Dichloroacetic acid

Calleguas Municipal 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

283

Samples

Samples exceeding legal limit (MCL)

191

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	0.0833 ppb	48	2	ND - 2.00 ppb
2015	0.915 ppb	47	13	ND - 5.00 ppb
2016	2.51 ppb	47	47	2.00 ppb - 5.00 ppb
2017	2.62 ppb	47	46	ND - 5.00 ppb
2018	3.19 ppb	47	47	2.00 ppb - 7.00 ppb
2019	4.02 ppb	47	36	ND - 11.0 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
2014-01-07	5867-025-1345	ND
2014-01-07	5867-026-1445	ND
2014-01-07	5867-027-0900	ND
2014-01-07	5867-028-0800	ND
2014-01-07	5867-029-1230	ND
2014-01-07	5867-030-1315	ND
2014-01-07	5867-031-1300	ND
2014-01-07	5867-032-1140	ND
2014-01-07	5867-033-1030	ND
2014-01-07	5867-034-1050	ND
2014-01-07	5867-035-1110	ND
2014-01-07	5867-036-0940	ND
2014-04-08	5867-025-1400	ND
2014-04-08	5867-026-1430	ND
2014-04-08	5867-027-0905	ND
2014-04-08	5867-028-0830	ND
2014-04-08	5867-029-1230	ND
2014-04-08	5867-030-1325	ND
2014-04-08	5867-031-1250	ND
2014-04-08	5867-032-1145	ND
2014-04-08	5867-033-0940	ND
2014-04-08	5867-034-1030	ND
2014-04-08	5867-035-1115	ND
2014-04-08	5867-036-1010	ND
2014-07-08	5867-025-1355	ND
2014-07-08	5867-026-1501	ND
2014-07-08	5867-027-0841	ND
2014-07-08	5867-028-0810	ND
2014-07-08	5867-029-1251	ND
2014-07-08	5867-030-1331	ND
2014-07-08	5867-031-1315	ND
2014-07-08	5867-032-1144	ND
2014-07-08	5867-033-0955	2.00 ppb
2014-07-08	5867-034-1026	ND
2014-07-08	5867-035-1114	ND
2014-07-08	5867-036-0913	2.00 ppb
2014-10-06	5867-025-1127	ND
2014-10-06	5867-026-1030	ND
2014-10-06	5867-027-0842	ND
2014-10-06	5867-028-1500	ND
2014-10-06	5867-029-1221	ND
2014-10-06	5867-030-1208	ND
2014-10-06	5867-031-1240	ND
2014-10-06	5867-032-1310	ND
2014-10-06	5867-033-1420	ND
2014-10-06	5867-034-1352	ND
2014-10-06	5867-035-1331	ND
2014-10-06	5867-036-1440	ND
2015-01-06	5867-025-1018	ND
2015-01-06	5867-026-0945	ND
2015-01-06	5867-027-0830	ND
2015-01-06	5867-028-0800	ND
2015-01-06	5867-029-1143	ND
2015-01-06	5867-030-1045	ND
2015-01-06	5867-031-1105	ND
2015-01-06	5867-032-1214	ND
2015-01-06	5867-033-1350	ND
2015-01-06	5867-034-1320	ND
2015-01-06	5867-035-1257	ND
2015-01-06	5867-036-1420	ND
2015-04-06	5867-025-1327	ND
2015-04-06	5867-026-1403	ND
2015-04-06	5867-027-0855	ND
2015-04-06	5867-028-0810	ND
2015-04-06	5867-029-1208	ND
2015-04-06	5867-030-1243	ND
2015-04-06	5867-031-1225	ND
2015-04-06	5867-032-1130	ND
