Chromium (hexavalent)

Los Angeles County WW District 4 & 34-Lancaster

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

206

Samples

Samples exceeding legal limit (MCL)

205

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2013	8.74 ppb	17	17	0.300 ppb - 16.0 ppb
2014	7.81 ppb	46	45	ND - 16.4 ppb
2015	11.5 ppb	52	52	1.58 ppb - 17.3 ppb
2016	11.4 ppb	76	76	7.20 ppb - 16.9 ppb
2017	11.0 ppb	15	15	6.20 ppb - 16.0 ppb
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
2013-11-14	201311150378AM	1.20 ppb
2013-11-18	201311200611AM	16.0 ppb
2013-11-19	201311250062AM	8.40 ppb
2013-11-19	201311250078AM	12.0 ppb
2013-11-19	201311220608AM	5.40 ppb
2013-11-19	201311220610AM	11.0 ppb
2013-11-20	201312020193AM	9.00 ppb
2013-11-20	201311270080AM	12.0 ppb
2013-11-20	201312020184AM	6.00 ppb
2013-11-20	201311270082AM	8.40 ppb
2013-11-25	201312040648AM	12.0 ppb
2013-11-25	201312030254AM	14.0 ppb
2013-11-25	201312030252AM	6.00 ppb
2013-11-26	201312040650AM	0.300 ppb
2013-12-11	201312140178AM	5.30 ppb
2013-12-11	201312140176AM	13.0 ppb
2013-12-11	201312140179AM	8.50 ppb
2014-02-13	201402140365AM	1.30 ppb
2014-02-13	201402140367AM	2.90 ppb
2014-04-21	5442-040-1135	9.31 ppb
2014-05-13	201405160381AM	13.0 ppb
2014-05-13	201405160338AM	10.00 ppb
2014-05-13	201405160379AM	7.90 ppb
2014-05-14	201405190271AM	12.0 ppb
2014-05-14	201405220244AM	12.0 ppb
2014-05-14	201405160332AM	5.30 ppb
2014-05-14	201405190269AM	8.30 ppb
2014-05-14	201405160336AM	6.60 ppb
2014-05-14	201405160355AM	1.90 ppb
2014-05-14	201405160334AM	0.630 ppb
2014-05-20	201405220248AM	9.40 ppb
2014-05-20	201405230366AM	12.0 ppb
2014-05-21	201405230356AM	12.0 ppb
2014-05-21	201405230368AM	15.0 ppb
2014-05-21	201405290634AM	12.0 ppb
2014-05-27	201405290650AM	4.50 ppb
2014-05-27	201405290654AM	8.90 ppb
2014-08-07	201408120547AM	0.360 ppb
2014-08-07	201408120561AM	0.420 ppb
2014-12-03	5442-016-0820	1.19 ppb
2014-12-03	5442-023-0835	6.31 ppb
2014-12-08	5442-002-1020	11.3 ppb
2014-12-08	5442-011-0915	16.4 ppb
2014-12-08	5442-037-1035	10.2 ppb
2014-12-08	5442-053-1040	11.1 ppb
2014-12-08	5442-054-1045	10.2 ppb
2014-12-08	5442-055-0925	13.5 ppb
2014-12-09	5442-036-0843	5.08 ppb
2014-12-10	5442-026-0826	5.83 ppb
2014-12-10	5442-041-0810	5.31 ppb
2014-12-10	5442-045-0930	ND
2014-12-10	5442-067-1101	9.88 ppb
2014-12-10	5442-069-1000	6.36 ppb
2014-12-10	5442-070-0935	9.42 ppb
2014-12-10	5442-071-0925	10.1 ppb
2014-12-10	5442-094-1045	5.87 ppb
2014-12-10	5442-095-1055	6.58 ppb
2014-12-11	5442-028-0900	9.83 ppb
