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EWG's Tap Water Database — 2019 UPDATE

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Cobalt

City of Hereford

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
2013ND160ND
2014N/A00N/A
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
2013-05-23Q1301489005ND
2013-05-23Q1301489009ND
2013-05-23Q1301489011ND
2013-05-23Q1301489015ND
2013-05-23Q1301489013ND
2013-05-23Q1301489001ND
2013-05-23Q1301489003ND
2013-05-23Q1301489007ND
2013-12-03Q1315543013ND
2013-12-03Q1315543001ND
2013-12-03Q1315543003ND
2013-12-03Q1315543007ND
2013-12-03Q1315543011ND
2013-12-03Q1315543005ND
2013-12-03Q1315543009ND
2013-12-03Q1315543015ND