Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Cobalt

City of Kirkland

NOTE: City of Kirkland purchases water from Seattle Public Utilities which is required to test for cobalt. Sample information shown below was taken by Seattle Public Utilities.

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
2012N/A00N/A
2013N/A00N/A
2014ND40ND
2015ND40ND
2016N/A00N/A
2017N/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

NOTE: City of Kirkland purchases water from Seattle Public Utilities which is required to test for cobalt. Sample information shown below was taken by Seattle Public Utilities.

Date Lab ID Result
2015-01-13201501140525AMND
2015-01-13201501140512AMND
2015-01-13201501140623AMND
2015-01-13201501140778AMND
2015-04-06201504070229AMND
2015-04-06201504070416AMND
2015-04-06201504070341AMND
2015-04-06201504070359AMND
2015-07-22201507230343AMND
2015-07-22201507230341AMND
2015-07-22201507230482AMND
2015-07-22201507230496AMND
2015-10-13201509280095AMND
2015-10-13201509280094AMND
2015-10-13201509280091AMND
2015-10-13201509280090AMND