Chromium (hexavalent)

California American Water Company - Suburban

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

132

Samples

Samples exceeding legal limit (MCL)

121

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	3.06 ppb	66	61	ND - 5.30 ppb
2015	3.47 ppb	40	39	ND - 5.46 ppb
2016	N/A	0	0	N/A
2017	3.45 ppb	24	20	ND - 7.06 ppb
2018	ND	1	0	ND
2019	2.09 ppb	1	1	2.09 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
2014-05-06	5810-001-1207	ND
2014-05-06	5810-004-1330	5.30 ppb
2014-05-06	5810-007-1105	4.30 ppb
2014-05-06	5810-011-1238	4.20 ppb
2014-05-06	5810-013-1210	2.50 ppb
2014-05-06	5810-016-1115	4.60 ppb
2014-05-06	5810-017-0930	3.00 ppb
2014-05-06	5810-019-1030	4.20 ppb
2014-05-06	5810-020-0810	ND
2014-05-06	5810-048-0950	4.80 ppb
2014-05-06	5810-049-1100	5.00 ppb
2014-05-06	5810-051-1030	4.60 ppb
2014-05-06	5810-052-1130	1.30 ppb
2014-05-06	5810-053-1215	ND
2014-05-07	5810-006-1020	3.60 ppb
2014-05-07	5810-008-0935	2.10 ppb
2014-05-07	5810-009-1340	3.50 ppb
2014-05-07	5810-010-0945	3.20 ppb
2014-05-07	5810-014-1005	ND
2014-05-07	5810-015-0930	1.90 ppb
2014-05-07	5810-021-1128	4.70 ppb
2014-05-07	5810-044-1100	3.90 ppb
2014-05-07	5810-047-1135	4.40 ppb
2014-05-08	5810-005-0900	2.80 ppb
2014-05-08	5810-012-1145	3.60 ppb
2014-06-17	5810-018-1150	2.50 ppb
2014-10-06	27313301	2.73 ppb
2014-10-06	27147901	3.98 ppb
2014-10-06	27148101	4.45 ppb
2014-10-06	27147701	2.64 ppb
2014-10-06	27147801	0.770 ppb
2014-10-06	27484301	3.52 ppb
2014-10-06	27148401	2.35 ppb
2014-10-06	27147201	2.11 ppb
2014-10-06	27312701	3.34 ppb
2014-10-06	27312901	2.97 ppb
2014-10-06	27146301	4.45 ppb
2014-10-06	27312601	3.39 ppb
2014-10-06	27146101	2.49 ppb
2014-10-06	27484201	3.05 ppb
2014-10-06	27146701	1.21 ppb
2014-10-06	27146901	3.77 ppb
2014-10-06	27146601	4.34 ppb
2014-10-06	27313901	2.60 ppb
2014-10-08	27148201	1.94 ppb
2014-10-08	27147401	4.17 ppb
2014-10-08	27147601	4.78 ppb
2014-10-08	27147301	3.63 ppb
2014-10-08	27313001	1.50 ppb
2014-10-08	27146501	1.18 ppb
2014-10-08	27312401	4.50 ppb
2014-10-08	27145801	3.86 ppb
2014-10-08	27145501	4.76 ppb
2014-10-08	27146001	3.06 ppb
2014-10-08	27313701	5.01 ppb
2014-10-08	27314201	ND
2014-10-15	27148301	0.460 ppb
2014-10-15	27312801	2.38 ppb
2014-10-15	27312301	3.22 ppb
2014-10-15	27313201	2.97 ppb
2014-10-15	27313601	4.02 ppb
2014-10-15	27314001	4.35 ppb
2014-10-15	27314101	1.47 ppb
2014-10-23	27313401	3.80 ppb
2014-10-23	27312201	3.47 ppb
2014-12-10	27940101	3.28 ppb
2015-04-06	28697901	2.99 ppb
2015-04-06	28697801	4.56 ppb
2015-04-06	28698001	4.89 ppb
2015-04-06	28698401	4.00 ppb
2015-04-06	28698201	0.560 ppb
2015-04-06	28698301	2.63 ppb
2015-04-06	28695501	2.80 ppb
2015-04-06	28696501	4.91 ppb
2015-04-06	28696301	4.18 ppb
2015-04-06	28698901	2.97 ppb
2015-04-07	28697401	4.22 ppb
2015-04-07	28697301	3.38 ppb
2015-04-07	28697501	5.27 ppb
2015-04-07	28695101	3.64 ppb
2015-04-07	28694801	5.46 ppb
2015-04-07	28696401	3.05 ppb
2015-04-07	28696901	3.73 ppb
2015-04-07	28699001	4.68 ppb
2015-04-08	28698501	4.18 ppb
2015-04-09	28697201	3.71 ppb
2015-04-09	28695201	3.74 ppb
2015-04-09	28696801	2.96 ppb
2015-04-09	28699201	ND
2015-04-15	28698701	5.25 ppb
2015-04-23	28697601	2.99 ppb
2015-04-23	28696701	3.41 ppb
2015-05-11	29061401	5.04 ppb
2015-05-11	29061301	5.03 ppb
2015-05-11	29061201	3.37 ppb
2015-05-11	29061801	3.37 ppb
2015-05-12	29061501	3.04 ppb
2015-05-14	29247001	4.47 ppb
2015-06-18	29589701	3.37 ppb
2015-07-08	29299401	1.68 ppb
2015-07-09	29910901	0.870 ppb
2015-07-28	29292901	4.17 ppb
2015-07-30	29268601	2.08 ppb
2015-07-30	29299301	1.23 ppb
2015-09-16	28695701	2.14 ppb
2015-09-16	28698601	4.94 ppb
2017-03-07	1225-010-0920	3.01 ppb
2017-05-08	1225-001-0835	ND
2017-05-08	1225-004-0925	7.06 ppb
2017-05-08	1225-005-1215	3.37 ppb
2017-05-08	1225-006-1005	3.41 ppb
2017-05-08	1225-008-1250	1.52 ppb
2017-05-08	1225-011-1330	3.74 ppb
2017-05-08	1225-012-0910	3.32 ppb
2017-05-08	1225-013-1035	2.53 ppb
2017-05-08	1225-017-0945	2.77 ppb
2017-05-08	1225-019-1110	5.00 ppb
2017-05-08	1225-021-1155	3.04 ppb
2017-05-08	1225-044-1110	3.85 ppb
2017-05-08	1225-048-1015	4.46 ppb
2017-05-09	1225-020-1205	ND
2017-05-09	1225-051-0945	6.31 ppb
2017-05-09	1225-053-0830	ND
2017-05-10	1225-007-0925	5.40 ppb
2017-05-10	1225-016-1050	6.24 ppb
2017-05-10	1225-047-1230	5.97 ppb
2017-05-10	1225-049-0840	6.44 ppb
2017-05-10	1225-052-0930	1.38 ppb
2017-10-12	1225-050-1240	4.02 ppb
2017-12-06	1225-014-1140	ND
2018-09-11	1233-009-0845	ND
2019-08-12	1225-015-1215	2.09 ppb