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EWG's Tap Water Database

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Cobalt

Jefferson County PWSD 3

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

 

10

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2010N/A00N/A
2011N/A00N/A
2012N/A00N/A
2013ND80ND
2014ND20ND
2015N/A00N/A

ppb = parts per billion.

State and national drinking water standards and health guidelines

Health Guideline 70 ppb

The 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
2013-04-08AB94706ND
2013-04-08AB94708ND
2013-05-29AB97448ND
2013-05-29AB97446ND
2013-08-21AC08978ND
2013-08-21AC08976ND
2013-11-20AC15039ND
2013-11-20AC15041ND
2014-02-25AC19143ND
2014-02-25AC19145ND