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EWG's Tap Water Database — 2021 UPDATE

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Cobalt

City of Orange

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

MORE ABOUT THIS CONTAMINANT

 

43

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND150ND
2014ND280ND
2015N/A00N/A
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
2013-03-043010027826ND
2013-03-053010027827ND
2013-03-063010027824ND
2013-03-063010027997ND
2013-06-103010027827-2ND
2013-06-103010027826-2ND
2013-06-113010027997-2ND
2013-06-113010027824-2ND
2013-09-033010027826-3ND
2013-09-033010027827-3ND
2013-09-043010027997-3ND
2013-09-043010027824-3ND
2013-12-093010027824-4ND
2013-12-093010027827-4ND
2013-12-103010027997-4ND
2014-02-053010027826-4AND
2014-05-133010027998-1ND
2014-05-133010027804-1ND
2014-05-133010027805-1ND
2014-05-133010027816-1ND
2014-05-133010027817-1ND
2014-05-133010027803-1ND
2014-05-143010027809-1ND
2014-05-143010027825-1ND
2014-05-143010027806-1ND
2014-05-143010027813-1ND
2014-05-143010027808-1ND
2014-05-143010027812-1ND
2014-05-143010027802-1ND
2014-10-1314100373ND
2014-10-1314100370ND
2014-10-1314100376ND
2014-10-1314100371ND
2014-10-1314100375ND
2014-10-1314100374ND
2014-10-1314100372ND
2014-10-1414100427ND
2014-10-1414100430ND
2014-10-1414100428ND
2014-10-1414100431ND
2014-10-1414100426ND
2014-10-1414100425ND
2014-10-1414100429ND