2014-12-11	5442-035-1013	6.45 ppb
2014-12-11	5442-048-0923	9.47 ppb
2014-12-11	5442-062-0915	6.56 ppb
2014-12-11	5442-063-0919	8.65 ppb
2014-12-11	5442-093-0900	8.12 ppb
2015-03-04	5442-002-0930	14.1 ppb
2015-03-04	5442-011-1020	17.2 ppb
2015-03-04	5442-053-0910	11.9 ppb
2015-03-12	5442-055-1000	15.5 ppb
2015-06-01	5442-101-1135	14.5 ppb
2015-06-02	5442-037-0815	15.1 ppb
2015-06-02	5442-053-0930	11.3 ppb
2015-06-02	5442-054-0915	11.3 ppb
2015-06-05	5442-101-1220	13.4 ppb
2015-06-09	5442-011-1110	17.3 ppb
2015-06-09	5442-055-1050	16.1 ppb
2015-06-12	5442-037-0835	11.2 ppb
2015-06-12	5442-053-0830	11.2 ppb
2015-06-12	5442-054-0830	10.7 ppb
2015-07-14	5442-037-1000	11.0 ppb
2015-07-14	5442-053-0945	11.7 ppb
2015-07-14	5442-054-0930	10.9 ppb
2015-08-18	5442-037-0930	10.7 ppb
2015-08-18	5442-053-0950	12.0 ppb
2015-08-18	5442-054-0945	10.8 ppb
2015-09-22	5442-037-1030	11.0 ppb
2015-09-22	5442-053-1045	11.9 ppb
2015-09-22	5442-054-1040	10.8 ppb
2015-10-13	5442-037-0955	10.8 ppb
2015-10-13	5442-053-0947	11.5 ppb
2015-10-13	5442-054-0951	10.5 ppb
2015-11-17	5442-011-1000	16.6 ppb
2015-11-17	5442-055-1005	15.0 ppb
2015-11-18	5442-037-0940	10.6 ppb
2015-11-18	5442-053-0955	11.8 ppb
2015-11-18	5442-054-0950	10.8 ppb
2015-11-24	5442-037-0830	9.22 ppb
2015-11-24	5442-053-0823	11.6 ppb
2015-11-24	5442-054-0825	11.2 ppb
2015-11-30	5442-037-1030	9.19 ppb
2015-11-30	5442-053-0945	12.0 ppb
2015-11-30	5442-054-0950	11.4 ppb
2015-12-07	5442-037-0910	8.08 ppb
2015-12-07	5442-053-0845	11.0 ppb
2015-12-07	5442-054-0850	11.0 ppb
2015-12-14	5442-037-0812	1.58 ppb
2015-12-14	5442-053-0829	11.2 ppb
2015-12-14	5442-054-0827	10.4 ppb
2015-12-21	5442-037-0915	11.0 ppb
2015-12-21	5442-053-0930	12.0 ppb
2015-12-21	5442-054-0925	10.9 ppb
2015-12-23	5442-037-0950	3.86 ppb
2015-12-23	5442-053-0935	11.6 ppb
2015-12-23	5442-054-0930	11.1 ppb
2015-12-29	5442-037-1010	5.57 ppb
2015-12-29	5442-053-0945	11.7 ppb
2015-12-29	5442-054-0940	11.1 ppb
2016-01-05	5442-037-1000	7.20 ppb
2016-01-05	5442-053-0950	11.6 ppb
2016-01-05	5442-054-0945	10.7 ppb
2016-01-12	5442-037-1045	10.7 ppb
2016-01-12	5442-053-1020	12.0 ppb
2016-01-12	5442-054-1020	11.2 ppb
2016-01-12	5442-054-1025	11.0 ppb
2016-01-19	5442-037-1100	7.69 ppb
2016-01-19	5442-053-1050	10.9 ppb
2016-01-19	5442-054-1045	10.3 ppb
2016-01-25	5442-037-0840	9.89 ppb
2016-01-25	5442-053-0820	11.2 ppb
2016-01-25	5442-054-0825	10.6 ppb
2016-01-26	5442-011-1020	16.8 ppb
2016-01-26	5442-055-1010	15.2 ppb
2016-02-01	5442-053-1125	12.0 ppb
2016-02-01	5442-054-1130	11.0 ppb
