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EWG's Tap Water Database — 2019 UPDATE

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Cobalt

East Rio Hondo WSC

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

 

9

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
2013ND70ND
2014ND20ND
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
2013-09-30Q1308427005ND
2013-09-30Q1308427009ND
2013-09-30Q1308427001ND
2013-09-30Q1308427013ND
2013-09-30Q1308427015ND
2013-12-19Q1319042001ND
2013-12-19Q1319042005ND
2014-09-09Q1442416003ND
2014-09-09Q1442416001ND