Trichloroacetic acid

Newark Water Department

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

288

Samples

Samples exceeding legal limit (MCL)

276

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	21.2 ppb	48	47	ND - 37.7 ppb
2015	20.7 ppb	48	48	1.06 ppb - 39.4 ppb
2016	20.5 ppb	48	47	ND - 36.3 ppb
2017	20.0 ppb	48	44	ND - 39.9 ppb
2018	38.2 ppb	48	44	ND - 78.3 ppb
2019	26.9 ppb	48	46	ND - 54.9 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
2014-03-11	340313045	20.2 ppb
2014-03-11	340313049	22.4 ppb
2014-03-11	340313047	20.3 ppb
2014-03-11	340313051	21.4 ppb
2014-03-11	340313053	19.3 ppb
2014-03-11	340313043	27.4 ppb
2014-03-11	340313041	1.80 ppb
2014-03-11	340313039	23.5 ppb
2014-03-11	340313037	31.5 ppb
2014-03-11	340313035	25.1 ppb
2014-03-11	340313033	21.9 ppb
2014-03-11	340313031	22.4 ppb
2014-06-10	340611050	37.7 ppb
2014-06-10	340611054	22.1 ppb
2014-06-10	340611052	29.7 ppb
2014-06-10	340611056	33.0 ppb
2014-06-10	340611058	27.3 ppb
2014-06-10	340611048	ND
2014-06-10	340611046	16.7 ppb
2014-06-10	340611044	22.8 ppb
2014-06-10	340611042	24.8 ppb
2014-06-10	340611040	27.5 ppb
2014-06-10	340611038	31.5 ppb
2014-06-10	340611036	33.5 ppb
2014-09-10	340910065	18.3 ppb
2014-09-10	340910069	16.3 ppb
2014-09-10	340910067	17.4 ppb
2014-09-10	340910082	17.3 ppb
2014-09-10	340910084	16.6 ppb
2014-09-10	340910063	17.7 ppb
2014-09-10	340910061	19.4 ppb
2014-09-10	340910079	16.1 ppb
2014-09-10	340910077	19.2 ppb
2014-09-10	340910075	18.1 ppb
2014-09-10	340910073	17.4 ppb
2014-09-10	340910071	18.1 ppb
2014-12-10	341210051	23.3 ppb
2014-12-10	341210055	22.3 ppb
2014-12-10	341210053	20.9 ppb
2014-12-10	341210057	19.7 ppb
2014-12-10	341210059	20.5 ppb
2014-12-10	341210049	16.9 ppb
2014-12-10	341210047	16.7 ppb
2014-12-10	341210045	19.4 ppb
2014-12-10	341210043	18.0 ppb
2014-12-10	341210041	22.7 ppb
2014-12-10	341210039	21.8 ppb
2014-12-10	341210037	20.9 ppb
2015-03-11	350311065	14.8 ppb
2015-03-11	350311069	9.20 ppb
2015-03-11	350311067	12.0 ppb
2015-03-11	350311072	9.50 ppb
2015-03-11	350311074	14.9 ppb
2015-03-11	350311063	15.0 ppb
2015-03-11	350311061	18.3 ppb
2015-03-11	350311059	16.3 ppb
2015-03-11	350311057	16.2 ppb
2015-03-11	350311055	15.4 ppb
2015-03-11	350311053	17.1 ppb
2015-03-11	350311051	13.8 ppb
2015-06-10	350610062	30.0 ppb
2015-06-10	350610066	29.9 ppb
2015-06-10	350610064	25.0 ppb
2015-06-10	350610068	25.7 ppb
2015-06-10	350610070A	21.0 ppb
2015-06-10	350610060	22.5 ppb
2015-06-10	350610058	19.3 ppb
2015-06-10	350610056	23.2 ppb
2015-06-10	350610054	27.6 ppb
2015-06-10	350610052	24.2 ppb
2015-06-10	350610050	22.5 ppb
2015-06-10	350610048	25.4 ppb
2015-09-10	5090326-12	13.4 ppb
2015-09-10	5090326-11	14.2 ppb
2015-09-10	5090326-10	16.5 ppb
2015-09-10	5090326-09	18.7 ppb
2015-09-10	5090326-08	18.3 ppb
2015-09-10	5090326-07	15.4 ppb
2015-09-10	5090326-06	9.36 ppb
2015-09-10	5090326-05	17.6 ppb
2015-09-10	5090326-04	15.8 ppb
2015-09-10	5090326-03	13.4 ppb
2015-09-10	5090326-02	15.5 ppb
2015-09-10	5090326-01	10.8 ppb
2015-12-10	L5960904-9	34.1 ppb
2015-12-10	L5960904-12	33.4 ppb
2015-12-10	L5960904-11	33.6 ppb
