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EWG's Tap Water Database — 2019 UPDATE

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Cobalt

Johnson Utilities

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

 

39

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
2014N/A00N/A
2015ND390ND
2016N/A00N/A
2017N/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
2015-01-193173507ND
2015-01-193173557ND
2015-01-193173626ND
2015-01-193173543ND
2015-01-213175874ND
2015-01-273178373ND
2015-01-283181103ND
2015-01-283179081ND
2015-01-283181241ND
2015-02-093185889ND
2015-02-103186238ND
2015-02-233194536ND
2015-02-233194473ND
2015-02-233194481ND
2015-02-233194477ND
2015-02-243195531ND
2015-02-243195523ND
2015-02-243195557ND
2015-02-243195565ND
2015-07-143279531ND
2015-07-143280679ND
2015-07-143280711ND
2015-07-143279539ND
2015-07-143280732ND
2015-07-143280688ND
2015-07-153281582ND
2015-07-153281569ND
2015-07-153281599ND
2015-07-153281590ND
2015-07-213285527ND
2015-07-213285470ND
2015-07-213285491ND
2015-07-213285558ND
2015-07-213285584ND
2015-07-213285487ND
2015-07-213285512ND
2015-07-213285552ND
2015-08-173304017ND
2015-12-103373048ND