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EWG's Tap Water Database

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Chromium (hexavalent)

Little Thompson WD

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).

 

8

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2010N/A00N/A
2011N/A00N/A
2012N/A00N/A
2013N/A00N/A
20140.0367 ppb65ND - 0.0600 ppb
20150.0250 ppb21ND - 0.0500 ppb

ppb = parts per billion.

State and national drinking water standards and health guidelines

Health Guideline 0.02 ppb

The 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 Result
2014-05-200.0500 ppb
2014-05-20ND
2014-08-190.0300 ppb
2014-08-190.0400 ppb
2014-11-180.0600 ppb
2014-11-180.0400 ppb
2015-02-170.0500 ppb
2015-02-17ND