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EWG's Tap Water Database — 2019 UPDATE

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Chromium (hexavalent)

City of Denison

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).

 

10

Samples

0

Samples exceeding legal limit (MCL)

9

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
20140.156 ppb87ND - 0.550 ppb
20150.490 ppb220.460 ppb - 0.520 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
2014-04-2435135556005AM0.0530 ppb
2014-04-2435135556003AM0.0850 ppb
2014-04-2435135556007AMND
2014-04-2435135556001AM0.0520 ppb
2014-10-3035161880007AM0.280 ppb
2014-10-3035161880001AM0.170 ppb
2014-10-3035161880005AM0.550 ppb
2014-10-3035161880003AM0.0580 ppb
2015-01-2935173367003AM0.460 ppb
2015-01-2935173367001AM0.520 ppb