Trichloroacetic acid

City of Newport Beach

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

184

Samples

Samples exceeding legal limit (MCL)

103

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	5.15 ppb	32	32	1.20 ppb - 9.30 ppb
2015	2.68 ppb	32	24	ND - 5.20 ppb
2016	1.47 ppb	32	15	ND - 5.00 ppb
2017	1.11 ppb	32	19	ND - 9.10 ppb
2018	0.441 ppb	32	11	ND - 1.40 ppb
2019	0.113 ppb	24	2	ND - 1.40 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
2014-01-08	2706-801-1520	3.50 ppb
2014-01-08	2706-802-1458	3.30 ppb
2014-01-08	2706-803-1447	3.40 ppb
2014-01-08	2706-804-1345	7.20 ppb
2014-01-08	2706-805-1430	4.20 ppb
2014-01-08	2706-806-1400	2.90 ppb
2014-01-08	2706-807-1611	3.70 ppb
2014-01-08	2706-808-1415	3.70 ppb
2014-04-09	2706-801-1427	6.20 ppb
2014-04-09	2706-802-1410	5.90 ppb
2014-04-09	2706-803-1355	6.90 ppb
2014-04-09	2706-804-1250	5.90 ppb
2014-04-09	2706-805-1340	4.60 ppb
2014-04-09	2706-806-1305	6.40 ppb
2014-04-09	2706-807-1507	6.20 ppb
2014-04-09	2706-808-1320	5.60 ppb
2014-07-09	2706-801-1555	8.70 ppb
2014-07-09	2706-802-1540	7.70 ppb
2014-07-09	2706-803-1530	8.00 ppb
2014-07-09	2706-804-1420	8.30 ppb
2014-07-09	2706-805-1514	8.40 ppb
2014-07-09	2706-806-1443	9.30 ppb
2014-07-09	2706-807-1640	8.40 ppb
2014-07-09	2706-808-1458	9.00 ppb
2014-10-08	2706-801-1310	1.80 ppb
2014-10-08	2706-802-1255	1.20 ppb
2014-10-08	2706-803-1240	5.20 ppb
2014-10-08	2706-804-1155	1.70 ppb
2014-10-08	2706-805-1225	2.40 ppb
2014-10-08	2706-806-1205	1.90 ppb
2014-10-08	2706-807-1355	1.60 ppb
2014-10-08	2706-808-1215	1.60 ppb
2015-01-14	2706-801-1337	1.70 ppb
2015-01-14	2706-802-1323	2.00 ppb
2015-01-14	2706-803-1315	2.50 ppb
2015-01-14	2706-804-1215	2.20 ppb
2015-01-14	2706-805-1300	1.80 ppb
2015-01-14	2706-806-1228	1.80 ppb
2015-01-14	2706-807-1425	1.90 ppb
2015-01-14	2706-808-1245	2.10 ppb
2015-04-08	2706-801-1518	4.90 ppb
2015-04-08	2706-802-1505	4.10 ppb
2015-04-08	2706-803-1457	4.60 ppb
2015-04-08	2706-804-1405	4.40 ppb
2015-04-08	2706-805-1442	4.10 ppb
2015-04-08	2706-806-1415	4.60 ppb
2015-04-08	2706-807-1602	4.60 ppb
2015-04-08	2706-808-1430	5.20 ppb
2015-07-08	0007-801-1423	ND
2015-07-08	0007-802-1358	ND
2015-07-08	0007-803-1410	ND
2015-07-08	0007-804-1300	ND
2015-07-08	0007-805-1341	ND
2015-07-08	0007-806-1313	ND
2015-07-08	0007-807-1506	ND
2015-07-08	0007-808-1325	ND
2015-10-14	2706-801-1350	4.10 ppb
2015-10-14	2706-802-1330	3.70 ppb
2015-10-14	2706-803-1340	5.20 ppb
2015-10-14	2706-804-1250	3.90 ppb
2015-10-14	2706-805-1320	3.70 ppb
2015-10-14	2706-806-1300	4.20 ppb
2015-10-14	2706-807-1430	3.90 ppb
2015-10-14	2706-808-1310	4.60 ppb
2016-01-13	2706-801-1540	3.00 ppb
2016-01-13	2706-802-1526	2.40 ppb
2016-01-13	2706-803-1516	3.50 ppb
2016-01-13	2706-804-1410	2.80 ppb
2016-01-13	2706-805-1500	2.30 ppb
2016-01-13	2706-806-1424	2.80 ppb
2016-01-13	2706-807-1620	2.60 ppb
2016-01-13	2706-808-1442	2.80 ppb
2016-04-13	2706-801-1345	ND
2016-04-13	2706-802-1330	ND
2016-04-13	2706-803-1322	ND
2016-04-13	2706-804-1214	ND
2016-04-13	2706-805-1305	ND
2016-04-13	2706-806-1242	ND
2016-04-13	2706-807-1425	ND
2016-04-13	2706-808-1253	ND
2016-07-13	2706-801-1612	ND
