Chromium (hexavalent)

City of Phoenix

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
2013	0.408 ppb	24	24	0.125 ppb - 1.60 ppb
2014	N/A	0	0	N/A
2015	N/A	0	0	N/A
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
2013-02-19	201302190252AM	0.840 ppb
2013-02-19	201302190253AM	0.950 ppb
2013-02-19	201302190251AM	1.60 ppb
2013-02-19	201302190250AM	0.250 ppb
2013-02-19	201302190249AM	0.840 ppb
2013-02-26	201302270121AM	0.280 ppb
2013-05-14	2013029531	0.173 ppb
2013-05-14	2013029491	0.387 ppb
2013-05-15	2013029544	0.227 ppb
2013-05-15	2013029548	0.189 ppb
2013-05-15	2013029540	0.196 ppb
2013-05-16	201305160365AM	0.840 ppb
2013-08-13	2013050793	0.136 ppb
2013-08-13	2013050843	0.610 ppb
2013-08-13	2013050839	0.593 ppb
2013-08-13	2013050810	0.139 ppb
2013-08-14	2013051056	0.140 ppb
2013-08-14	2013051060	0.141 ppb
2013-11-06	2013070950	0.390 ppb
2013-11-06	2013070989	0.131 ppb
2013-11-06	2013070993	0.326 ppb
2013-11-06	2013070942	0.125 ppb
2013-11-06	2013070946	0.142 ppb
2013-11-06	2013070954	0.135 ppb