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EWG's Tap Water Database — 2021 UPDATE

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Cobalt

City of Corona

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

MORE ABOUT THIS CONTAMINANT

 

60

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND200ND
2014ND400ND
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
2013-10-09201310100242AMND
2013-10-09201310100238AMND
2013-10-09201310100234AMND
2013-10-09201310100250AMND
2013-10-09201310100240AMND
2013-10-09201310100248AMND
2013-10-09201310100236AMND
2013-10-09201310100244AMND
2013-10-09201310100246AMND
2013-10-23201310240256AMND
2013-10-23201310240254AMND
2013-10-23201310240258AMND
2013-10-23201310240248AMND
2013-10-23201310240250AMND
2013-10-23201310240246AMND
2013-10-23201310240240AMND
2013-10-23201310240242AMND
2013-10-23201310240244AMND
2013-10-23201310240260AMND
2013-10-23201310240252AMND
2014-01-15201401150769AMND
2014-01-15201401150773AMND
2014-01-15201401150771AMND
2014-01-15201401150779AMND
2014-01-15201401150777AMND
2014-01-15201401150775AMND
2014-01-16201401170060AMND
2014-01-16201401170066AMND
2014-01-16201401170062AMND
2014-01-16201401170064AMND
2014-04-09201404090849AMND
2014-04-09201404090859AMND
2014-04-09201404090857AMND
2014-04-09201404090851AMND
2014-04-09201404090853AMND
2014-04-09201404090855AMND
2014-04-17201404180158AMND
2014-04-17201404180156AMND
2014-04-17201404180148AMND
2014-04-17201404180150AMND
2014-04-17201404180154AMND
2014-04-17201404180152AMND
2014-04-22201404220791AMND
2014-04-22201404220789AMND
2014-04-24201404240693AMND
2014-04-24201404240699AMND
2014-04-24201404240703AMND
2014-04-24201404240701AMND
2014-04-24201404240697AMND
2014-04-24201404240695AMND
2014-07-10201407100762AMND
2014-07-10201407100760AMND
2014-07-10201407100766AMND
2014-07-10201407100764AMND
2014-07-10201407100756AMND
2014-07-10201407100758AMND
2014-07-15201407150795AMND
2014-07-15201407150791AMND
2014-07-15201407150797AMND
2014-07-15201407150793AMND