Chromium (hexavalent)

City of Safford

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	0.647 ppb	10	10	0.170 ppb - 0.830 ppb
2014	0.528 ppb	10	10	0.260 ppb - 0.770 ppb
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
2013-12-09	201312100292AM	0.760 ppb
2013-12-09	201312100282AM	0.760 ppb
2013-12-09	201312100300AM	0.830 ppb
2013-12-09	201312100278AM	0.800 ppb
2013-12-09	201312100294AM	0.790 ppb
2013-12-09	201312110767AM	0.830 ppb
2013-12-09	201312110798AM	0.790 ppb
2013-12-09	201312120806AM	0.530 ppb
2013-12-09	201312110727AM	0.210 ppb
2013-12-09	201312110795AM	0.170 ppb
2014-06-17	201406190407AM	0.530 ppb
2014-06-17	201406190382AM	0.560 ppb
2014-06-17	201406190384AM	0.550 ppb
2014-06-17	201406190297AM	0.550 ppb
2014-06-17	201406190378AM	0.580 ppb
2014-06-17	201406200226AM	0.770 ppb
2014-06-17	201406190438AM	0.260 ppb
2014-06-17	201406190409AM	0.730 ppb
2014-06-17	201406190386AM	0.430 ppb
2014-06-17	201406190425AM	0.320 ppb