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EWG's Tap Water Database — 2021 UPDATE

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Cobalt

Wailuku

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

MORE ABOUT THIS CONTAMINANT

 

87

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND650ND
2015ND220ND
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
2014-05-20201405220359AMND
2014-05-20201405220596AMND
2014-05-20201405220487AMND
2014-05-20201405220517AMND
2014-05-20201405220350AMND
2014-05-20201405220365AMND
2014-05-20201405220374AMND
2014-05-20201405220363AMND
2014-05-20201405220352AMND
2014-05-20201405220346AMND
2014-05-20201405220348AMND
2014-05-20201405220354AMND
2014-05-20201405220511AMND
2014-05-20201405220560AMND
2014-05-20201405220552AMND
2014-05-20201405220557AMND
2014-05-20201405220514AMND
2014-05-20201405220554AMND
2014-05-21201405220356AMND
2014-05-21201405220376AMND
2014-05-21201405230211AMND
2014-08-18201408200301AMND
2014-08-18201408200640AMND
2014-08-18201408200308AMND
2014-08-18201408200593AMND
2014-08-18201408200242AMND
2014-08-18201408200629AMND
2014-08-18201408200642AMND
2014-08-18201408200666AMND
2014-08-18201408210408AMND
2014-08-18201408200675AMND
2014-08-18201408200170AMND
2014-08-18201408200162AMND
2014-08-18201408200495AMND
2014-08-18201408200240AMND
2014-08-18201408200238AMND
2014-08-18201408200174AMND
2014-08-18201408200185AMND
2014-08-18201408200180AMND
2014-08-18201408200604AMND
2014-08-18201408200221AMND
2014-08-28201409030643AMND
2014-08-28201409030634AMND
2014-11-17201411190501AMND
2014-11-17201411190553AMND
2014-11-17201411190543AMND
2014-11-17201411190535AMND
2014-11-17201411190349AMND
2014-11-17201411190330AMND
2014-11-17201411190539AMND
2014-11-17201411190551AMND
2014-11-17201411190575AMND
2014-11-17201411190588AMND
2014-11-17201411190281AMND
2014-11-17201411190711AMND
2014-11-18201411200618AMND
2014-11-18201411200408AMND
2014-11-18201411200624AMND
2014-11-18201411200448AMND
2014-11-18201411200419AMND
2014-11-18201411200530AMND
2014-11-18201411200621AMND
2014-11-18201411200526AMND
2014-11-19201411210530AMND
2014-11-28201412020247AMND
2015-02-17201502191131AMND
2015-02-17201502191041AMND
2015-02-17201502191117AMND
2015-02-17201502191080AMND
2015-02-17201502191096AMND
2015-02-17201502191114AMND
2015-02-17201502191171AMND
2015-02-17201502191043AMND
2015-02-17201502191194AMND
2015-02-17201502191192AMND
2015-02-17201502191082AMND
2015-02-17201502191092AMND
2015-02-17201502191088AMND
2015-02-17201502191123AMND
2015-02-17201502191121AMND
2015-02-17201502191074AMND
2015-02-17201502191187AMND
2015-02-17201502191084AMND
2015-02-18201502200401AMND
2015-02-18201502210064AMND
2015-02-18201502210062AMND
2015-02-20201502230428AMND