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EWG's Tap Water Database — 2019 UPDATE

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Chromium (hexavalent)

City of Columbia

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
2013N/A00N/A
20140.0918 ppb880.0530 ppb - 0.110 ppb
20150.0855 ppb880.0640 ppb - 0.120 ppb
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
2014-07-14201407160604AM0.110 ppb
2014-07-14201407160626AM0.0970 ppb
2014-07-14201407160691AM0.0970 ppb
2014-07-14201407160557AM0.110 ppb
2014-10-14201410160419AM0.0980 ppb
2014-10-14201410160417AM0.0530 ppb
2014-10-28201410300179AM0.1000 ppb
2014-10-28201410300184AM0.0690 ppb
2015-01-13201501150478AM0.1000 ppb
2015-01-13201501150661AM0.0660 ppb
2015-01-13201501150679AM0.0640 ppb
2015-01-26201501280564AM0.0850 ppb
2015-04-14201504160399AM0.0660 ppb
2015-04-14201504160447AM0.110 ppb
2015-04-14201504160335AM0.0730 ppb
2015-04-14201504160290AM0.120 ppb