2015-12-10	L5960904-10	39.4 ppb
2015-12-10	L5960904-6	6.53 ppb
2015-12-10	L5960904-8	32.7 ppb
2015-12-10	L5960904-1	19.8 ppb
2015-12-10	L5960904-4	1.06 ppb
2015-12-10	L5960904-3	37.9 ppb
2015-12-10	L5960904-7	33.1 ppb
2015-12-10	L5960904-5	37.3 ppb
2015-12-10	L5960904-2	34.6 ppb
2016-03-10	360310122	23.5 ppb
2016-03-10	360310126	22.0 ppb
2016-03-10	360310124	23.0 ppb
2016-03-10	360310128	23.8 ppb
2016-03-10	360310130	23.6 ppb
2016-03-10	360310120	19.5 ppb
2016-03-10	360310118	16.8 ppb
2016-03-10	360310116	ND
2016-03-10	360310114	25.2 ppb
2016-03-10	360310112	19.2 ppb
2016-03-10	360310110	31.9 ppb
2016-03-10	360310108	18.6 ppb
2016-06-10	360610039	17.8 ppb
2016-06-10	360610043	18.7 ppb
2016-06-10	360610041	25.9 ppb
2016-06-10	360610045	23.8 ppb
2016-06-10	360610047	2.32 ppb
2016-06-10	360610037	26.4 ppb
2016-06-10	360610035	21.9 ppb
2016-06-10	360610033	20.1 ppb
2016-06-10	360610031	21.8 ppb
2016-06-10	360610029	8.21 ppb
2016-06-10	360610027	18.2 ppb
2016-06-10	360610025	20.4 ppb
2016-09-12	360912048	22.6 ppb
2016-09-12	360912052	19.8 ppb
2016-09-12	360912050	18.9 ppb
2016-09-12	360912054	15.2 ppb
2016-09-12	360912056	2.02 ppb
2016-09-12	360912046	23.2 ppb
2016-09-12	360912044	7.81 ppb
2016-09-12	360912041	18.9 ppb
2016-09-12	360912039	15.4 ppb
2016-09-12	360912037	20.8 ppb
2016-09-12	360912035	23.6 ppb
2016-09-12	360912033	20.9 ppb
2016-12-09	361209080	25.1 ppb
2016-12-09	361209084	20.9 ppb
2016-12-09	361209082	26.6 ppb
2016-12-09	361209086	18.8 ppb
2016-12-09	361209088	27.0 ppb
2016-12-09	361209078	29.2 ppb
2016-12-09	361209076	27.4 ppb
2016-12-09	361209074	29.5 ppb
2016-12-09	361209072	17.2 ppb
2016-12-09	361209070	25.0 ppb
2016-12-09	361209068	36.3 ppb
2016-12-09	361209066	21.1 ppb
2017-03-10	370310041	32.2 ppb
2017-03-10	370310045	32.2 ppb
2017-03-10	370310043	26.5 ppb
2017-03-10	370310047	39.9 ppb
2017-03-10	370310049	39.4 ppb
2017-03-10	370310039	31.0 ppb
2017-03-10	370310037	19.8 ppb
2017-03-10	370310035	25.1 ppb
2017-03-10	370310033	26.2 ppb
2017-03-10	370310031	31.8 ppb
2017-03-10	370310029	27.3 ppb
2017-03-10	370310027	30.0 ppb
2017-06-09	370609062	19.5 ppb
2017-06-09	370609066	26.2 ppb
2017-06-09	370609064	23.7 ppb
2017-06-09	370609068	32.3 ppb
2017-06-09	370609070	33.7 ppb
2017-06-09	370609060	18.3 ppb
2017-06-09	370609058	ND
2017-06-09	370609056	31.0 ppb
2017-06-09	370609054	15.6 ppb
2017-06-09	370609052	17.7 ppb
2017-06-09	370609050	25.0 ppb
2017-06-09	370609048	23.5 ppb
2017-09-08	370908061	13.1 ppb
2017-09-08	370908065	10.2 ppb
2017-09-08	370908063	11.0 ppb
2017-09-08	370908067	7.51 ppb
2017-09-08	370908069	5.51 ppb
2017-09-08	370908059	8.67 ppb
2017-09-08	370908057	ND
2017-09-08	370908055	ND
2017-09-08	370908053	10.2 ppb
2017-09-08	370908051	11.8 ppb
2017-09-08	370908049	13.6 ppb
2017-09-08	370908047	11.0 ppb
2017-12-11	371211061	18.1 ppb
2017-12-11	371211065	24.3 ppb
2017-12-11	371211063	20.4 ppb
2017-12-11	371211067	19.7 ppb
2017-12-11	371211069	16.3 ppb
2017-12-11	371211059	15.0 ppb
2017-12-11	371211057	ND
2017-12-11	371211055	23.1 ppb
2017-12-11	371211053	26.8 ppb
2017-12-11	371211051	19.6 ppb
