Know Your Environment. Protect Your Health.

Cobalt

King County Water District #20

NOTE: King County Water District #20 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
2013ND20ND
2014ND60ND
2015ND160ND
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/A00N/A
2020N/A00N/A
2021N/A00N/A
2022N/A00N/A
2023N/A00N/A

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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: King County Water District #20 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