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EWG's Tap Water Database — 2021 UPDATE

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Cobalt

Kalaheo-Koloa

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

MORE ABOUT THIS CONTAMINANT

 

32

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND150ND
2014ND160ND
2015ND10ND
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
2013-11-14201311200587AMND
2013-11-14201311200635AMND
2013-11-14201311200584AMND
2013-11-15201311200529AMND
2013-11-15201311200443AMND
2013-11-15201311200655AMND
2013-11-15201311200668AMND
2013-11-15201311200415AMND
2013-11-15201311200651AMND
2013-11-15201311200653AMND
2013-11-15201311200549AMND
2013-11-15201311200546AMND
2013-11-15201311200637AMND
2013-11-15201311200639AMND
2013-11-19201311200536AMND
2014-05-14201405160330AMND
2014-05-14201405160328AMND
2014-05-14201405160326AMND
2014-05-19201405210807AMND
2014-05-19201405210830AMND
2014-05-19201405210824AMND
2014-05-19201405210577AMND
2014-05-19201405210582AMND
2014-05-19201405210832AMND
2014-05-28201405290502AMND
2014-05-28201405290496AMND
2014-05-28201405290500AMND
2014-05-28201405290498AMND
2014-05-28201405290494AMND
2014-06-24201406260432AMND
2014-08-13201408150392AMND
2015-07-31201508040429AMND