Chromium (hexavalent)

City of Gilroy

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	0.609 ppb	28	21	ND - 1.70 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
2014-01-14	A3L2052-19A	0.970 ppb
2014-01-14	A3L2052-05A	0.530 ppb
2014-01-14	A3L2052-07A	0.740 ppb
2014-01-14	A3L2052-03A	0.690 ppb
2014-01-14	A3L2052-15A	1.10 ppb
2014-01-14	A3L2052-17A	0.710 ppb
2014-01-14	A3L2052-09A	1.70 ppb
2014-01-14	A3L2052-11A	1.40 ppb
2014-03-24	A4C1501-01A	0.740 ppb
2014-05-27	A4C1893-01A	0.240 ppb
2014-07-08	A4F1134-16A	0.930 ppb
2014-07-08	A4F1134-10A	0.560 ppb
2014-07-08	A4F1134-01A	0.580 ppb
2014-07-08	A4F1134-28A	0.850 ppb
2014-07-08	A4F1134-07A	0.390 ppb
2014-07-08	A4F1134-22A	0.640 ppb
2014-07-08	A4F1134-13A	1.10 ppb
2014-08-04	A4G2633-01A	0.0560 ppb
2014-09-16	A4I0774-01A	0.720 ppb
2014-10-15	5810-007-0836	1.30 ppb
2014-10-15	5810-002-1050	ND
2014-10-15	5810-004-1030	ND
2014-10-15	5810-006-0946	ND
2014-10-15	5810-011-1010	ND
2014-10-15	5810-008-0852	1.10 ppb
2014-10-15	5810-001-0759	ND
2014-10-15	5810-009-0852	ND
2014-10-15	5810-010-0818	ND