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EWG's Tap Water Database — 2021 UPDATE

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Chromium (hexavalent)

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Chromium (hexavalent) is a carcinogen that commonly contaminates American drinking water. Chromium (hexavalent) in drinking water may be due to industrial pollution or natural occurrences in mineral deposits and groundwater. Read more about chromium (hexavalent).

MORE ABOUT THIS CONTAMINANT

 

20

Samples

0

Samples exceeding legal limit (MCL)

7

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20130.0261 ppb185ND - 0.140 ppb
20140.0605 ppb220.0320 ppb - 0.0890 ppb
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 0.02 ppb

The EWG Health Guideline of 0.02 ppb for chromium (hexavalent) was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date Lab ID Result
2013-05-06201305080484AMND
2013-05-06201305080359AMND
2013-05-06201305080495AMND
2013-05-06201305080513AMND
2013-05-06201305080492AMND
2013-05-06201305080461AMND
2013-05-06201305080433AMND
2013-05-06201305080329AM0.0700 ppb
2013-08-05201308070416AM0.0920 ppb
2013-08-05201308070418AM0.0370 ppb
2013-11-04201311060562AMND
2013-11-04201311060558AMND
2013-11-04201311060564AMND
2013-11-04201311060550AM0.130 ppb
2013-11-04201311060568AMND
2013-11-04201311060556AM0.140 ppb
2013-11-04201311060560AMND
2013-11-05201311060554AMND
2014-02-03201402050108AM0.0320 ppb
2014-02-03201402050138AM0.0890 ppb