Trichloroacetic acid

Yorba Linda Water District

Trichloroacetic 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

194

Samples

Samples exceeding legal limit (MCL)

104

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	3.97 ppb	32	32	2.00 ppb - 6.50 ppb
2015	1.84 ppb	32	24	ND - 3.60 ppb
2016	0.424 ppb	34	12	ND - 1.60 ppb
2017	0.756 ppb	32	17	ND - 3.00 ppb
2018	0.609 ppb	32	18	ND - 1.30 ppb
2019	0.0313 ppb	32	1	ND - 1.000 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for trichloroacetic 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
2014-01-06	3761-801-1128	3.20 ppb
2014-01-06	3761-802-1140	3.40 ppb
2014-01-06	3761-803-1050	3.40 ppb
2014-01-06	3761-804-1120	3.20 ppb
2014-01-06	3761-805-1030	3.20 ppb
2014-01-06	3761-806-1107	2.90 ppb
2014-01-06	3761-807-1040	3.20 ppb
2014-01-06	3761-808-1152	3.10 ppb
2014-04-09	3761-801-1205	4.20 ppb
2014-04-09	3761-802-1222	4.50 ppb
2014-04-09	3761-803-1143	4.50 ppb
2014-04-09	3761-804-1212	4.40 ppb
2014-04-09	3761-805-1130	4.30 ppb
2014-04-09	3761-806-1154	4.40 ppb
2014-04-09	3761-807-1137	4.70 ppb
2014-04-09	3761-808-1236	3.90 ppb
2014-07-11	3761-801-1229	3.20 ppb
2014-07-11	3761-802-1254	5.10 ppb
2014-07-11	3761-803-1204	5.90 ppb
2014-07-11	3761-804-1326	5.30 ppb
2014-07-11	3761-805-1144	6.50 ppb
2014-07-11	3761-806-1429	6.40 ppb
2014-07-11	3761-807-1131	6.00 ppb
2014-07-11	3761-808-1348	5.90 ppb
2014-10-09	3761-801-1111	2.10 ppb
2014-10-09	3761-802-1132	2.00 ppb
2014-10-09	3761-803-1049	3.10 ppb
2014-10-09	3761-804-1119	2.10 ppb
2014-10-09	3761-805-1029	3.30 ppb
2014-10-09	3761-806-1100	3.50 ppb
2014-10-09	3761-807-1037	3.30 ppb
2014-10-09	3761-808-1145	2.80 ppb
2015-01-05	3761-801-1437	ND
2015-01-05	3761-802-1458	ND
2015-01-05	3761-803-1045	ND
2015-01-05	3761-804-1445	ND
2015-01-05	3761-805-1025	ND
2015-01-05	3761-806-1425	ND
2015-01-05	3761-807-1031	ND
2015-01-05	3761-808-1515	ND
2015-04-01	3761-801-1121	1.90 ppb
2015-04-01	3761-802-1139	1.40 ppb
2015-04-01	3761-803-1101	3.10 ppb
2015-04-01	3761-804-1127	1.30 ppb
2015-04-01	3761-805-1045	2.20 ppb
2015-04-01	3761-806-1112	2.30 ppb
2015-04-01	3761-807-1052	2.40 ppb
2015-04-01	3761-808-1150	2.90 ppb
2015-07-07	3761-801-1105	3.10 ppb
2015-07-07	3761-802-1120	3.50 ppb
2015-07-07	3761-803-1040	3.60 ppb
2015-07-07	3761-804-1111	3.10 ppb
2015-07-07	3761-805-1025	3.50 ppb
2015-07-07	3761-806-1056	3.60 ppb
2015-07-07	3761-807-1031	3.30 ppb
2015-07-07	3761-808-1208	3.10 ppb
2015-10-09	3761-801-1147	1.30 ppb
2015-10-09	3761-802-1128	1.60 ppb
2015-10-09	3761-803-1210	2.10 ppb
2015-10-09	3761-804-1142	1.70 ppb
2015-10-09	3761-805-1220	1.70 ppb
2015-10-09	3761-806-1157	2.90 ppb
2015-10-09	3761-807-1227	2.10 ppb
2015-10-09	3761-808-1115	1.10 ppb
2016-01-07	3761-801-1247	ND
2016-01-07	3761-802-1308	ND
2016-01-07	3761-803-1227	ND
2016-01-07	3761-804-1252	ND
2016-01-07	3761-805-1135	ND
2016-01-07	3761-806-1237	ND
2016-01-07	3761-807-1145	ND
2016-01-07	3761-808-1318	ND
2016-02-01	3761-802-1235	ND
2016-02-01	3761-804-1225	ND
2016-04-06	3761-801-1150	ND
2016-04-06	3761-802-1210	ND
2016-04-06	3761-803-1055	ND
2016-04-06	3761-804-1158	ND
2016-04-06	3761-805-1035	ND
2016-04-06	3761-806-1135	ND
2016-04-06	3761-807-1045	ND
2016-04-06	3761-808-1220	ND
2016-07-06	3761-801-1137	ND
2016-07-06	3761-802-1151	ND
2016-07-06	3761-803-1112	1.40 ppb
2016-07-06	3761-804-1143	1.000 ppb
