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EWG's Tap Water Database

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Chromium (hexavalent)

Freedom District

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).

 

12

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
20140.151 ppb43ND - 0.310 ppb
20150.0713 ppb86ND - 0.150 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 Lab ID Result
2014-10-1020340910030.310 ppb
2014-10-1020340910010.260 ppb
2014-10-152034864001ND
2014-10-1520348640040.0340 ppb
2015-01-192050166001ND
2015-01-192050276001ND
2015-04-0620633460010.0520 ppb
2015-04-0620633430010.120 ppb
2015-04-2020661110010.150 ppb
2015-04-2020661100010.0440 ppb
2015-07-1320825850010.0540 ppb
2015-07-1320825840010.150 ppb