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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

 

32

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.0183 ppb304ND - 0.350 ppb
2015ND20ND
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
2014-02-242982221ND
2014-02-242982103ND
2014-02-242982033ND
2014-02-242982016ND
2014-02-242982233ND
2014-02-242982268ND
2014-02-242982330ND
2014-02-252982289ND
2014-02-252982309ND
2014-03-062991162ND
2014-03-062991164ND
2014-03-062991168ND
2014-03-062991167ND
2014-03-062991165ND
2014-08-043081568ND
2014-08-043081276ND
2014-08-043081203ND
2014-08-043081317ND
2014-09-223110187ND
2014-09-2231101910.350 ppb
2014-09-2231102180.0300 ppb
2014-09-223110193ND
2014-09-2231102220.130 ppb
2014-09-223110221ND
2014-09-223110213ND
2014-09-223110194ND
2014-09-223110192ND
2014-09-223110188ND
2014-10-213127449ND
2014-10-2131274600.0400 ppb
2015-02-253196119ND
2015-03-163209691ND