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EWG's Tap Water Database — 2021 UPDATE

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Cobalt

West Sound Utility District #1

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
2014ND180ND
2015ND180ND
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
2014-09-22201409240534AMND
2014-09-22201409240416AMND
2014-09-22201409240418AMND
2014-09-22201409240412AMND
2014-09-22201409240477AMND
2014-09-22201409240400AMND
2014-09-23201409250525AMND
2014-09-23201409250515AMND
2014-09-23201409250596AMND
2014-09-23201409250638AMND
2014-09-24201409260328AMND
2014-09-24201409260313AMND
2014-09-24201409260273AMND
2014-09-24201409260302AMND
2014-09-24201409260271AMND
2014-09-24201409260268AMND
2014-09-24201409260275AMND
2014-09-24201409260300AMND
2015-03-16201503180471AMND
2015-03-16201503180741AMND
2015-03-16201503180569AMND
2015-03-16201503180707AMND
2015-03-16201503180807AMND
2015-03-16201503180434AMND
2015-03-16201503180809AMND
2015-03-16201503180580AMND
2015-03-17201503190512AMND
2015-03-17201503190566AMND
2015-03-17201503190483AMND
2015-03-17201503190660AMND
2015-03-17201503190658AMND
2015-03-17201503190607AMND
2015-03-18201503200142AMND
2015-03-18201503200254AMND
2015-03-18201503200243AMND
2015-03-18201503200132AMND