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EWG's Tap Water Database — 2021 UPDATE

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Cobalt

Los Angeles County WW District 4 & 34-Lancaster

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

MORE ABOUT THIS CONTAMINANT

 

38

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND170ND
2014ND210ND
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
2013-11-14201311150378AMND
2013-11-18201311200623AMND
2013-11-18201311200611AMND
2013-11-18201311210815AMND
2013-11-18201311210801AMND
2013-11-19201311220608AMND
2013-11-19201311220610AMND
2013-11-19201311250078AMND
2013-11-19201311250062AMND
2013-11-20201312020193AMND
2013-11-20201311270080AMND
2013-11-20201312020184AMND
2013-11-20201311270082AMND
2013-11-25201312040648AMND
2013-11-25201312030254AMND
2013-11-25201312030252AMND
2013-11-26201312040650AMND
2014-02-13201402140367AMND
2014-02-13201402140365AMND
2014-05-13201405160379AMND
2014-05-13201405160338AMND
2014-05-13201405160381AMND
2014-05-14201405160334AMND
2014-05-14201405160355AMND
2014-05-14201405160336AMND
2014-05-14201405220244AMND
2014-05-14201405190271AMND
2014-05-14201405190269AMND
2014-05-14201405160332AMND
2014-05-20201405230366AMND
2014-05-20201405220248AMND
2014-05-21201405290634AMND
2014-05-21201405230368AMND
2014-05-21201405230356AMND
2014-05-27201405290654AMND
2014-05-27201405290650AMND
2014-08-07201408120561AMND
2014-08-07201408120547AMND