Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Cobalt

Cal-am Water Company - Duarte

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

 

18

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
2013ND180ND
2014N/A00N/A
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
2013-03-0621126801ND
2013-03-0621127101ND
2013-03-0621127001ND
2013-03-1221126901ND
2013-03-1221126401ND
2013-03-1221126301ND
2013-03-1321127201ND
2013-03-1321126501ND
2013-03-1321269901ND
2013-09-1023394101ND
2013-09-1023394501ND
2013-09-1023394701ND
2013-09-1023394601ND
2013-09-1023394201ND
2013-09-1023394801ND
2013-09-1023394401ND
2013-09-1023394301ND
2013-09-1023394901ND