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EWG's Tap Water Database — 2019 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).

 

44

Samples

0

Samples exceeding legal limit (MCL)

39

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
20140.429 ppb4439ND - 2.00 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 Lab ID Result
2014-01-27201401280197AM0.0580 ppb
2014-01-27201401280199AM1.60 ppb
2014-01-27201401280213AM0.0340 ppb
2014-01-27201401280230AM0.0380 ppb
2014-04-23201404240197AM0.320 ppb
2014-04-23201404240342AM0.530 ppb
2014-04-23201404240561AMND
2014-04-23201404240378AM1.50 ppb
2014-04-23201404240478AMND
2014-04-23201404240446AM0.0450 ppb
2014-04-29201404300473AM0.0410 ppb
2014-04-29201404300778AM0.220 ppb
2014-04-29201404300470AM1.20 ppb
2014-04-29201404300479AM0.540 ppb
2014-04-29201404300466AM1.20 ppb
2014-04-29201404300766AM2.00 ppb
2014-04-30201405010395AM0.420 ppb
2014-04-30201405010391AM0.930 ppb
2014-04-30201405010408AM0.150 ppb
2014-04-30201405010475AM0.260 ppb
2014-04-30201405010503AM0.250 ppb
2014-04-30201405010429AM0.110 ppb
2014-07-29201407300198AM2.00 ppb
2014-07-29201407300313AM0.0340 ppb
2014-07-29201407300233AM0.0360 ppb
2014-07-29201407300200AM0.0480 ppb
2014-10-06201410070343AM0.720 ppb
2014-10-06201410070321AMND
2014-10-06201410070313AM0.540 ppb
2014-10-06201410070289AMND
2014-10-07201410080463AMND
2014-10-07201410080467AM0.500 ppb
2014-10-07201410080382AM0.0620 ppb
2014-10-07201410080388AM0.0380 ppb
2014-10-09201410100267AM0.180 ppb
2014-10-09201410100225AM1.20 ppb
2014-10-14201410150150AM0.120 ppb
2014-10-14201410150153AM1.20 ppb
2014-10-14201410150249AM0.0300 ppb
2014-10-14201410150227AM0.0340 ppb
2014-10-15201410160296AM0.260 ppb
2014-10-15201410160351AM0.1000 ppb
2014-10-15201410160328AM0.0600 ppb
2014-10-15201410160378AM0.260 ppb