09-1123387701ND
2013-09-1123387601ND
2013-09-1123389701ND
2013-09-1123386401ND
2013-10-0723388801ND
2013-10-0823387001ND
2013-10-3023389101ND
2013-10-3123387801ND
2013-12-1624208001ND
2013-12-1724206801ND
2014-03-1024995901ND
2014-03-1024994001ND
2014-03-1024993901ND
2014-03-1024998501ND
2014-03-1125000001ND
2014-03-1124992101ND
2014-03-1124999601ND
2014-03-1124994401ND
2014-03-1224993701ND
2014-03-2424994201ND
2014-04-0924999801ND
2014-04-0924994101ND
2014-05-0525000201ND
2014-05-0525000401ND
2014-05-0524994801ND
2014-05-0924994601ND
2014-05-0924993801ND
2014-05-0924994501ND
2014-06-1825824401ND
2014-06-2425823001ND
2014-12-1626925201ND
2014-12-1628049401ND
2014-12-1626924901ND
2014-12-1626925101ND
2014-12-1828109801ND
2014-12-1826925401ND
2015-05-0429260201ND
2015-05-0429260101ND
2015-06-1827426301ND
2015-06-1827426501ND
2015-07-2329998601ND
2015-07-2329998701ND