2015-04-06	5867-033-1011	ND
2015-04-06	5867-034-1035	ND
2015-04-06	5867-035-1056	ND
2015-04-06	5867-036-0925	ND
2015-07-07	5867-025-1301	2.00 ppb
2015-07-07	5867-026-1419	ND
2015-07-07	5867-028-0801	ND
2015-07-07	5867-029-1154	ND
2015-07-07	5867-030-1231	ND
2015-07-07	5867-031-1215	ND
2015-07-07	5867-032-1107	ND
2015-07-07	5867-033-0930	ND
2015-07-07	5867-034-1010	ND
2015-07-07	5867-035-1035	ND
2015-07-07	5867-036-0955	ND
2015-10-12	5867-025-1333	3.00 ppb
2015-10-12	5867-026-1410	3.00 ppb
2015-10-12	5867-027-0900	2.00 ppb
2015-10-12	5867-028-0819	4.00 ppb
2015-10-12	5867-029-1202	3.00 ppb
2015-10-12	5867-030-1252	3.00 ppb
2015-10-12	5867-031-1234	3.00 ppb
2015-10-12	5867-032-1118	3.00 ppb
2015-10-12	5867-033-0954	4.00 ppb
2015-10-12	5867-034-1019	4.00 ppb
2015-10-12	5867-035-1051	4.00 ppb
2015-10-12	5867-036-0935	5.00 ppb
2016-01-11	5867-025-1509	2.00 ppb
2016-01-11	5867-026-1536	2.00 ppb
2016-01-11	5867-027-0830	3.00 ppb
2016-01-11	5867-028-0801	2.00 ppb
2016-01-11	5867-029-1256	3.00 ppb
2016-01-11	5867-030-1331	2.00 ppb
2016-01-11	5867-031-1315	2.00 ppb
2016-01-11	5867-032-1139	2.00 ppb
2016-01-11	5867-033-0912	2.00 ppb
2016-01-11	5867-035-1221	2.00 ppb
2016-01-11	5867-036-0928	2.00 ppb
2016-04-11	5867-025-1339	3.00 ppb
2016-04-11	5867-026-1430	2.00 ppb
2016-04-11	5867-027-1505	5.00 ppb
2016-04-11	5867-028-0756	4.00 ppb
2016-04-11	5867-029-1044	2.00 ppb
2016-04-11	5867-030-1305	2.00 ppb
2016-04-11	5867-031-1231	3.00 ppb
2016-04-11	5867-032-1118	3.00 ppb
2016-04-11	5867-033-0835	2.00 ppb
2016-04-11	5867-034-0930	2.00 ppb
2016-04-11	5867-035-1006	2.00 ppb
2016-04-11	5867-036-0902	3.00 ppb
2016-07-12	5867-025-1322	2.00 ppb
2016-07-12	5867-026-1208	2.00 ppb
2016-07-12	5867-027-0844	2.00 ppb
2016-07-12	5867-028-0800	2.00 ppb
2016-07-12	5867-029-1152	2.00 ppb
2016-07-12	5867-030-1253	2.00 ppb
2016-07-12	5867-031-1222	2.00 ppb
2016-07-12	5867-032-1104	2.00 ppb
2016-07-12	5867-033-0909	2.00 ppb
2016-07-12	5867-034-0952	2.00 ppb
2016-07-12	5867-035-1043	2.00 ppb
2016-07-12	5867-036-0934	2.00 ppb
2016-10-12	5867-025-1326	3.00 ppb
2016-10-12	5867-026-1418	3.00 ppb
2016-10-12	5867-027-0833	3.00 ppb
2016-10-12	5867-028-0802	3.00 ppb
2016-10-12	5867-029-1202	3.00 ppb
2016-10-12	5867-030-1254	3.00 ppb
2016-10-12	5867-031-1239	3.00 ppb
2016-10-12	5867-032-1022	3.00 ppb
2016-10-12	5867-033-0854	3.00 ppb
2016-10-12	5867-034-0930	3.00 ppb
2016-10-12	5867-035-1003	4.00 ppb
