Trichloroacetic acid

California Water Service (CWS) - Bakersfield

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

201

Samples

Samples exceeding legal limit (MCL)

161

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	4.22 ppb	32	18	ND - 20.0 ppb
2015	4.76 ppb	32	21	ND - 17.0 ppb
2016	17.5 ppb	32	28	ND - 31.0 ppb
2017	17.9 ppb	37	33	ND - 43.0 ppb
2018	17.9 ppb	36	33	ND - 38.0 ppb
2019	15.8 ppb	32	28	ND - 33.0 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
2014-01-21	5810-900-1012	1.20 ppb
2014-01-21	5810-901-1315	14.0 ppb
2014-01-21	5810-902-1235	4.70 ppb
2014-01-21	5810-903-1145	ND
2014-01-21	5810-904-1032	1.60 ppb
2014-01-21	5810-905-0930	ND
2014-01-21	5810-906-0956	ND
2014-01-21	5810-907-1200	ND
2014-04-21	5810-900-1651	8.90 ppb
2014-04-21	5810-901-1410	14.0 ppb
2014-04-21	5810-902-1437	20.0 ppb
2014-04-21	5810-903-1502	ND
2014-04-21	5810-904-1616	19.0 ppb
2014-04-21	5810-905-1541	ND
2014-04-21	5810-906-1811	16.0 ppb
2014-04-21	5810-907-1450	ND
2014-07-23	5810-900-1045	1.20 ppb
2014-07-23	5810-901-1305	9.30 ppb
2014-07-23	5810-902-1230	1.40 ppb
2014-07-23	5810-903-1105	ND
2014-07-23	5810-904-1135	1.50 ppb
2014-07-23	5810-905-0935	ND
2014-07-23	5810-906-1020	1.40 ppb
2014-07-23	5810-907-1120	ND
2014-10-23	5810-900-1132	1.30 ppb
2014-10-23	5810-901-1242	16.0 ppb
2014-10-23	5810-902-1147	2.10 ppb
2014-10-23	5810-903-1042	ND
2014-10-23	5810-904-1207	1.50 ppb
2014-10-23	5810-905-1022	ND
2014-10-23	5810-906-1117	ND
2014-10-23	5810-907-1057	ND
2015-01-21	5810-900-1102	8.90 ppb
2015-01-21	5810-901-1352	14.0 ppb
2015-01-21	5810-902-1117	12.0 ppb
2015-01-21	5810-903-1307	ND
2015-01-21	5810-904-1132	2.70 ppb
2015-01-21	5810-905-0947	ND
2015-01-21	5810-906-1042	1.40 ppb
2015-01-21	5810-907-1252	9.10 ppb
2015-04-27	5810-900-1009	1.80 ppb
2015-04-27	5810-901-1245	8.40 ppb
2015-04-27	5810-902-1026	3.80 ppb
2015-04-27	5810-903-1121	ND
2015-04-27	5810-904-1050	5.10 ppb
2015-04-27	5810-905-1347	ND
2015-04-27	5810-906-0935	1.40 ppb
2015-04-27	5810-907-1109	2.00 ppb
2015-07-22	5810-900-1220	2.00 ppb
2015-07-22	5810-901-1310	13.0 ppb
2015-07-22	5810-902-1200	ND
2015-07-22	5810-903-1400	ND
2015-07-22	5810-904-1140	ND
2015-07-22	5810-905-1420	ND
2015-07-22	5810-906-1120	ND
2015-07-22	5810-907-1340	ND
2015-10-19	5810-900-1007	3.00 ppb
2015-10-19	5810-901-1207	17.0 ppb
2015-10-19	5810-902-1036	15.0 ppb
