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EWG's Tap Water Database

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Chromium (hexavalent)

Arapahoe Cnty Wwwa

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).

 

32

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
20140.0419 ppb3114ND - 0.200 ppb
2015ND10ND

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
2014-05-06ND
2014-05-06ND
2014-05-06ND
2014-05-06ND
2014-05-060.0360 ppb
2014-05-06ND
2014-05-06ND
2014-05-07ND
2014-05-070.0760 ppb
2014-05-070.0920 ppb
2014-05-070.0300 ppb
2014-05-070.170 ppb
2014-05-070.0360 ppb
2014-05-070.0370 ppb
2014-05-07ND
2014-05-14ND
2014-11-10ND
2014-11-100.150 ppb
2014-11-100.180 ppb
2014-11-100.0710 ppb
2014-11-100.120 ppb
2014-11-10ND
2014-11-100.200 ppb
2014-11-100.0540 ppb
2014-11-120.0460 ppb
2014-11-17ND
2014-11-17ND
2014-11-17ND
2014-11-18ND
2014-11-19ND
2014-11-20ND
2015-06-25ND