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EWG's Tap Water Database

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Cobalt

Arapahoe Cnty Wwwa

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

 

32

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2010N/A00N/A
2011N/A00N/A
2012N/A00N/A
2013N/A00N/A
2014ND310ND
20151.40 ppb111.40 ppb

ppb = parts per billion.

State and national drinking water standards and health guidelines

Health Guideline 70 ppb

The 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 Result
2014-05-06ND
2014-05-06ND
2014-05-06ND
2014-05-06ND
2014-05-06ND
2014-05-06ND
2014-05-06ND
2014-05-07ND
2014-05-07ND
2014-05-07ND
2014-05-07ND
2014-05-07ND
2014-05-07ND
2014-05-07ND
2014-05-07ND
2014-05-14ND
2014-11-10ND
2014-11-10ND
2014-11-10ND
2014-11-10ND
2014-11-10ND
2014-11-10ND
2014-11-10ND
2014-11-10ND
2014-11-12ND
2014-11-17ND
2014-11-17ND
2014-11-17ND
2014-11-18ND
2014-11-19ND
2014-11-20ND
2015-06-251.40 ppb