2015-10-19	5810-903-1137	5.30 ppb
2015-10-19	5810-904-1104	16.0 ppb
2015-10-19	5810-905-1501	ND
2015-10-19	5810-906-0947	3.10 ppb
2015-10-19	5810-907-1114	7.40 ppb
2016-01-20	5810-900-1352	13.0 ppb
2016-01-20	5810-901-1015	21.0 ppb
2016-01-20	5810-902-0945	18.0 ppb
2016-01-20	5810-903-0900	9.50 ppb
2016-01-20	5810-904-1402	22.0 ppb
2016-01-20	5810-905-1313	ND
2016-01-20	5810-906-1338	1.60 ppb
2016-01-20	5810-907-0920	12.0 ppb
2016-04-18	5810-900-1120	26.0 ppb
2016-04-18	5810-901-1210	31.0 ppb
2016-04-18	5810-902-1130	24.0 ppb
2016-04-18	5810-903-1300	23.0 ppb
2016-04-18	5810-904-1145	27.0 ppb
2016-04-18	5810-905-0915	ND
2016-04-18	5810-906-1100	24.0 ppb
2016-04-18	5810-907-1240	11.0 ppb
2016-07-18	5810-900-0941	19.0 ppb
2016-07-18	5810-901-1045	22.0 ppb
2016-07-18	5810-902-0951	26.0 ppb
2016-07-18	5810-903-1132	7.60 ppb
2016-07-18	5810-904-1014	25.0 ppb
2016-07-18	5810-905-1226	ND
2016-07-18	5810-906-0925	26.0 ppb
2016-07-18	5810-907-1110	26.0 ppb
2016-10-18	5810-900-1415	23.0 ppb
2016-10-18	5810-901-1150	19.0 ppb
2016-10-18	5810-902-1120	22.0 ppb
2016-10-18	5810-903-1330	18.0 ppb
2016-10-18	5810-904-1055	25.0 ppb
2016-10-18	5810-905-1505	ND
2016-10-18	5810-906-1440	18.0 ppb
2016-10-18	5810-907-1350	20.0 ppb
2017-01-17	5810-900-1024	11.0 ppb
2017-01-17	5810-901-1108	26.0 ppb
2017-01-17	5810-902-1048	16.0 ppb
2017-01-17	5810-903-1303	1.70 ppb
2017-01-17	5810-904-1035	12.0 ppb
2017-01-17	5810-905-0908	ND
2017-01-17	5810-906-0933	11.0 ppb
2017-01-17	5810-907-1128	8.80 ppb
2017-04-17	5810-900-1326	34.0 ppb
2017-04-17	5810-901-1445	38.0 ppb
2017-04-17	5810-902-1354	34.0 ppb
2017-04-17	5810-903-1421	22.0 ppb
2017-04-17	5810-904-1344	36.0 ppb
2017-04-17	5810-905-1249	ND
2017-04-17	5810-906-1313	33.0 ppb
2017-04-17	5810-907-1409	43.0 ppb
2017-05-30	5810-900-1026	29.0 ppb
2017-05-30	5810-901-1148	21.0 ppb
2017-05-30	5810-902-1000	37.0 ppb
2017-05-30	5810-904-1016	23.0 ppb
2017-05-30	5810-907-1315	16.0 ppb
2017-07-17	5810-900-1406	21.0 ppb
2017-07-17	5810-901-1339	8.20 ppb
2017-07-17	5810-902-1252	20.0 ppb
2017-07-17	5810-903-1447	7.00 ppb
2017-07-17	5810-905-1328	ND
2017-07-17	5810-906-1353	21.0 ppb
2017-07-17	5810-907-1310	7.90 ppb
2017-08-02	9590-904-0930	20.0 ppb
2017-10-16	5810-900-1112	24.0 ppb
2017-10-16	5810-901-1430	20.0 ppb
2017-10-16	5810-902-1248	16.0 ppb
2017-10-16	5810-903-1347	3.90 ppb
2017-10-16	5810-904-1139	17.0 ppb
