Dichloroacetic acid

Cucamonga Valley Water District

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	1.33 ppb	32	18	ND - 3.60 ppb
2015	0.263 ppb	32	5	ND - 2.20 ppb
2016	0.550 ppb	32	8	ND - 3.60 ppb
2017	2.03 ppb	32	18	ND - 10.00 ppb
2018	1.59 ppb	32	23	ND - 6.00 ppb
2019	2.07 ppb	32	21	ND - 12.0 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
2014-01-09	9590-601-1200	3.30 ppb
2014-01-09	9590-602-1050	2.40 ppb
2014-01-09	9590-603-1145	3.20 ppb
2014-01-09	9590-604-0920	3.40 ppb
2014-01-09	9590-605-0940	3.50 ppb
2014-01-09	9590-606-1125	3.60 ppb
2014-01-09	9590-607-1110	2.30 ppb
2014-01-09	9590-608-1010	ND
2014-04-01	9590-601-1207	2.20 ppb
2014-04-01	9590-602-1049	ND
2014-04-01	9590-603-1145	2.10 ppb
2014-04-01	9590-604-0855	ND
2014-04-01	9590-605-0912	ND
2014-04-01	9590-606-1100	1.40 ppb
2014-04-01	9590-607-1006	ND
2014-04-01	9590-608-0945	ND
2014-07-07	9590-601-1040	2.80 ppb
2014-07-07	9590-602-0925	1.40 ppb
2014-07-07	9590-603-0812	2.40 ppb
2014-07-07	9590-604-0825	ND
2014-07-07	9590-605-0840	ND
2014-07-07	9590-606-1010	2.70 ppb
2014-07-07	9590-607-0950	2.00 ppb
2014-07-07	9590-608-0905	ND
2014-10-06	9590-601-1134	ND
2014-10-06	9590-602-0835	1.10 ppb
2014-10-06	9590-603-1120	1.20 ppb
2014-10-06	9590-604-1102	ND
2014-10-06	9590-605-1040	ND
2014-10-06	9590-606-0820	1.40 ppb
2014-10-06	9590-607-0850	ND
2014-10-06	9590-608-0920	ND
2015-01-05	9590-601-1245	ND
2015-01-05	9590-602-0905	ND
2015-01-05	9590-603-1220	ND
2015-01-05	9590-604-1150	ND
2015-01-05	9590-605-1130	ND
2015-01-05	9590-606-1110	ND
2015-01-05	9590-607-1015	ND
2015-01-05	9590-608-1030	ND
2015-04-01	9590-601-1155	1.70 ppb
2015-04-01	9590-602-1109	ND
2015-04-01	9590-603-0835	1.70 ppb
2015-04-01	9590-604-0852	ND
2015-04-01	9590-605-0940	ND
2015-04-01	9590-606-1125	1.70 ppb
2015-04-01	9590-607-1057	ND
2015-04-01	9590-608-1012	ND
2015-07-02	9590-601-1050	ND
2015-07-02	9590-602-1015	ND
2015-07-02	9590-603-0830	ND
2015-07-02	9590-604-0835	ND
2015-07-02	9590-605-0840	ND
2015-07-02	9590-606-1030	ND
2015-07-02	9590-607-1005	ND
2015-07-02	9590-608-0945	ND
2015-10-06	9590-601-1300	1.10 ppb
2015-10-06	9590-602-0930	ND
2015-10-06	9590-603-0800	2.20 ppb
2015-10-06	9590-604-0815	ND
2015-10-06	9590-605-0840	ND
2015-10-06	9590-606-1020	ND
2015-10-06	9590-607-0955	ND
2015-10-06	9590-608-0900	ND
2016-01-06	9590-601-1335	ND
2016-01-06	9590-602-0930	ND
2016-01-06	9590-603-0810	ND
2016-01-06	9590-604-0815	ND
2016-01-06	9590-605-0840	ND
2016-01-06	9590-606-1020	ND
2016-01-06	9590-607-0955	ND
2016-01-06	9590-608-0900	ND
2016-04-05	9590-601-1145	2.40 ppb
2016-04-05	9590-602-1035	ND
2016-04-05	9590-603-0824	2.50 ppb
2016-04-05	9590-604-0842	ND
2016-04-05	9590-605-0910	ND
2016-04-05	9590-606-1107	ND
2016-04-05	9590-607-1050	ND
2016-04-05	9590-608-0945	1.40 ppb
2016-07-06	9590-601-1310	2.10 ppb
2016-07-06	9590-602-1035	ND
2016-07-06	9590-603-0820	3.60 ppb
2016-07-06	9590-604-0826	ND
2016-07-06	9590-605-0840	ND
2016-07-06	9590-606-1155	3.00 ppb
2016-07-06	9590-607-1130	ND
2016-07-06	9590-608-0925	ND
2016-10-05	9590-601-1120	ND
2016-10-05	9590-602-1055	ND
2016-10-05	9590-603-0810	1.50 ppb
2016-10-05	9590-604-0825	ND
2016-10-05	9590-605-0855	ND