2016-07-13	2706-802-1600	4.00 ppb
2016-07-13	2706-803-1553	1.90 ppb
2016-07-13	2706-804-1500	5.00 ppb
2016-07-13	2706-805-1538	2.50 ppb
2016-07-13	2706-806-1515	3.50 ppb
2016-07-13	2706-807-1648	3.20 ppb
2016-07-13	2706-808-1525	4.60 ppb
2016-10-12	2706-801-1325	ND
2016-10-12	2706-802-1312	ND
2016-10-12	2706-803-1305	ND
2016-10-12	2706-804-1210	ND
2016-10-12	2706-805-1250	ND
2016-10-12	2706-806-1220	ND
2016-10-12	2706-807-1417	ND
2016-10-12	2706-808-1235	ND
2017-01-11	0007-801-1330	ND
2017-01-11	0007-802-1317	ND
2017-01-11	0007-803-1310	2.10 ppb
2017-01-11	0007-804-1218	ND
2017-01-11	0007-805-1250	ND
2017-01-11	0007-806-1228	ND
2017-01-11	0007-807-1410	ND
2017-01-11	0007-808-1238	ND
2017-04-12	0007-801-1438	2.30 ppb
2017-04-12	0007-802-1416	1.60 ppb
2017-04-12	0007-803-1427	9.10 ppb
2017-04-12	0007-804-1314	1.30 ppb
2017-04-12	0007-805-1403	1.30 ppb
2017-04-12	0007-806-1326	1.30 ppb
2017-04-12	0007-807-1522	1.20 ppb
2017-04-12	0007-808-1348	1.30 ppb
2017-07-12	0007-801-0756	1.60 ppb
2017-07-12	0007-802-0720	1.50 ppb
2017-07-12	0007-803-0735	1.60 ppb
2017-07-12	0007-804-0602	1.50 ppb
2017-07-12	0007-805-0655	1.10 ppb
2017-07-12	0007-806-0615	1.50 ppb
2017-07-12	0007-807-0924	1.60 ppb
2017-07-12	0007-808-0632	1.50 ppb
2017-10-11	0007-801-1301	ND
2017-10-11	0007-802-1219	ND
2017-10-11	0007-803-1233	ND
2017-10-11	0007-804-1101	ND
2017-10-11	0007-805-1156	1.20 ppb
2017-10-11	0007-806-1117	ND
2017-10-11	0007-807-1411	1.000 ppb
2017-10-11	0007-808-1133	ND
2018-01-10	0007-801-1318	ND
2018-01-10	0007-802-1247	ND
2018-01-10	0007-803-1301	ND
2018-01-10	0007-804-1131	ND
2018-01-10	0007-805-1229	ND
2018-01-10	0007-806-1150	ND
2018-01-10	0007-807-1423	ND
2018-01-10	0007-808-1207	ND
2018-04-11	0007-801-1533	ND
2018-04-11	0007-802-1501	ND
2018-04-11	0007-803-1514	1.30 ppb
2018-04-11	0007-804-1352	ND
2018-04-11	0007-805-1445	1.30 ppb
2018-04-11	0007-806-1406	1.20 ppb
2018-04-11	0007-807-0518	ND
2018-04-11	0007-808-1422	ND
2018-07-11	0007-801-1639	1.20 ppb
2018-07-11	0007-802-1600	1.30 ppb
2018-07-11	0007-803-1616	1.30 ppb
2018-07-11	0007-804-1420	1.20 ppb
2018-07-11	0007-805-1535	1.40 ppb
2018-07-11	0007-806-1439	1.30 ppb
2018-07-11	0007-807-1810	1.30 ppb
2018-07-11	0007-808-1503	1.30 ppb
2018-10-10	0007-801-1625	ND
2018-10-10	0007-802-1452	ND
2018-10-10	0007-803-1512	ND
2018-10-10	0007-804-1304	ND
2018-10-10	0007-805-1428	ND
2018-10-10	0007-806-1328	ND
2018-10-10	0007-807-1740	ND
2018-10-10	0007-808-1350	ND
2019-04-10	0007-801-1550	ND
2019-04-10	0007-802-1510	ND
2019-04-10	0007-803-1528	1.30 ppb
2019-04-10	0007-804-1310	ND
2019-04-10	0007-805-1444	ND
2019-04-10	0007-806-1338	ND
2019-04-10	0007-807-1804	1.40 ppb
2019-04-10	0007-808-1400	ND
2019-08-02	0007-801-0729	ND
2019-08-02	0007-802-0812	ND
2019-08-02	0007-803-0752	ND
2019-08-02	0007-804-0952	ND
2019-08-02	0007-805-0845	ND
2019-08-02	0007-806-0932	ND
2019-08-02	0007-807-0701	ND
2019-08-02	0007-808-0910	ND
2019-10-09	0007-801-0545	ND
2019-10-09	0007-802-0555	ND
2019-10-09	0007-803-0604	ND
2019-10-09	0007-804-0610	ND
2019-10-09	0007-805-0620	ND
2019-10-09	0007-806-0630	ND
2019-10-09	0007-807-0643	ND
2019-10-09	0007-808-0655	ND