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EWG's Tap Water Database — 2021 UPDATE

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Cobalt

Hoke County Regional Water System

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

MORE ABOUT THIS CONTAMINANT

 

32

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20130.219 ppb314ND - 2.10 ppb
2014ND10ND
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/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
2013-01-301304515-03ND
2013-01-301304515-16ND
2013-01-301304515-14ND
2013-01-301304515-18ND
2013-01-301304515-19ND
2013-01-301304515-15ND
2013-01-301304515-12ND
2013-01-301304515-13ND
2013-01-301304515-17ND
2013-01-301304515-08ND
2013-01-301304515-051.40 ppb
2013-01-301304515-02ND
2013-01-301304515-07ND
2013-01-301304515-011.40 ppb
2013-01-301304515-06ND
2013-07-16201307190647AMND
2013-07-16201307190651AMND
2013-07-16201307190631AMND
2013-07-16201307190629AM2.10 ppb
2013-07-16201307190635AMND
2013-07-16201307190633AMND
2013-07-16201307190649AMND
2013-07-16201307190643AMND
2013-07-16201307190645AMND
2013-07-16201307190639AMND
2013-07-16201307190641AMND
2013-07-16201307190637AMND
2013-07-16201307190623AMND
2013-07-16201307190621AM1.90 ppb
2013-07-16201307190627AMND
2013-07-16201307190625AMND
2014-03-10201403120452AMND