2016-10-12	5867-036-0909	3.00 ppb
2017-01-09	5867-025-1400	2.00 ppb
2017-01-09	5867-026-1433	3.00 ppb
2017-01-09	5867-027-0906	2.00 ppb
2017-01-09	5867-028-0832	3.00 ppb
2017-01-09	5867-029-1230	4.00 ppb
2017-01-09	5867-030-1326	3.00 ppb
2017-01-09	5867-031-1311	2.00 ppb
2017-01-09	5867-032-1133	2.00 ppb
2017-01-09	5867-033-0934	2.00 ppb
2017-01-09	5867-034-1002	3.00 ppb
2017-01-09	5867-035-1102	3.00 ppb
2017-01-09	5867-036-1023	4.00 ppb
2017-04-10	5867-025-1324	2.00 ppb
2017-04-10	5867-026-1401	3.00 ppb
2017-04-10	5867-027-0830	ND
2017-04-10	5867-028-0800	2.00 ppb
2017-04-10	5867-029-1157	3.00 ppb
2017-04-10	5867-030-1237	3.00 ppb
2017-04-10	5867-031-1222	2.00 ppb
2017-04-10	5867-032-1110	2.00 ppb
2017-04-10	5867-033-0856	2.00 ppb
2017-04-10	5867-034-1009	2.00 ppb
2017-04-10	5867-035-1043	3.00 ppb
2017-04-10	5867-036-0917	2.00 ppb
2017-07-12	5867-025-1346	2.00 ppb
2017-07-12	5867-026-1310	2.00 ppb
2017-07-12	5867-027-0811	2.00 ppb
2017-07-12	5867-028-0745	2.00 ppb
2017-07-12	5867-029-1152	2.00 ppb
2017-07-12	5867-030-1243	2.00 ppb
2017-07-12	5867-031-1222	2.00 ppb
2017-07-12	5867-032-1113	2.00 ppb
2017-07-12	5867-033-0846	2.00 ppb
2017-07-12	5867-034-0949	2.00 ppb
2017-07-12	5867-035-1043	2.00 ppb
2017-07-12	5867-036-0912	2.00 ppb
2017-10-09	5867-025-1333	4.00 ppb
2017-10-09	5867-026-1305	4.00 ppb
2017-10-09	5867-027-0820	2.00 ppb
2017-10-09	5867-028-0745	4.00 ppb
2017-10-09	5867-029-1141	3.00 ppb
2017-10-09	5867-030-1221	4.00 ppb
2017-10-09	5867-031-1205	4.00 ppb
2017-10-09	5867-032-1110	5.00 ppb
2017-10-09	5867-033-0927	3.00 ppb
2017-10-09	5867-034-0957	3.00 ppb
2017-10-09	5867-035-1037	4.00 ppb
2018-01-08	5867-025-1330	3.00 ppb
2018-01-08	5867-026-1415	3.00 ppb
2018-01-08	5867-027-0900	2.00 ppb
2018-01-08	5867-028-0830	3.00 ppb
2018-01-08	5867-029-1140	4.00 ppb
2018-01-08	5867-030-1255	3.00 ppb
2018-01-08	5867-031-1235	3.00 ppb
2018-01-08	5867-032-1112	3.00 ppb
2018-01-08	5867-033-0920	4.00 ppb
2018-01-08	5867-034-1010	3.00 ppb
2018-01-08	5867-035-1035	4.00 ppb
2018-01-08	5867-036-0950	3.00 ppb
2018-04-09	5867-025-1422	3.00 ppb
2018-04-09	5867-026-1355	5.00 ppb
2018-04-09	5867-027-0840	3.00 ppb
2018-04-09	5867-028-0809	3.00 ppb
2018-04-09	5867-029-1236	4.00 ppb
2018-04-09	5867-030-1324	3.00 ppb
2018-04-09	5867-031-1311	5.00 ppb
2018-04-09	5867-032-1131	4.00 ppb
2018-04-09	5867-033-0915	4.00 ppb
2018-04-09	5867-034-1017	5.00 ppb