2017-12-11	371211049	24.8 ppb
2017-12-11	371211047	22.4 ppb
2018-03-09	380309129	11.4 ppb
2018-03-09	380309133	16.4 ppb
2018-03-09	380309131	14.2 ppb
2018-03-09	380309135	12.8 ppb
2018-03-09	380309137	12.0 ppb
2018-03-09	380309127	16.2 ppb
2018-03-09	380309125	ND
2018-03-09	380309123	18.0 ppb
2018-03-09	380309121	14.1 ppb
2018-03-09	380309119	17.8 ppb
2018-03-09	380309117	18.0 ppb
2018-03-09	380309115	14.1 ppb
2018-06-07	380608082	71.0 ppb
2018-06-07	380608086	78.3 ppb
2018-06-07	380608084	66.6 ppb
2018-06-07	380608088	73.1 ppb
2018-06-07	380608090	36.4 ppb
2018-06-07	380608080	54.2 ppb
2018-06-07	380608078	ND
2018-06-07	380608076	73.6 ppb
2018-06-07	380608074	71.0 ppb
2018-06-07	380608072	74.4 ppb
2018-06-07	380608070	54.3 ppb
2018-06-07	380608068	62.7 ppb
2018-09-07	380907121	55.3 ppb
2018-09-07	380907125	52.8 ppb
2018-09-07	380907123	46.6 ppb
2018-09-07	380907127	54.6 ppb
2018-09-07	380907129	43.9 ppb
2018-09-07	380907119	48.0 ppb
2018-09-07	380907117	ND
2018-09-07	380907115	52.3 ppb
2018-09-07	380907113	49.6 ppb
2018-09-07	380907111	52.9 ppb
2018-09-07	380907109	43.0 ppb
2018-09-12	380912011	7.86 ppb
2018-12-10	7073832004-HAA	43.0 ppb
2018-12-10	7073832012-HAA	40.8 ppb
2018-12-10	7073832011-HAA	42.4 ppb
2018-12-10	7073832005-HAA	45.5 ppb
2018-12-10	7073832001-HAA	39.7 ppb
2018-12-10	7073832003-HAA	37.7 ppb
2018-12-10	7073832006-HAA	ND
2018-12-10	7073832008-HAA	36.8 ppb
2018-12-10	7073832009-HAA	38.1 ppb
2018-12-10	7073832002-HAA	39.7 ppb
2018-12-10	7073832010-HAA	43.9 ppb
2018-12-10	7073832007-HAA	39.4 ppb
2019-03-11	390311079.2	38.5 ppb
2019-03-11	390311081.2	36.9 ppb
2019-03-11	390311080.2	38.0 ppb
2019-03-11	390311082.2	33.0 ppb
2019-03-11	390311083.2	18.8 ppb
2019-03-11	390311078.2	16.4 ppb
2019-03-11	390311077.2	10.7 ppb
2019-03-11	390311076.2	29.0 ppb
2019-03-11	390311075.2	31.5 ppb
2019-03-11	390311074.2	37.1 ppb
2019-03-11	390311073.2	34.7 ppb
2019-03-11	390311072.2	34.7 ppb
2019-06-19	390619084.2	50.8 ppb
2019-06-19	390619078.2	50.5 ppb
2019-06-19	390619077.2	48.3 ppb
2019-06-19	390619075.2	54.9 ppb
2019-06-19	390619081.2	19.2 ppb
2019-06-19	390619083.2	22.1 ppb
2019-06-19	390619082.2	1.51 ppb
2019-06-19	390619079.2	48.4 ppb
2019-06-19	390619073.2	42.7 ppb
2019-06-19	390619074.2	50.5 ppb
2019-06-19	390619080.2	46.8 ppb
2019-06-19	390619076.2	50.2 ppb
2019-09-24	390924134.2	17.8 ppb
2019-09-24	390924136.2	17.9 ppb
2019-09-24	390924135.2	17.9 ppb
2019-09-24	390924137.2	17.8 ppb
2019-09-24	390924138.2	ND
2019-09-24	390924133.2	16.2 ppb
2019-09-24	390924132.2	ND
2019-09-24	390924131.2	1.30 ppb
2019-09-24	390924130.2	20.9 ppb
2019-09-24	390924129.2	19.8 ppb
2019-09-24	390924128.2	24.4 ppb
2019-09-24	390924127.2	19.2 ppb
2019-12-17	391217102.2A	25.9 ppb
2019-12-17	391217104.2A	25.1 ppb
2019-12-17	391217105.2	21.5 ppb
2019-12-17	391217106.2	16.7 ppb
2019-12-17	391217101.2A	18.1 ppb
2019-12-17	391217100.2A	24.9 ppb
2019-12-17	391217099.2A	27.8 ppb
2019-12-17	391217098.2A	23.6 ppb
2019-12-17	391217097.2A	20.5 ppb
2019-12-17	391217096.2A	24.3 ppb
2019-12-18	391218097.2	19.5 ppb
2019-12-20	391220034.2A	23.2 ppb