Chromium (hexavalent)

Carmichael Water District

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	0.790 ppb	13	10	ND - 2.00 ppb
2015	1.04 ppb	9	8	ND - 3.20 ppb
2016	ND	2	0	ND
2017	ND	2	0	ND
2018	N/A	0	0	N/A
2019	ND	1	0	ND

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
2014-12-04	A4K2005-07A	1.30 ppb
2014-12-04	A4K2005-04A	0.720 ppb
2014-12-04	A4K2005-19A	0.0810 ppb
2014-12-04	A4K2005-17A	1.40 ppb
2014-12-04	A4K2005-15A	1.30 ppb
2014-12-04	A4K2005-10A	2.00 ppb
2014-12-04	A4K2005-13A	0.0880 ppb
2014-12-04	A4K2005-01A	0.0850 ppb
2014-12-17	5810-022-0852	ND
2014-12-17	5810-023-0913	ND
2014-12-17	5810-021-1103	ND
2014-12-17	5810-009-0947	1.30 ppb
2014-12-17	5810-006-1022	2.00 ppb
2015-03-05	A5B1905-01A	0.140 ppb
2015-03-05	A5B1905-04A	0.120 ppb
2015-06-04	5810-006-1039	1.50 ppb
2015-06-04	5810-021-1146	ND
2015-06-04	5810-020-0921	3.20 ppb
2015-06-04	5810-016-0954	3.00 ppb
2015-06-04	5810-009-1108	1.30 ppb
2015-09-23	A5H2575-01A	0.0570 ppb
2015-09-23	A5H2575-04A	0.0760 ppb
2016-03-10	5810-023-0920	ND
2016-03-10	5810-022-0905	ND
2017-03-21	5810-023-1040	ND
2017-03-21	5810-022-1100	ND
2019-03-14	5810-022-0850	ND