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EWG's Tap Water Database — 2021 UPDATE

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Cobalt

Hope Water Light Comm.

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

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
2015ND140ND
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
2015-03-11Y150710039ND
2015-03-11Y150710038ND
2015-03-11Y150710042ND
2015-03-11Y150710040ND
2015-03-11Y150710041ND
2015-03-11Y150710037ND
2015-06-10Y151620015ND
2015-06-10Y151620014ND
2015-09-09Y152530017ND
2015-09-09Y152530013ND
2015-09-09Y152530016ND
2015-09-09Y152530015ND
2015-09-09Y152530014ND
2015-09-09Y152530012ND