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EWG's Tap Water Database — 2021 UPDATE

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Cobalt

Los Angeles Department of Water and Power

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

MORE ABOUT THIS CONTAMINANT

 

76

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND580ND
2014ND180ND
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
2013-04-09AW06664ND
2013-04-09AW06666ND
2013-04-10AW06730ND
2013-04-10AW06732ND
2013-04-10AW06736ND
2013-04-10AW06734ND
2013-04-10AW06672ND
2013-04-10AW06678ND
2013-04-10AW06676ND
2013-04-10AW06674ND
2013-04-11AW06668ND
2013-04-11AW06714ND
2013-04-11AW06724ND
2013-04-11AW06716ND
2013-04-11AW06728ND
2013-04-11AW06720ND
2013-04-11AW06682ND
2013-04-11AW06680ND
2013-04-11AW06718ND
2013-04-11AW06722ND
2013-04-11AW06726ND
2013-04-11AW06670ND
2013-07-25AW14487ND
2013-07-25AW14491ND
2013-07-25AW14493ND
2013-07-25AW14481ND
2013-07-25AW14483ND
2013-07-25AW14479ND
2013-07-25AW14489ND
2013-07-25AW14485ND
2013-07-26AW14600ND
2013-07-26AW14592ND
2013-07-26AW14602ND
2013-07-26AW14598ND
2013-07-26AW14604ND
2013-07-26AW14590ND
2013-07-26AW14594ND
2013-07-26AW14596ND
2013-10-29AW21562ND
2013-10-29AW21558ND
2013-10-29AW21552ND
2013-10-29AW21550ND
2013-10-29AW21560ND
2013-10-29AW21556ND
2013-10-29AW21554ND
2013-10-29AW21564ND
2013-10-30AW21582ND
2013-10-30AW21586ND
2013-10-30AW21574ND
2013-10-30AW21578ND
2013-10-30AW21584ND
2013-10-30AW21588ND
2013-10-30AW21580ND
2013-10-30AW21576ND
2013-10-31AW21572ND
2013-10-31AW21566ND
2013-10-31AW21570ND
2013-10-31AW21568ND
2014-03-18AX05574ND
2014-03-18AX05576ND
2014-03-18AX05572ND
2014-03-18AX05580ND
2014-03-18AX05578ND
2014-03-18AX05570ND
2014-03-19AX05670ND
2014-03-19AX05662ND
2014-03-19AX05664ND
2014-03-19AX05672ND
2014-03-19AX05668ND
2014-03-19AX05666ND
2014-03-20AX05768ND
2014-03-20AX05776ND
2014-03-20AX05774ND
2014-03-20AX05770ND
2014-03-20AX05778ND
2014-03-20AX05772ND