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EWG's Tap Water Database — 2021 UPDATE

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Cobalt

Crescenta Valley CWD

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

MORE ABOUT THIS CONTAMINANT

 

32

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20130.0375 ppb321ND - 1.20 ppb
2014N/A00N/A
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
2013-03-20201303200397AMND
2013-03-20201303200376AMND
2013-03-20201303200391AMND
2013-03-20201303200432AMND
2013-03-20201303200370AMND
2013-03-20201303200430AMND
2013-03-20201303200426AMND
2013-03-20201303200421AMND
2013-03-20201303200393AMND
2013-03-20201303200374AMND
2013-03-20201303200414AMND
2013-03-20201303200372AMND
2013-03-20201303200412AMND
2013-03-20201303200395AMND
2013-06-03201306040462AMND
2013-06-04201306040460AMND
2013-09-17201309170853AMND
2013-09-17201309170922AMND
2013-09-17201309170865AMND
2013-09-17201309170916AMND
2013-09-17201309170832AMND
2013-09-17201309170918AMND
2013-09-17201309170920AMND
2013-09-17201309170933AMND
2013-09-17201309170929AMND
2013-09-17201309170927AMND
2013-09-17201309170931AMND
2013-09-17201309170925AMND
2013-09-17201309170937AMND
2013-09-17201309170935AMND
2013-12-10201312110520AMND
2013-12-10201312100551AM1.20 ppb