Dichloroacetic acid

Valencia Water Company

Dichloroacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

192

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	N/A	0	0	N/A
2014	ND	32	0	ND
2015	0.0344 ppb	32	1	ND - 1.10 ppb
2016	0.109 ppb	32	2	ND - 1.80 ppb
2017	1.12 ppb	32	18	ND - 3.60 ppb
2018	1.56 ppb	32	22	ND - 5.00 ppb
2019	2.49 ppb	32	26	ND - 7.00 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.2 ppb

The EWG Health Guideline of 0.2 ppb for dichloroacetic acid was proposed in 2020 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.a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-01-13	9590-800-0850	ND
2014-01-13	9590-801-1005	ND
2014-01-13	9590-802-0916	ND
2014-01-13	9590-803-1135	ND
2014-01-13	9590-804-1335	ND
2014-01-13	9590-805-1315	ND
2014-01-13	9590-806-0945	ND
2014-01-13	9590-807-0805	ND
2014-04-14	9590-800-1120	ND
2014-04-14	9590-801-0928	ND
2014-04-14	9590-802-0810	ND
2014-04-14	9590-803-1320	ND
2014-04-14	9590-804-1100	ND
2014-04-14	9590-805-1335	ND
2014-04-14	9590-806-1015	ND
2014-04-14	9590-807-1130	ND
2014-07-14	9590-800-1300	ND
2014-07-14	9590-801-1100	ND
2014-07-14	9590-802-0815	ND
2014-07-14	9590-803-1315	ND
2014-07-14	9590-804-1230	ND
2014-07-14	9590-805-1345	ND
2014-07-14	9590-806-1000	ND
2014-07-14	9590-807-1410	ND
2014-10-13	9590-800-1100	ND
2014-10-13	9590-801-1400	ND
2014-10-13	9590-802-0900	ND
2014-10-13	9590-803-1400	ND
2014-10-13	9590-804-1455	ND
2014-10-13	9590-805-1415	ND
2014-10-13	9590-806-1300	ND
2014-10-13	9590-807-1545	ND
2015-01-12	9590-800-1040	ND
2015-01-12	9590-801-1130	ND
2015-01-12	9590-802-0840	ND
2015-01-12	9590-803-0910	ND
2015-01-12	9590-804-1120	ND
2015-01-12	9590-805-0950	ND
2015-01-12	9590-806-1100	ND
2015-01-12	9590-807-1340	ND
2015-04-13	9590-800-1330	1.10 ppb
2015-04-13	9590-801-1450	ND
2015-04-13	9590-802-1400	ND
2015-04-13	9590-803-1030	ND
2015-04-13	9590-804-1310	ND
2015-04-13	9590-805-0940	ND
2015-04-13	9590-806-1345	ND
2015-04-13	9590-807-1420	ND
2015-07-13	9590-800-1311	ND
2015-07-13	9590-801-1345	ND
2015-07-13	9590-802-1245	ND
2015-07-13	9590-803-1331	ND
2015-07-13	9590-804-1302	ND
2015-07-13	9590-805-1350	ND
2015-07-13	9590-806-1330	ND
2015-07-13	9590-807-1235	ND
2015-10-12	9590-800-1135	ND
2015-10-12	9590-801-0930	ND
2015-10-12	9590-802-0838	ND
2015-10-12	9590-803-1315	ND
2015-10-12	9590-804-0936	ND
2015-10-12	9590-805-1307	ND
2015-10-12	9590-806-1006	ND
2015-10-12	9590-807-0750	ND
2016-01-11	9590-800-0900	ND
2016-01-11	9590-801-1010	ND
2016-01-11	9590-802-1050	ND
2016-01-11	9590-803-1310	ND
2016-01-11	9590-804-1400	ND
2016-01-11	9590-805-1330	ND
2016-01-11	9590-806-0940	ND
2016-01-11	9590-807-1110	ND
2016-04-18	9590-800-0928	ND
2016-04-18	9590-801-1040	1.70 ppb
2016-04-18	9590-802-1100	ND
2016-04-18	9590-803-1255	ND
2016-04-18	9590-804-1345	ND
2016-04-18	9590-805-1320	ND
2016-04-18	9590-806-1010	ND
2016-04-18	9590-807-1120	ND
2016-07-18	9590-800-1012	ND
2016-07-18	9590-801-0858	ND
2016-07-18	9590-802-0830	ND
2016-07-18	9590-803-1042	ND
2016-07-18	9590-804-0919	ND
2016-07-18	9590-805-1120	ND
2016-07-18	9590-806-0924	ND
2016-07-18	9590-807-0810	ND
2016-10-17	9590-800-0910	ND
2016-10-17	9590-801-1000	1.80 ppb
2016-10-17	9590-802-0835	ND
2016-10-17	9590-803-1130	ND
