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EWG's Tap Water Database — 2021 UPDATE

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Cobalt

S S WSC

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

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND100ND
20140.112 ppb101ND - 1.12 ppb
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
2013-11-20Q1314322009ND
2013-11-20Q1314322005ND
2013-11-20Q1314322011ND
2013-11-20Q1314322019ND
2013-11-20Q1314322017ND
2013-11-20Q1314322015ND
2013-11-20Q1314322007ND
2013-11-20Q1314322013ND
2013-11-20Q1314322001ND
2013-11-20Q1314322003ND
2014-05-20Q1416802013ND
2014-05-20Q1416802007ND
2014-05-20Q1416802003ND
2014-05-20Q1416802005ND
2014-05-20Q1416802019ND
2014-05-20Q1416802015ND
2014-05-20Q1416802017ND
2014-05-20Q1416802011ND
2014-05-20Q1416802009ND
2014-05-20Q14168020011.12 ppb