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EWG's Tap Water Database — 2019 UPDATE

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Cobalt

City of Caldwell

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

 

52

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
2014ND260ND
2015ND260ND
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
2014-11-24141201001-012ND
2014-11-24141201001-009ND
2014-11-24141201001-008ND
2014-11-24141201001-005ND
2014-11-24141201004-007ND
2014-11-24141201001-003ND
2014-11-24141201001-004ND
2014-11-24141201001-007ND
2014-11-24141201001-010ND
2014-11-24141201001-002ND
2014-11-24141201001-011ND
2014-11-24141201001-006ND
2014-11-24141201001-001ND
2014-11-24141201004-008ND
2014-11-24141201004-010ND
2014-11-25141201004-002ND
2014-11-25141201004-003ND
2014-11-25141201004-009ND
2014-11-25141201004-005ND
2014-11-25141201004-001ND
2014-11-25141201004-004ND
2014-11-25141201004-011ND
2014-11-25141201004-006ND
2014-12-01141202018-001ND
2014-12-01141202018-002ND
2014-12-01141202018-003ND
2015-05-26150528035-003ND
2015-05-26150528035-002ND
2015-05-26150528035-008ND
2015-05-26150528035-005ND
2015-05-26150528035-001ND
2015-05-27150529019-004ND
2015-05-27150529019-012ND
2015-05-27150529019-014ND
2015-05-27150528035-010ND
2015-05-27150529019-008ND
2015-05-27150529019-010ND
2015-05-27150529019-005ND
2015-05-27150529019-011ND
2015-05-27150529019-013ND
2015-05-27150528035-009ND
2015-05-27150528035-006ND
2015-05-27150528035-004ND
2015-05-27150528035-007ND
2015-05-27150529019-009ND
2015-05-27150529019-007ND
2015-05-27150529019-015ND
2015-05-27150529019-016ND
2015-05-28150529019-002ND
2015-05-28150529019-001ND
2015-07-30150803001-002ND
2015-07-30150803001-001ND