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EWG's Tap Water Database — 2019 UPDATE

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Chromium (hexavalent)

South-Central Service Area

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).

 

16

Samples

0

Samples exceeding legal limit (MCL)

16

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
20130.1000 ppb440.0690 ppb - 0.130 ppb
20140.0835 ppb12120.0470 ppb - 0.140 ppb
2015N/A00N/A
2016N/A00N/A
2017N/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 Result
2013-10-240.0690 ppb
2013-10-240.130 ppb
2013-10-240.130 ppb
2013-10-240.0710 ppb
2014-01-150.110 ppb
2014-01-150.0620 ppb
2014-01-150.140 ppb
2014-01-150.0470 ppb
2014-04-100.130 ppb
2014-04-110.0980 ppb
2014-04-280.0870 ppb
2014-04-280.0680 ppb
2014-07-150.0470 ppb
2014-07-150.0840 ppb
2014-07-150.0730 ppb
2014-07-150.0560 ppb