Chromium (hexavalent)

Santa Monica

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	1.17 ppb	3	2	ND - 1.90 ppb
2015	0.560 ppb	12	11	ND - 1.60 ppb
2016	0.800 ppb	2	1	ND - 1.60 ppb
2017	0.800 ppb	2	1	ND - 1.60 ppb
2018	0.850 ppb	2	1	ND - 1.70 ppb
2019	0.900 ppb	2	1	ND - 1.80 ppb

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
2014-08-25	9590-071-0950	ND
2014-08-25	9590-015-0639	1.90 ppb
2014-08-25	9590-012-0856	1.60 ppb
2015-01-05	201501060464AM	0.190 ppb
2015-01-05	201501060470AM	0.550 ppb
2015-01-05	201501060468AM	0.190 ppb
2015-01-05	201501060466AM	1.60 ppb
2015-04-06	201504080149AM	0.200 ppb
2015-07-06	201507080483AM	0.240 ppb
2015-07-06	201507080481AM	0.180 ppb
2015-07-06	201507080477AM	0.170 ppb
2015-07-06	201507080479AM	1.60 ppb
2015-08-24	9590-071-1111	ND
2015-08-24	9590-012-1030	1.60 ppb
2015-10-05	201510060286AM	0.200 ppb
2016-08-22	9590-071-1018	ND
2016-08-22	9590-012-0935	1.60 ppb
2017-08-28	9590-071-0625	ND
2017-08-28	9590-012-1145	1.60 ppb
2018-08-06	9590-071-0632	ND
2018-08-14	9590-012-1304	1.70 ppb
2019-08-05	9590-071-1125	ND
2019-08-05	9590-012-0759	1.80 ppb