2017-10-16	5810-905-0947	ND
2017-10-16	5810-906-1040	18.0 ppb
2017-10-16	5810-907-1317	7.60 ppb
2018-01-18	5810-900-1050	16.0 ppb
2018-01-18	5810-901-1225	25.0 ppb
2018-01-18	5810-902-1100	18.0 ppb
2018-01-18	5810-903-1305	12.0 ppb
2018-01-18	5810-904-1120	23.0 ppb
2018-01-18	5810-905-0940	17.0 ppb
2018-01-18	5810-906-1035	13.0 ppb
2018-01-18	5810-907-1250	23.0 ppb
2018-04-16	5810-900-1000	30.0 ppb
2018-04-16	5810-901-1130	26.0 ppb
2018-04-16	5810-902-1025	31.0 ppb
2018-04-16	5810-903-1235	24.0 ppb
2018-04-16	5810-904-1045	38.0 ppb
2018-04-16	5810-905-0905	ND
2018-04-16	5810-906-0950	10.00 ppb
2018-04-16	5810-907-1205	31.0 ppb
2018-05-10	5810-902-1400	24.0 ppb
2018-05-10	5810-904-1430	29.0 ppb
2018-05-10	5810-907-1445	4.70 ppb
2018-06-15	9590-026-0945	ND
2018-07-17	5810-900-0930	21.0 ppb
2018-07-17	5810-901-1135	12.0 ppb
2018-07-17	5810-902-0950	17.0 ppb
2018-07-17	5810-903-1105	6.50 ppb
2018-07-17	5810-904-1010	16.0 ppb
2018-07-17	5810-905-0845	ND
2018-07-17	5810-906-0915	13.0 ppb
2018-07-17	5810-907-1040	13.0 ppb
2018-10-16	5810-900-1155	18.0 ppb
2018-10-16	5810-901-1315	17.0 ppb
2018-10-16	5810-902-1200	19.0 ppb
2018-10-16	5810-903-1250	16.0 ppb
2018-10-16	5810-904-1215	22.0 ppb
2018-10-16	5810-905-1110	23.0 ppb
2018-10-16	5810-906-1135	18.0 ppb
2018-10-16	5810-907-1235	19.0 ppb
2019-01-14	5810-900-0945	10.00 ppb
2019-01-14	5810-901-1300	17.0 ppb
2019-01-14	5810-902-1005	8.30 ppb
2019-01-14	5810-903-1050	5.10 ppb
2019-01-14	5810-904-1020	6.80 ppb
2019-01-14	5810-905-0905	ND
2019-01-14	5810-906-0935	5.00 ppb
2019-01-14	5810-907-1035	11.0 ppb
2019-04-15	5810-900-0945	31.0 ppb
2019-04-15	5810-901-1120	33.0 ppb
2019-04-15	5810-902-1000	31.0 ppb
2019-04-15	5810-903-1200	26.0 ppb
2019-04-15	5810-904-1020	31.0 ppb
2019-04-15	5810-905-0845	ND
2019-04-15	5810-906-0930	30.0 ppb
2019-04-15	5810-907-1145	25.0 ppb
2019-07-16	5810-900-1020	21.0 ppb
2019-07-16	5810-901-1140	20.0 ppb
2019-07-16	5810-902-1035	18.0 ppb
2019-07-16	5810-903-1110	26.0 ppb
2019-07-16	5810-904-1050	18.0 ppb
2019-07-16	5810-905-0941	ND
2019-07-16	5810-906-1005	7.10 ppb
2019-07-16	5810-907-1100	20.0 ppb
2019-10-23	5810-900-1139	15.0 ppb
2019-10-23	5810-901-1115	15.0 ppb
2019-10-23	5810-902-1338	14.0 ppb
2019-10-23	5810-903-1041	21.0 ppb
2019-10-23	5810-904-1328	14.0 ppb
2019-10-23	5810-905-1433	ND
2019-10-23	5810-906-1300	6.80 ppb
2019-10-23	5810-907-1054	20.0 ppb