Chromium (hexavalent)

City of Escondido

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	0.0434 ppb	8	7	ND - 0.110 ppb
2014	ND	4	0	ND
2015	ND	4	0	ND
2016	ND	2	0	ND
2017	ND	2	0	ND
2018	ND	2	0	ND
2019	ND	2	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
2013-02-13	B3B1453-01A	ND
2013-02-13	B3B1453-03A	0.0320 ppb
2013-05-15	B3E1662-03	0.0640 ppb
2013-05-15	B3E1662-01	0.110 ppb
2013-08-14	B3H1406-05	0.0360 ppb
2013-08-14	B3H1406-01	0.0390 ppb
2013-11-13	B3K1115-01	0.0310 ppb
2013-11-13	B3K1115-04	0.0350 ppb
2014-08-18	2706-018-1148	ND
2014-08-18	2706-019-1126	ND
2014-11-17	2706-018-1110	ND
2014-11-17	2706-019-1043	ND
2015-02-09	2706-018-1120	ND
2015-02-17	2706-019-0852	ND
2015-05-18	2706-019-1010	ND
2015-05-18	2706-018-1110	ND
2016-05-16	2706-019-0919	ND
2016-05-16	2706-018-1010	ND
2017-02-13	2706-018-1144	ND
2017-05-09	2706-018-1050	ND
2018-05-15	2706-019-0916	ND
2018-05-15	2706-018-0838	ND
2019-05-13	2706-018-0830	ND
2019-11-12	2706-019-0800	ND