Chromium (hexavalent)

City of Rexburg

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	0.437 ppb	10	10	0.190 ppb - 1.000 ppb
2015	0.493 ppb	10	10	0.190 ppb - 1.10 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
2014-08-27	201408290812AM	0.480 ppb
2014-08-27	201408300011AM	0.570 ppb
2014-08-27	201408290800AM	0.310 ppb
2014-08-27	201408300013AM	0.190 ppb
2014-08-27	201408300007AM	0.350 ppb
2014-08-27	201408300009AM	0.370 ppb
2014-08-27	201408300005AM	0.370 ppb
2014-08-27	201408300003AM	0.330 ppb
2014-08-27	201409020076AM	0.400 ppb
2014-08-27	201408300015AM	1.000 ppb
2015-02-11	201502130052AM	0.330 ppb
2015-02-11	201502120651AM	0.370 ppb
2015-02-11	201502130048AM	0.370 ppb
2015-02-11	201502120469AM	0.300 ppb
2015-02-11	201502130064AM	0.360 ppb
2015-02-17	201502191189AM	0.190 ppb
2015-02-17	201502190991AM	0.300 ppb
2015-02-17	201502191169AM	1.10 ppb
2015-02-17	201502191021AM	0.870 ppb
2015-02-17	201502191119AM	0.740 ppb