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EWG's Tap Water Database — 2021 UPDATE

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Cobalt

Arizona Water Company - Pinal Valley

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

MORE ABOUT THIS CONTAMINANT

 

38

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND360ND
2014ND20ND
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
2013-04-252815328ND
2013-04-252815241ND
2013-04-252815488ND
2013-04-252815196ND
2013-04-252815319ND
2013-04-252815215ND
2013-04-252815168ND
2013-04-252815373ND
2013-04-252815250ND
2013-04-252815261ND
2013-04-252815362ND
2013-04-252815340ND
2013-04-252815351ND
2013-04-252815173ND
2013-04-252815184ND
2013-04-252815478ND
2013-10-232919219ND
2013-10-302922995ND
2013-10-302923163ND
2013-10-302923105ND
2013-10-302923120ND
2013-10-302922978ND
2013-10-302923189ND
2013-10-302922939ND
2013-10-302922970ND
2013-10-302923000ND
2013-10-302922991ND
2013-10-302923007ND
2013-10-302923061ND
2013-10-302923205ND
2013-10-302923081ND
2013-10-302923152ND
2013-10-302923174ND
2013-11-132931583ND
2013-12-102943713ND
2013-12-102943710ND
2014-02-192978276ND
2014-06-183048308ND