2018-04-09	5867-035-1100	7.00 ppb
2018-04-09	5867-036-0940	4.00 ppb
2018-07-09	5867-025-1032	3.00 ppb
2018-07-09	5867-026-0955	3.00 ppb
2018-07-09	5867-027-0820	3.00 ppb
2018-07-09	5867-028-0747	3.00 ppb
2018-07-09	5867-029-1255	2.00 ppb
2018-07-09	5867-030-1150	3.00 ppb
2018-07-09	5867-031-1229	3.00 ppb
2018-07-09	5867-032-1411	3.00 ppb
2018-07-09	5867-033-0850	2.00 ppb
2018-07-09	5867-034-1117	3.00 ppb
2018-07-09	5867-035-1350	3.00 ppb
2018-10-08	5867-025-1306	2.00 ppb
2018-10-08	5867-026-1243	3.00 ppb
2018-10-08	5867-027-0813	3.00 ppb
2018-10-08	5867-028-0738	3.00 ppb
2018-10-08	5867-029-1137	2.00 ppb
2018-10-08	5867-030-1211	2.00 ppb
2018-10-08	5867-031-1155	2.00 ppb
2018-10-08	5867-032-1055	2.00 ppb
2018-10-08	5867-033-0916	3.00 ppb
2018-10-08	5867-034-0957	3.00 ppb
2018-10-08	5867-035-1021	3.00 ppb
2018-10-08	5867-036-0841	3.00 ppb
2019-01-08	5867-025-1412	3.00 ppb
2019-01-08	5867-026-1343	5.00 ppb
2019-01-08	5867-027-0812	7.00 ppb
2019-01-08	5867-028-0739	3.00 ppb
2019-01-08	5867-029-1142	6.00 ppb
2019-01-08	5867-030-1221	4.00 ppb
2019-01-08	5867-031-1209	5.00 ppb
2019-01-08	5867-032-1057	6.00 ppb
2019-01-08	5867-033-0851	6.00 ppb
2019-01-08	5867-034-1004	6.00 ppb
2019-01-08	5867-035-1036	4.00 ppb
2019-01-08	5867-036-0921	7.00 ppb
2019-04-08	5867-025-1346	4.00 ppb
2019-04-08	5867-026-1312	5.00 ppb
2019-04-08	5867-027-0831	4.00 ppb
2019-04-08	5867-028-0752	4.00 ppb
2019-04-08	5867-029-1203	5.00 ppb
2019-04-08	5867-030-1247	4.00 ppb
2019-04-08	5867-031-1231	4.00 ppb
2019-04-08	5867-032-1104	4.00 ppb
2019-04-08	5867-033-0903	5.00 ppb
2019-04-08	5867-034-0954	4.00 ppb
2019-04-08	5867-035-1041	5.00 ppb
2019-04-08	5867-036-0935	4.00 ppb
2019-07-08	5867-025-1417	ND
2019-07-08	5867-026-1330	ND
2019-07-08	5867-027-0837	ND
2019-07-08	5867-028-0810	ND
2019-07-08	5867-029-1222	ND
2019-07-08	5867-030-1306	ND
2019-07-08	5867-031-1247	ND
2019-07-08	5867-032-1117	ND
2019-07-08	5867-033-0923	2.00 ppb
2019-07-08	5867-034-1012	ND
2019-07-08	5867-035-1056	ND
2019-07-08	5867-036-0952	ND
2019-10-07	5867-026-1147	11.0 ppb
2019-10-07	5867-027-0827	4.00 ppb
2019-10-07	5867-028-0753	5.00 ppb
2019-10-07	5867-029-1352	5.00 ppb
2019-10-07	5867-030-1313	6.00 ppb
2019-10-07	5867-031-1331	10.00 ppb
2019-10-07	5867-032-1046	6.00 ppb
2019-10-07	5867-033-0855	7.00 ppb
2019-10-07	5867-034-0957	7.00 ppb
2019-10-07	5867-035-1436	6.00 ppb
2019-10-07	5867-036-0927	6.00 ppb