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EWG's Tap Water Database — 2021 UPDATE

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Cobalt

Lahaina

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
2013ND80ND
2014ND80ND
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
2013-09-17201309200164AMND
2013-09-17201309200052AMND
2013-09-17201309200184AMND
2013-09-17201309200085AMND
2013-12-16201312180604AMND
2013-12-16201312180612AMND
2013-12-16201312180610AMND
2013-12-19201312210093AMND
2014-03-17201403190632AMND
2014-03-17201403190636AMND
2014-03-17201403190844AMND
2014-03-17201403190848AMND
2014-06-17201406190434AMND
2014-06-17201406190436AMND
2014-06-17201406190428AMND
2014-06-17201406190430AMND