Chromium (hexavalent)

Dallas Water Utility

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).

MORE ABOUT THIS CONTAMINANT

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	0.263 ppb	18	18	0.102 ppb - 0.496 ppb
2015	0.309 ppb	6	6	0.132 ppb - 0.440 ppb
2016	N/A	0	0	N/A
2017	N/A	0	0	N/A
2018	N/A	0	0	N/A
2019	N/A	0	0	N/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
2014-04-08	4D10009-02	0.355 ppb
2014-04-08	4D10009-01	0.102 ppb
2014-04-08	4D10009-03	0.496 ppb
2014-04-08	4D10009-06	0.111 ppb
2014-04-08	4D10009-04	0.329 ppb
2014-04-08	4D10009-05	0.402 ppb
2014-07-15	4G18003-02	0.256 ppb
2014-07-15	4G18003-03	0.382 ppb
2014-07-15	4G18003-01	0.154 ppb
2014-07-15	4G18003-06	0.173 ppb
2014-07-15	4G18003-04	0.270 ppb
2014-07-15	4G18003-05	0.171 ppb
2014-10-21	4J24007-01	0.188 ppb
2014-10-21	4J24007-06	0.146 ppb
2014-10-21	4J24007-04	0.271 ppb
2014-10-21	4J24007-05	0.370 ppb
2014-10-21	4J24007-03	0.332 ppb
2014-10-21	4J24007-02	0.226 ppb
2015-01-13	5A16009-06	0.147 ppb
2015-01-13	5A16009-04	0.408 ppb
2015-01-13	5A16009-05	0.332 ppb
2015-01-13	5A16009-01	0.132 ppb
2015-01-13	5A16009-02	0.440 ppb
2015-01-13	5A16009-03	0.396 ppb