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EWG's Tap Water Database — 2019 UPDATE

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Cobalt

City of Hewitt

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

 

22

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
2013ND90ND
2014ND130ND
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
2013-10-09Q1308728013ND
2013-10-09Q1308728009ND
2013-10-09Q1308728001ND
2013-10-09Q1308728017ND
2013-10-09Q1308728011ND
2013-10-09Q1308728007ND
2013-10-09Q1308728005ND
2013-10-09Q1308728015ND
2013-10-09Q1308728003ND
2014-01-14Q1400599003ND
2014-01-14Q1400599001ND
2014-04-17Q1412218011ND
2014-04-17Q1412218015ND
2014-04-17Q1412218017ND
2014-04-17Q1412218013ND
2014-04-17Q1412218009ND
2014-04-17Q1412218001ND
2014-04-17Q1412218007ND
2014-04-17Q1412218003ND
2014-04-17Q1412218005ND
2014-07-29Q1431973003ND
2014-07-29Q1431973001ND