2016-10-05	9590-606-1030	1.10 ppb
2016-10-05	9590-607-1010	ND
2016-10-05	9590-608-0910	ND
2017-01-09	9590-601-1120	ND
2017-01-09	9590-602-1055	ND
2017-01-09	9590-603-0810	ND
2017-01-09	9590-604-0825	ND
2017-01-09	9590-605-0855	ND
2017-01-09	9590-606-1030	ND
2017-01-09	9590-607-1010	ND
2017-01-09	9590-608-0910	ND
2017-04-05	9590-601-1100	3.70 ppb
2017-04-05	9590-602-0955	2.70 ppb
2017-04-05	9590-603-1045	3.10 ppb
2017-04-05	9590-604-0827	6.10 ppb
2017-04-05	9590-605-0845	6.90 ppb
2017-04-05	9590-606-1020	10.00 ppb
2017-04-05	9590-607-0935	6.00 ppb
2017-04-05	9590-608-0915	ND
2017-07-06	9590-601-1113	1.70 ppb
2017-07-06	9590-602-1028	ND
2017-07-06	9590-603-1059	1.60 ppb
2017-07-06	9590-604-0913	ND
2017-07-06	9590-605-0927	ND
2017-07-06	9590-606-1040	2.90 ppb
2017-07-06	9590-607-1014	ND
2017-07-06	9590-608-0955	ND
2017-10-05	9590-601-1241	2.30 ppb
2017-10-05	9590-602-1140	2.10 ppb
2017-10-05	9590-603-1218	2.60 ppb
2017-10-05	9590-604-1016	2.20 ppb
2017-10-05	9590-605-1035	1.70 ppb
2017-10-05	9590-606-1152	3.40 ppb
2017-10-05	9590-607-1125	2.30 ppb
2017-10-05	9590-608-1059	3.60 ppb
2018-01-11	9590-601-1201	1.40 ppb
2018-01-11	9590-602-1058	ND
2018-01-11	9590-603-1138	1.90 ppb
2018-01-11	9590-604-0913	ND
2018-01-11	9590-605-0933	5.60 ppb
2018-01-11	9590-606-1115	1.30 ppb
2018-01-11	9590-607-1038	1.70 ppb
2018-01-11	9590-608-1019	6.00 ppb
2018-04-05	9590-601-1121	ND
2018-04-05	9590-602-1028	ND
2018-04-05	9590-603-1105	2.00 ppb
2018-04-05	9590-604-0831	ND
2018-04-05	9590-605-0911	2.10 ppb
2018-04-05	9590-606-1043	3.00 ppb
2018-04-05	9590-607-1011	3.10 ppb
2018-04-05	9590-608-0949	ND
2018-07-09	9588-601-1245	1.20 ppb
2018-07-09	9588-602-1107	ND
2018-07-09	9588-603-1140	1.30 ppb
2018-07-09	9588-604-0945	1.20 ppb
2018-07-09	9588-605-1006	ND
2018-07-09	9588-606-1120	2.00 ppb
2018-07-09	9588-607-1050	1.30 ppb
2018-07-09	9588-608-1030	ND
2018-10-09	9588-601-1414	1.80 ppb
2018-10-09	9588-602-1112	1.40 ppb
2018-10-09	9588-603-1349	2.20 ppb
2018-10-09	9588-604-0718	1.80 ppb
2018-10-09	9588-605-0756	1.80 ppb
2018-10-09	9588-606-1246	2.90 ppb
2018-10-09	9588-607-1057	2.10 ppb
2018-10-09	9588-608-0952	1.80 ppb
2019-01-09	9588-601-1147	1.40 ppb
2019-01-09	9588-602-1055	1.50 ppb
2019-01-09	9588-603-1131	1.60 ppb
2019-01-09	9588-604-0800	1.60 ppb
2019-01-09	9588-605-0911	1.50 ppb
2019-01-09	9588-606-1110	1.50 ppb
2019-01-09	9588-607-1005	1.20 ppb
2019-01-09	9588-608-0937	1.40 ppb
2019-04-04	9588-601-0920	4.20 ppb
2019-04-04	9588-602-0820	4.60 ppb
2019-04-04	9588-603-0900	5.10 ppb
2019-04-04	9588-604-0700	4.50 ppb
2019-04-04	9588-605-0720	4.60 ppb
2019-04-04	9588-606-0840	4.40 ppb
2019-04-04	9588-607-0800	12.0 ppb
2019-04-04	9588-608-0740	6.10 ppb
2019-07-08	9588-601-1210	1.000 ppb
2019-07-08	9588-602-1055	ND
2019-07-08	9588-603-1145	1.40 ppb
2019-07-08	9588-604-0930	ND
2019-07-08	9588-605-0950	ND
2019-07-08	9588-606-1120	1.70 ppb
2019-07-08	9588-607-1035	2.00 ppb
2019-07-08	9588-608-1015	2.80 ppb
2019-10-07	9588-601-1210	ND
2019-10-07	9588-602-1055	ND
2019-10-07	9588-603-1145	ND
2019-10-07	9588-604-0915	ND
2019-10-07	9588-605-0940	ND
2019-10-07	9588-606-1120	ND
2019-10-07	9588-607-1035	ND
2019-10-07	9588-608-1015	ND