Trichloroacetic acid

City of Asheville

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

192

Samples

Samples exceeding legal limit (MCL)

192

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	14.8 ppb	32	32	9.00 ppb - 20.0 ppb
2015	16.2 ppb	32	32	8.00 ppb - 29.0 ppb
2016	15.0 ppb	32	32	8.00 ppb - 20.0 ppb
2017	18.3 ppb	32	32	10.00 ppb - 33.0 ppb
2018	17.6 ppb	32	32	8.00 ppb - 31.0 ppb
2019	15.7 ppb	32	32	7.00 ppb - 28.0 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
2014-02-10	37729_14-03988	12.0 ppb
2014-02-10	37729_14-03989	18.0 ppb
2014-02-10	37729_14-03990	15.0 ppb
2014-02-10	37729_14-03991	10.00 ppb
2014-02-10	37729_14-03992	17.0 ppb
2014-02-10	37729_14-03993	12.0 ppb
2014-02-10	37729_14-03994	12.0 ppb
2014-02-10	37729_14-03995	18.0 ppb
2014-05-06	37729_14-12613	10.00 ppb
2014-05-06	37729_14-12614	15.0 ppb
2014-05-06	37729_14-12615	13.0 ppb
2014-05-06	37729_14-12616	12.0 ppb
2014-05-06	37729_14-12617	16.0 ppb
2014-05-06	37729_14-12618	11.0 ppb
2014-05-06	37729_14-12619	9.00 ppb
2014-05-06	37729_14-12620	17.0 ppb
2014-08-04	37729_14-23144	14.0 ppb
2014-08-04	37729_14-23145	10.00 ppb
2014-08-04	37729_14-23138	14.0 ppb
2014-08-04	37729_14-23139	13.0 ppb
2014-08-04	37729_14-23140	10.00 ppb
2014-08-04	37729_14-23141	17.0 ppb
2014-08-04	37729_14-23142	12.0 ppb
2014-08-04	37729_14-23143	19.0 ppb
2014-11-05	37729_14-33661	18.0 ppb
2014-11-05	37729_14-33662	19.0 ppb
2014-11-05	37729_14-33663	17.0 ppb
2014-11-05	37729_14-33664	19.0 ppb
2014-11-05	37729_14-33665	19.0 ppb
2014-11-05	37729_14-33666	18.0 ppb
2014-11-05	37729_14-33667	20.0 ppb
2014-11-05	37729_14-33668	19.0 ppb
2015-02-03		18.0 ppb
2015-02-03		13.0 ppb
2015-02-03		8.00 ppb
2015-02-03		13.0 ppb
2015-02-03		15.0 ppb
2015-02-03		16.0 ppb
2015-02-03		15.0 ppb
2015-02-03		14.0 ppb
2015-05-12		16.0 ppb
2015-05-12		13.0 ppb
2015-05-12		9.00 ppb
2015-05-12		14.0 ppb
2015-05-12		12.0 ppb
2015-05-12		11.0 ppb
2015-05-12		16.0 ppb
2015-05-12		12.0 ppb
2015-08-05		10.00 ppb
2015-08-05		10.00 ppb
2015-08-05		10.00 ppb
2015-08-05		11.0 ppb
2015-08-05		13.0 ppb
2015-08-05		18.0 ppb
2015-08-05		18.0 ppb
2015-08-05		16.0 ppb
2015-11-03		26.0 ppb
2015-11-03		20.0 ppb
2015-11-03		24.0 ppb
2015-11-03		29.0 ppb
2015-11-03		22.0 ppb
2015-11-03		26.0 ppb
2015-11-03		26.0 ppb
2015-11-03		24.0 ppb
2016-02-04	37729_16-03660	20.0 ppb
2016-02-04	37729_16-03661	15.0 ppb
2016-02-04	37729_16-03662	8.00 ppb
2016-02-04	37729_16-03663	17.0 ppb
2016-02-04	37729_16-03664	15.0 ppb
2016-02-04	37729_16-03665	20.0 ppb
2016-02-04	37729_16-03666	17.0 ppb
2016-02-04	37729_16-03667	12.0 ppb
2016-05-02	37729_16-13766	10.00 ppb
2016-05-02	37729_16-13767	19.0 ppb
2016-05-02	37729_16-13768	20.0 ppb
2016-05-02	37729_16-13769	16.0 ppb
2016-05-02	37729_16-13770	18.0 ppb
2016-05-02	37729_16-13771	12.0 ppb
2016-05-02	37729_16-13772	14.0 ppb
2016-05-02	37729_16-13773	12.0 ppb
2016-08-03	37729_16-26423	17.0 ppb
2016-08-03	37729_16-26425	12.0 ppb
2016-08-03	37729_16-26426	9.00 ppb
2016-08-03	37729_16-26427	17.0 ppb
2016-08-03	37729_16-26428	10.00 ppb
2016-08-03	37729_16-26429	18.0 ppb
2016-08-03	37729_16-26430	16.0 ppb
2016-08-03	37729_16-26431	11.0 ppb
2016-11-07	37729_16-38893	20.0 ppb
2016-11-07	37729_16-38894	18.0 ppb
2016-11-07	37729_16-38895	17.0 ppb
2016-11-07	37729_16-38896	16.0 ppb
2016-11-07	37729_16-38900	18.0 ppb
2016-11-07	37729_16-38901	11.0 ppb
2016-11-07	37729_16-38908	12.0 ppb
