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EWG's Tap Water Database — 2019 UPDATE

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Cobalt

City of Surprise - Mountain Vista

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
2013N/A00N/A
2014ND160ND
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
2014-02-122974519ND
2014-02-122974611ND
2014-02-122974576ND
2014-02-122974510ND
2014-02-122974543ND
2014-02-122974595ND
2014-02-122974537ND
2014-02-272984796ND
2014-08-283096143ND
2014-08-283096101ND
2014-08-283096095ND
2014-08-283096139ND
2014-08-283096132ND
2014-08-283096081ND
2014-10-153125318ND
2014-10-153125328ND