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EWG's Tap Water Database — 2019 UPDATE

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Cobalt

Water District 1 of Johnson County

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

 

15

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
2013ND80ND
2014ND70ND
2015N/A00N/A
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
2013-07-29201307300098AMND
2013-07-29201307300096AMND
2013-07-29201307300100AMND
2013-07-29201307300094AMND
2013-10-21201310220209AMND
2013-10-21201310220205AMND
2013-10-21201310220203AMND
2013-10-21201310220207AMND
2014-01-13201401140253AMND
2014-01-13201401140257AMND
2014-01-13201401140255AMND
2014-04-08201404090433AMND
2014-04-08201404090431AMND
2014-04-08201404090435AMND
2014-05-21201405220480AMND