2016-10-17	9590-804-1100	ND
2016-10-17	9590-805-1145	ND
2016-10-17	9590-806-0935	ND
2016-10-17	9590-807-1025	ND
2017-01-17	9590-800-1015	ND
2017-01-17	9590-801-1045	2.00 ppb
2017-01-17	9590-802-1100	2.10 ppb
2017-01-17	9590-803-0930	ND
2017-01-17	9590-804-0900	ND
2017-01-17	9590-805-0945	ND
2017-01-17	9590-806-1030	ND
2017-01-17	9590-807-0835	ND
2017-04-17	9590-800-1000	1.80 ppb
2017-04-17	9590-801-1040	1.80 ppb
2017-04-17	9590-802-1055	1.90 ppb
2017-04-17	9590-803-0915	2.00 ppb
2017-04-17	9590-804-1130	2.00 ppb
2017-04-17	9590-805-0935	1.90 ppb
2017-04-17	9590-806-1020	2.20 ppb
2017-04-17	9590-807-1110	2.30 ppb
2017-07-18	9590-800-0905	ND
2017-07-18	9590-801-0935	1.50 ppb
2017-07-18	9590-802-0955	ND
2017-07-18	9590-803-1045	2.10 ppb
2017-07-18	9590-804-1020	1.70 ppb
2017-07-18	9590-805-1100	1.90 ppb
2017-07-18	9590-806-0920	ND
2017-07-18	9590-807-0835	ND
2017-10-16	9590-800-1005	ND
2017-10-16	9590-801-1030	3.60 ppb
2017-10-16	9590-802-0950	ND
2017-10-16	9590-803-1125	ND
2017-10-16	9590-804-1100	1.40 ppb
2017-10-16	9590-805-1130	2.30 ppb
2017-10-16	9590-806-1015	1.20 ppb
2017-10-16	9590-807-1045	ND
2018-01-16	9590-800-0903	ND
2018-01-16	9590-801-0932	2.90 ppb
2018-01-16	9590-802-0945	3.00 ppb
2018-01-16	9590-803-0826	1.70 ppb
2018-01-16	9590-804-1021	3.00 ppb
2018-01-16	9590-805-0840	ND
2018-01-16	9590-806-0917	ND
2018-01-16	9590-807-1000	ND
2018-04-16	9590-800-0840	ND
2018-04-16	9590-801-0905	5.00 ppb
2018-04-16	9590-802-0925	2.40 ppb
2018-04-16	9590-803-0810	2.80 ppb
2018-04-16	9590-804-1005	ND
2018-04-16	9590-805-0820	2.20 ppb
2018-04-16	9590-806-0855	1.60 ppb
2018-04-16	9590-807-0945	1.50 ppb
2018-07-16	9590-800-0845	ND
2018-07-16	9590-801-0925	3.10 ppb
2018-07-16	9590-802-0945	1.70 ppb
2018-07-16	9590-803-0810	2.10 ppb
2018-07-16	9590-804-1020	1.10 ppb
2018-07-16	9590-805-0820	2.20 ppb
2018-07-16	9590-806-0905	ND
2018-07-16	9590-807-1000	ND
2018-10-15	9590-800-0835	ND
2018-10-15	9590-801-0800	3.00 ppb
2018-10-15	9590-802-0850	1.70 ppb
2018-10-15	9590-803-0945	2.10 ppb
2018-10-15	9590-804-1110	1.60 ppb
2018-10-15	9590-805-0920	2.10 ppb
2018-10-15	9590-806-0815	1.70 ppb
2018-10-15	9590-807-1135	1.30 ppb
2019-01-14	9590-800-0910	1.20 ppb
2019-01-14	9590-801-1000	3.30 ppb
2019-01-14	9590-802-1015	1.30 ppb
2019-01-14	9590-803-0835	2.20 ppb
2019-01-14	9590-804-1100	ND
2019-01-14	9590-805-0845	ND
2019-01-14	9590-806-0935	ND
2019-01-14	9590-807-1030	ND
2019-04-15	9590-800-0935	4.60 ppb
2019-04-15	9590-801-1020	4.00 ppb
2019-04-15	9590-802-1040	3.80 ppb
2019-04-15	9590-803-0840	5.80 ppb
2019-04-15	9590-804-1125	3.50 ppb
2019-04-15	9590-805-0900	7.00 ppb
2019-04-15	9590-806-1000	4.60 ppb
2019-04-15	9590-807-1100	4.60 ppb
2019-07-15	9590-800-0920	2.20 ppb
2019-07-15	9590-801-1030	2.00 ppb
2019-07-15	9590-802-1050	2.30 ppb
2019-07-15	9590-803-0835	2.50 ppb
2019-07-15	9590-804-1200	1.70 ppb
2019-07-15	9590-805-0900	3.60 ppb
2019-07-15	9590-806-0955	2.10 ppb
2019-07-15	9590-807-1125	2.40 ppb
2019-10-14	9590-800-1125	2.30 ppb
2019-10-14	9590-801-0815	2.50 ppb
2019-10-14	9590-802-0835	2.60 ppb
2019-10-14	9590-803-1040	3.30 ppb
2019-10-14	9590-804-0935	ND
2019-10-14	9590-805-1100	1.70 ppb
2019-10-14	9590-806-1210	2.50 ppb
2019-10-14	9590-807-0905	ND