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EWG's Tap Water Database — 2021 UPDATE

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Cobalt

Regional Water Authority

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

MORE ABOUT THIS CONTAMINANT

 

36

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND360ND
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
2014-01-2135123679019AMND
2014-01-2135123679025AMND
2014-01-2135123679023AMND
2014-01-2135123679013AMND
2014-01-2135123679011AMND
2014-01-2135123679016AMND
2014-01-2135123679033AMND
2014-01-2135123679039AMND
2014-01-2135123679035AMND
2014-01-2135123679037AMND
2014-01-2135123679001AMND
2014-01-2135123679029AMND
2014-01-2135123679017AMND
2014-01-2135123679021AMND
2014-01-2135123679007AMND
2014-01-2135123679027AMND
2014-01-2135123679005AMND
2014-01-2135123679009AMND
2014-01-2135123679031AMND
2014-01-2135123679003AMND
2014-04-2835135837001AMND
2014-04-2835135837011AMND
2014-04-2835135837003AMND
2014-04-2835135837007AMND
2014-04-2835135837005AMND
2014-04-2835135837009AMND
2014-04-2935136068001AMND
2014-04-2935136068003AMND
2014-10-212036262004ND
2014-10-212036262001ND
2014-10-212036262005ND
2014-10-212036262006ND
2014-10-212036262007ND
2014-10-212036262003ND
2014-10-212036262008ND
2014-10-212036262002ND