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EWG's Tap Water Database — 2019 UPDATE

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Cobalt

Hilo

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
2013ND80ND
2014ND80ND
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
2013-09-23201309250118AMND
2013-09-23201309250121AMND
2013-09-23201309250035AMND
2013-09-23201309250113AMND
2013-09-23201309250037AMND
2013-09-23201309250033AMND
2013-09-23201309250031AMND
2013-09-23201309250130AMND
2014-03-24201403260456AMND
2014-03-24201403260442AMND
2014-03-24201403260471AMND
2014-03-24201403260446AMND
2014-03-24201403260453AMND
2014-03-24201403260451AMND
2014-03-24201403260462AMND
2014-03-24201403260469AMND