2016-07-06	3761-805-1055	1.40 ppb
2016-07-06	3761-806-1127	1.60 ppb
2016-07-06	3761-807-1102	1.40 ppb
2016-07-06	3761-808-1211	1.40 ppb
2016-10-05	3761-801-1052	1.000 ppb
2016-10-05	3761-802-1108	ND
2016-10-05	3761-803-1031	1.000 ppb
2016-10-05	3761-804-1059	ND
2016-10-05	3761-805-1015	1.000 ppb
2016-10-05	3761-806-1042	1.20 ppb
2016-10-05	3761-807-1009	1.000 ppb
2016-10-05	3761-808-1116	1.000 ppb
2017-01-03	3761-801-1054	1.20 ppb
2017-01-03	3761-802-1110	1.20 ppb
2017-01-03	3761-803-1033	1.10 ppb
2017-01-03	3761-804-1101	1.20 ppb
2017-01-03	3761-805-1018	1.20 ppb
2017-01-03	3761-806-1041	1.90 ppb
2017-01-03	3761-807-1025	1.20 ppb
2017-01-03	3761-808-1122	1.50 ppb
2017-04-05	3761-801-1021	ND
2017-04-05	3761-802-1033	ND
2017-04-05	3761-803-1002	ND
2017-04-05	3761-804-1026	ND
2017-04-05	3761-805-0945	3.00 ppb
2017-04-05	3761-806-1011	1.60 ppb
2017-04-05	3761-807-0954	1.40 ppb
2017-04-05	3761-808-1048	ND
2017-07-04	3761-801-0936	1.20 ppb
2017-07-04	3761-802-0951	1.30 ppb
2017-07-04	3761-803-0911	1.20 ppb
2017-07-04	3761-804-0942	1.20 ppb
2017-07-04	3761-805-0855	1.70 ppb
2017-07-04	3761-806-0925	ND
2017-07-04	3761-807-0903	1.10 ppb
2017-07-04	3761-808-1003	ND
2017-10-04	3761-801-1110	ND
2017-10-04	3761-802-1050	ND
2017-10-04	3761-803-1135	ND
2017-10-04	3761-804-1100	ND
2017-10-04	3761-805-1150	ND
2017-10-04	3761-806-1125	ND
2017-10-04	3761-807-1200	ND
2017-10-04	3761-808-1030	ND
2018-01-03	3761-801-1105	ND
2018-01-03	3761-802-1140	ND
2018-01-03	3761-803-1030	1.000 ppb
2018-01-03	3761-804-1115	1.000 ppb
2018-01-03	3761-805-1020	1.000 ppb
2018-01-03	3761-806-1045	1.10 ppb
2018-01-03	3761-807-1010	1.000 ppb
2018-01-03	3761-808-1210	ND
2018-04-04	3761-801-1123	ND
2018-04-04	3761-802-1152	ND
2018-04-04	3761-803-1057	ND
2018-04-04	3761-804-1129	ND
2018-04-04	3761-805-1044	ND
2018-04-04	3761-806-1110	ND
2018-04-04	3761-807-1050	ND
2018-04-04	3761-808-1206	ND
2018-07-03	3761-801-1217	1.000 ppb
2018-07-03	3761-802-1252	1.000 ppb
2018-07-03	3761-803-1156	1.000 ppb
2018-07-03	3761-804-1231	1.000 ppb
2018-07-03	3761-805-1147	1.20 ppb
2018-07-03	3761-806-1206	1.000 ppb
2018-07-03	3761-807-1140	1.000 ppb
2018-07-03	3761-808-1300	1.000 ppb
2018-10-02	3761-801-1543	ND
2018-10-02	3761-802-1532	ND
2018-10-02	3761-803-1611	1.30 ppb
2018-10-02	3761-804-1538	1.000 ppb
2018-10-02	3761-805-1724	1.30 ppb
2018-10-02	3761-806-1557	1.30 ppb
2018-10-02	3761-807-1731	1.30 ppb
2018-10-02	3761-808-1516	ND
2019-01-08	3761-801-1044	ND
2019-01-08	3761-802-1112	ND
2019-01-08	3761-803-1018	ND
2019-01-08	3761-804-1050	ND
2019-01-08	3761-805-0954	ND
2019-01-08	3761-806-1033	ND
2019-01-08	3761-807-1007	ND
2019-01-08	3761-808-1130	ND
2019-04-01	3761-801-1036	ND
2019-04-01	3761-802-1055	ND
2019-04-01	3761-803-1015	ND
2019-04-01	3761-804-1047	ND
2019-04-01	3761-805-0751	ND
2019-04-01	3761-806-1026	ND
2019-04-01	3761-807-1009	ND
2019-04-01	3761-808-1130	ND
2019-07-01	3761-801-1035	ND
2019-07-01	3761-802-1049	ND
2019-07-01	3761-803-1013	ND
2019-07-01	3761-804-1041	ND
2019-07-01	3761-805-0957	1.000 ppb
2019-07-01	3761-806-1024	ND
2019-07-01	3761-807-1004	ND
2019-07-01	3761-808-1102	ND
2019-10-01	3761-801-1017	ND
2019-10-01	3761-802-0959	ND
2019-10-01	3761-803-1053	ND
2019-10-01	3761-804-1010	ND
2019-10-01	3761-805-1112	ND
2019-10-01	3761-806-0928	ND
2019-10-01	3761-807-1119	ND
2019-10-01	3761-808-0941	ND