Chromium (total)

Ventura Water Department

Chromium is a naturally occurring metal, but industrial uses can elevate its levels in water. One form, hexavalent chromium, causes cancer. Total chromium is not a good indicator of the amount of hexavalent chromium in drinking water.

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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	ND	6	0	ND
2014	0.0209 ppb	11	1	ND - 0.230 ppb
2015	ND	5	0	ND
2016	N/A	0	0	N/A
2017	N/A	0	0	N/A
2018	ND	9	0	ND
2019	N/A	0	0	N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 100 ppb

The legal limit for total chromium, established in 1991, was based on a 1958 toxicity study in laboratory animals, and applies to both the less-toxic trivalent chromium and the more-toxic hexavalent chromium forms of this compound. This limit does not protect against the risk of cancer from ingestion of hexavalent chromium.

ppb = parts per billion

All test results

Date	Lab ID	Result
2013-07-23	3G23085-03A	ND
2013-07-23	3G23085-01A	ND
2013-07-23	3G23085-07A	ND
2013-07-23	3G23085-05A	ND
2013-10-22	3J22025-03A	ND
2013-10-22	3J22025-01A	ND
2014-01-21	4A21021-01A	ND
2014-01-21	4A21021-03A	ND
2014-01-21	4A21021-05A	ND
2014-02-25	4B25031-01A	ND
2014-03-10	2911-007-1210	ND
2014-03-10	2911-027-1140	ND
2014-03-10	2911-015-1010	ND
2014-03-10	2911-006-1220	ND
2014-04-07	2911-031-1325	ND
2014-04-21	4D21019-03A	ND
2014-04-21	4D21019-01A	0.230 ppb
2015-04-06	2911-006-1039	ND
2015-04-06	2911-007-1048	ND
2015-04-06	2911-015-1212	ND
2015-04-06	2911-027-1115	ND
2015-04-06	2911-031-1130	ND
2018-08-01	5867-027-1346	ND
2018-08-01	5867-031-1350	ND
2018-08-06	5867-015-0900	ND
2018-08-06	5867-007-1005	ND
2018-08-06	5867-006-0955	ND
2018-09-04	5867-015-1240	ND
2018-09-04	5867-007-1153	ND
2018-09-04	5867-031-1130	ND
2018-09-04	5867-006-1147	ND