Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Cobalt

Spanaway Water Company

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

MORE ABOUT THIS CONTAMINANT

 

37

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND360ND
2015ND10ND
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
2014-04-15201404160620AMND
2014-04-15201404160827AMND
2014-04-15201404160567AMND
2014-04-15201404160565AMND
2014-04-15201404160581AMND
2014-04-15201404160630AMND
2014-04-21201404220212AMND
2014-04-21201404220370AMND
2014-04-21201404230324AMND
2014-04-21201404220388AMND
2014-04-21201404230330AMND
2014-04-21201404220210AMND
2014-04-21201404230367AMND
2014-04-21201404220367AMND
2014-04-21201404230359AMND
2014-04-21201404220254AMND
2014-04-22201404230341AMND
2014-04-29201404300789AMND
2014-10-06201410070338AMND
2014-10-06201410070319AMND
2014-10-06201410070399AMND
2014-10-06201410070328AMND
2014-10-06201410070305AMND
2014-10-06201410070285AMND
2014-10-06201410070303AMND
2014-10-06201410070334AMND
2014-10-06201410070325AMND
2014-10-07201410080377AMND
2014-10-07201410080390AMND
2014-10-07201410080392AMND
2014-10-07201410080459AMND
2014-10-21201410220345AMND
2014-10-21201410220343AMND
2014-10-21201410220193AMND
2014-10-22201410230325AMND
2014-11-12201411130680AMND
2015-07-23201507240287AMND