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EWG's Tap Water Database — 2019 UPDATE

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Cobalt

Lafayette

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

 

16

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
2015ND160ND
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
2015-03-163206860ND
2015-03-163206837ND
2015-03-173208192ND
2015-03-173208697ND
2015-06-113260392ND
2015-06-153262411ND
2015-06-153262289ND
2015-07-203283347ND
2015-09-013313027ND
2015-09-013313005ND
2015-09-023314454ND
2015-09-023314393ND
2015-12-073370087ND
2015-12-073370073ND
2015-12-093371798ND
2015-12-093372175ND