2016-02-02	5442-037-0940	8.66 ppb
2016-02-08	5442-037-1140	10.2 ppb
2016-02-08	5442-053-1115	11.8 ppb
2016-02-08	5442-054-1120	10.9 ppb
2016-02-16	5442-037-1140	10.4 ppb
2016-02-16	5442-053-1120	11.7 ppb
2016-02-16	5442-054-1125	10.6 ppb
2016-02-22	5442-037-1105	10.8 ppb
2016-02-22	5442-053-1045	11.5 ppb
2016-02-22	5442-054-1050	10.9 ppb
2016-02-29	5442-037-1145	10.1 ppb
2016-02-29	5442-053-1120	11.6 ppb
2016-02-29	5442-054-1130	10.7 ppb
2016-03-15	5442-037-1040	10.9 ppb
2016-03-15	5442-053-1015	11.8 ppb
2016-03-15	5442-054-1020	10.6 ppb
2016-04-19	5442-011-1050	16.9 ppb
2016-04-19	5442-055-1045	15.4 ppb
2016-05-09	5442-101-1147	10.7 ppb
2016-05-12	5442-011-0940	16.1 ppb
2016-05-12	5442-055-0930	15.3 ppb
2016-05-12	5442-101-0905	9.01 ppb
2016-05-16	5442-101-0945	9.56 ppb
2016-05-18	5442-037-1022	14.7 ppb
2016-05-18	5442-053-0959	11.9 ppb
2016-05-18	5442-054-0955	11.3 ppb
2016-05-23	5442-070-1110	13.0 ppb
2016-05-23	5442-071-1105	13.1 ppb
2016-05-23	5442-101-1000	9.59 ppb
2016-06-03	5442-037-0908	8.55 ppb
2016-06-03	5442-101-0931	8.10 ppb
2016-06-06	5442-101-1052	7.82 ppb
2016-06-14	5442-101-1010	7.81 ppb
2016-06-20	5442-101-0933	7.86 ppb
2016-06-28	5442-037-1128	11.4 ppb
2016-06-28	5442-053-1156	12.0 ppb
2016-06-28	5442-054-1150	11.1 ppb
2016-07-20	5442-037-1104	10.4 ppb
2016-07-20	5442-053-1112	11.2 ppb
2016-07-20	5442-054-1116	10.6 ppb
2016-07-25	5442-011-1120	16.2 ppb
2016-07-25	5442-055-1040	14.0 ppb
2016-08-24	5442-037-1002	10.1 ppb
2016-08-24	5442-053-0916	11.5 ppb
2016-08-24	5442-054-0921	10.8 ppb
2016-09-14	5442-037-1154	11.0 ppb
2016-09-14	5442-053-1158	11.7 ppb
2016-09-14	5442-054-1154	11.0 ppb
2016-10-19	5442-037-1106	11.0 ppb
2016-10-19	5442-053-1040	11.4 ppb
2016-10-19	5442-054-1033	11.0 ppb
2016-10-25	5442-011-1025	16.7 ppb
2016-10-25	5442-055-1000	15.0 ppb
2016-11-16	5442-037-1158	11.5 ppb
2016-11-16	5442-053-1059	11.9 ppb
2016-11-16	5442-054-1052	11.5 ppb
2016-12-08	5442-037-0915	11.3 ppb
2016-12-08	5442-053-0935	11.7 ppb
2016-12-08	5442-054-0925	11.4 ppb
2017-01-24	5442-037-0900	10.8 ppb
2017-01-24	5442-053-0900	11.0 ppb
2017-01-24	5442-054-0900	10.9 ppb
2017-01-25	5442-011-1050	16.0 ppb
2017-01-25	5442-055-1100	14.4 ppb
2017-02-08	5442-037-1130	13.0 ppb
2017-02-08	5442-053-1115	13.0 ppb
2017-02-08	5442-054-1120	13.0 ppb
2017-03-15	5442-037-1045	12.0 ppb
2017-03-15	5442-053-1000	12.0 ppb
2017-03-15	5442-054-1015	12.0 ppb
2017-05-22	9590-101-1100	6.30 ppb
2017-06-13	9588-101-0810	7.20 ppb
2017-06-19	9588-101-1110	7.10 ppb
2017-06-26	9588-101-0945	6.20 ppb