2016-11-07	37729_16-38914	13.0 ppb
2017-02-01	37729_17-03780	15.0 ppb
2017-02-01	37729_17-03781	11.0 ppb
2017-02-01	37729_17-03782	20.0 ppb
2017-02-01	37729_17-03783	15.0 ppb
2017-02-01	37729_17-03784	12.0 ppb
2017-02-01	37729_17-03785	17.0 ppb
2017-02-01	37729_17-03786	14.0 ppb
2017-02-01	37729_17-03787	10.00 ppb
2017-05-08	37729_17-15195	15.0 ppb
2017-05-08	37729_17-15196	11.0 ppb
2017-05-08	37729_17-15197	12.0 ppb
2017-05-08	37729_17-15198	16.0 ppb
2017-05-08	37729_17-15199	11.0 ppb
2017-05-08	37729_17-15200	15.0 ppb
2017-05-08	37729_17-15201	19.0 ppb
2017-05-08	37729_17-15202	10.00 ppb
2017-08-09	37729_17-28471	20.0 ppb
2017-08-09	37729_17-28481	15.0 ppb
2017-08-09	37729_17-28482	17.0 ppb
2017-08-09	37729_17-28483	22.0 ppb
2017-08-09	37729_17-28484	13.0 ppb
2017-08-09	37729_17-28485	21.0 ppb
2017-08-09	37729_17-28486	21.0 ppb
2017-08-09	37729_17-28487	15.0 ppb
2017-11-08	37729_17-42281	30.0 ppb
2017-11-08	37729_17-42282	24.0 ppb
2017-11-08	37729_17-42283	15.0 ppb
2017-11-08	37729_17-42284	33.0 ppb
2017-11-08	37729_17-42285	27.0 ppb
2017-11-08	37729_17-42286	33.0 ppb
2017-11-08	37729_17-42287	31.0 ppb
2017-11-08	37729_17-42288	26.0 ppb
2018-02-13	37729_18-05844	20.0 ppb
2018-02-13	37729_18-05845	15.0 ppb
2018-02-13	37729_18-05846	9.00 ppb
2018-02-13	37729_18-05847	16.0 ppb
2018-02-13	37729_18-05848	14.0 ppb
2018-02-13	37729_18-05849	18.0 ppb
2018-02-13	37729_18-05850	19.0 ppb
2018-02-13	37729_18-05851	15.0 ppb
2018-05-09	37729_18-18806	17.0 ppb
2018-05-09	37729_18-18807	12.0 ppb
2018-05-09	37729_18-18808	8.00 ppb
2018-05-09	37729_18-18809	17.0 ppb
2018-05-09	37729_18-18810	12.0 ppb
2018-05-09	37729_18-18811	19.0 ppb
2018-05-09	37729_18-18812	15.0 ppb
2018-05-09	37729_18-18813	12.0 ppb
2018-08-06	37729_18-31982	20.0 ppb
2018-08-06	37729_18-31983	12.0 ppb
2018-08-06	37729_18-31984	12.0 ppb
2018-08-06	37729_18-31985	18.0 ppb
2018-08-06	37729_18-31986	12.0 ppb
2018-08-06	37729_18-31987	17.0 ppb
2018-08-06	37729_18-31988	17.0 ppb
2018-08-06	37729_18-31989	12.0 ppb
2018-11-05	37729_18-45873	31.0 ppb
2018-11-05	37729_18-45874	21.0 ppb
2018-11-05	37729_18-45875	18.0 ppb
2018-11-05	37729_18-45876	31.0 ppb
2018-11-05	37729_18-45877	20.0 ppb
2018-11-05	37729_18-45878	30.0 ppb
2018-11-05	37729_18-45879	31.0 ppb
2018-11-05	37729_18-45880	22.0 ppb
2019-02-06	37729_19-05662	17.0 ppb
2019-02-06	37729_19-05663	11.0 ppb
2019-02-06	37729_19-05664	7.00 ppb
2019-02-06	37729_19-05665	14.0 ppb
2019-02-06	37729_19-05666	10.00 ppb
2019-02-06	37729_19-05667	13.0 ppb
2019-02-06	37729_19-05668	13.0 ppb
2019-02-06	37729_19-05669	10.00 ppb
2019-05-06	37729_19-18135	8.00 ppb
2019-05-06	37729_19-18136	8.00 ppb
2019-05-06	37729_19-18140	13.0 ppb
2019-05-06	37729_19-18141	14.0 ppb
2019-05-06	37729_19-18142	9.00 ppb
2019-05-06	37729_19-18143	14.0 ppb
2019-05-06	37729_19-18144	17.0 ppb
2019-05-06	37729_19-18145	9.00 ppb
2019-08-06	37729_19-33272	19.0 ppb
2019-08-06	37729_19-33273	16.0 ppb
2019-08-06	37729_19-33274	15.0 ppb
2019-08-06	37729_19-33275	18.0 ppb
2019-08-06	37729_19-33276	14.0 ppb
2019-08-06	37729_19-33277	17.0 ppb
2019-08-06	37729_19-33278	18.0 ppb
2019-08-06	37729_19-33279	12.0 ppb
2019-11-04	37729_19-47095	27.0 ppb
2019-11-04	37729_19-47096	17.0 ppb
2019-11-04	37729_19-47097	22.0 ppb
2019-11-04	37729_19-47098	26.0 ppb
2019-11-04	37729_19-47099	20.0 ppb
2019-11-04	37729_19-47100	28.0 ppb
2019-11-04	37729_19-47101	28.0 ppb
2019-11-04	37729_19-47102	18.0 ppb