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EWG's Tap Water Database — 2019 UPDATE

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Cobalt

City of El Mirage

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

 

35

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
2013N/A00N/A
2014ND180ND
2015ND170ND
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
2014-08-223090504ND
2014-08-223090395ND
2014-08-223090410ND
2014-08-223090480ND
2014-08-223090419ND
2014-08-223090471ND
2014-08-223090484ND
2014-08-223090508ND
2014-08-223090488ND
2014-08-223090512ND
2014-08-223090492ND
2014-08-223090385ND
2014-08-223090439ND
2014-08-223090496ND
2014-09-233112267ND
2014-09-233112252ND
2014-09-253112279ND
2014-11-073136321ND
2015-02-233193178ND
2015-02-233193468ND
2015-02-233193187ND
2015-02-233193223ND
2015-02-233193531ND
2015-02-233193511ND
2015-02-233193198ND
2015-02-233193203ND
2015-02-233193491ND
2015-02-233193191ND
2015-02-233193477ND
2015-02-233193132ND
2015-02-233193123ND
2015-02-233193158ND
2015-02-233193486ND
2015-03-173209648ND
2015-03-173209650ND