Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Cobalt

Chapel Hill - Aberdeen Proving Grounds

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

 

8

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
2014ND20ND
2015ND60ND
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
2014-10-222036080004ND
2014-10-222036080001ND
2015-01-212050772001ND
2015-01-212050772004ND
2015-04-282067623004ND
2015-04-282067623001ND
2015-07-232085077004ND
2015-07-232085077001ND