Trichloroacetic acid

City of Durham

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)

277

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	10.5 ppb	48	37	ND - 20.0 ppb
2015	11.6 ppb	48	48	7.70 ppb - 18.0 ppb
2016	12.9 ppb	48	48	10.00 ppb - 20.0 ppb
2017	13.2 ppb	48	48	1.30 ppb - 25.0 ppb
2018	17.4 ppb	48	48	3.70 ppb - 24.0 ppb
2019	14.2 ppb	48	48	1.70 ppb - 34.0 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
2014-02-11	C400987-03	16.0 ppb
2014-02-11	C400987-04	15.0 ppb
2014-02-11	C400987-05RE1	14.0 ppb
2014-02-11	C400987-06	7.40 ppb
2014-02-11	C400987-07RE1	13.0 ppb
2014-02-11	C400987-08	19.0 ppb
2014-02-11	C400987-09	19.0 ppb
2014-02-11	C400987-10	18.0 ppb
2014-02-11	C400987-11	19.0 ppb
2014-02-11	C400987-12	19.0 ppb
2014-02-11	C400987-13	15.0 ppb
2014-02-11	C400987-14	20.0 ppb
2014-05-13	C405354-03RE1	13.0 ppb
2014-05-13	C405354-04RE1	13.0 ppb
2014-05-13	C405354-05RE1	12.0 ppb
2014-05-13	C405354-06	9.20 ppb
2014-05-13	C405354-07RE1	11.0 ppb
2014-05-13	C405354-08	8.90 ppb
2014-05-13	C405354-09RE1	12.0 ppb
2014-05-13	C405354-10	9.90 ppb
2014-05-13	C405354-11	8.50 ppb
2014-05-13	C405354-12RE1	12.0 ppb
2014-05-13	C405354-13	12.0 ppb
2014-05-13	C405354-14	9.90 ppb
2014-08-12	C409625-03RE1	16.0 ppb
2014-08-12	C409625-04	14.0 ppb
2014-08-12	C409625-05	13.0 ppb
2014-08-12	C409625-06	15.0 ppb
2014-08-12	C409625-07	14.0 ppb
2014-08-12	C409625-08	13.0 ppb
2014-08-12	C409625-09	12.0 ppb
2014-08-12	C409625-10	13.0 ppb
2014-08-12	C409625-11	15.0 ppb
2014-08-12	C409625-12	14.0 ppb
2014-08-12	C409625-13	11.0 ppb
2014-08-12	C409625-14	16.0 ppb
2014-11-11	C414066-03	14.0 ppb
2014-11-11	C414066-13	ND
2014-11-11	C414066-14	ND
2014-11-11	C414066-04	ND
2014-11-11	C414066-05	ND
2014-11-11	C414066-06	ND
2014-11-11	C414066-07	ND
2014-11-11	C414066-08	ND
2014-11-11	C414066-09	ND
2014-11-11	C414066-10	ND
2014-11-11	C414066-11	ND
2014-11-11	C414066-12	ND
2015-02-10		9.80 ppb
2015-02-10		9.60 ppb
2015-02-10		9.60 ppb
2015-02-10		11.0 ppb
2015-02-10		9.80 ppb
2015-02-10		9.20 ppb
2015-02-10		9.00 ppb
2015-02-10		7.70 ppb
2015-02-10		9.10 ppb
2015-02-10		10.00 ppb
2015-02-10		8.90 ppb
2015-02-10		9.20 ppb
2015-05-12		10.00 ppb
2015-05-12		9.20 ppb
2015-05-12		9.90 ppb
2015-05-12		10.00 ppb
2015-05-12		9.20 ppb
2015-05-12		12.0 ppb
2015-05-12		11.0 ppb
2015-05-12		9.20 ppb
2015-05-12		9.80 ppb
2015-05-12		9.60 ppb
2015-05-12		9.70 ppb
2015-05-12		9.60 ppb
2015-08-10		14.0 ppb
2015-08-10		15.0 ppb
2015-08-10		16.0 ppb
2015-08-10		16.0 ppb
2015-08-10		15.0 ppb
2015-08-10		15.0 ppb
2015-08-10		15.0 ppb
2015-08-10		15.0 ppb
2015-08-10		12.0 ppb
2015-08-10		18.0 ppb
2015-08-10		13.0 ppb
2015-08-10		15.0 ppb
2015-11-11		12.0 ppb
2015-11-11		11.0 ppb
2015-11-11		13.0 ppb
2015-11-11		13.0 ppb
2015-11-11		13.0 ppb
2015-11-11		12.0 ppb
2015-11-11		12.0 ppb
2015-11-11		13.0 ppb
2015-11-11		13.0 ppb
2015-11-11		13.0 ppb
2015-11-11		13.0 ppb
2015-11-11		8.50 ppb
2016-02-09	CZ01069-03	10.00 ppb
2016-02-09	CZ01069-04	12.0 ppb
2016-02-09	CZ01069-05	12.0 ppb
2016-02-09	CZ01069-06	12.0 ppb
2016-02-09	CZ01069-07	12.0 ppb
2016-02-09	CZ01069-08	11.0 ppb
2016-02-09	CZ01069-09	11.0 ppb
2016-02-09	CZ01069-10	12.0 ppb
2016-02-09	CZ01069-11	12.0 ppb
2016-02-09	CZ01069-12	12.0 ppb
2016-02-09	CZ01069-13	12.0 ppb
2016-02-09	CZ01069-14	13.0 ppb
2016-05-11	CZ05502-02	12.0 ppb
2016-05-11	CZ05502-03	11.0 ppb
2016-05-11	CZ05502-04	12.0 ppb
2016-05-11	CZ05502-05	12.0 ppb
2016-05-11	CZ05502-06	12.0 ppb
2016-05-11	CZ05502-07	12.0 ppb
2016-05-11	CZ05502-09	12.0 ppb
2016-05-11	CZ05502-10	11.0 ppb
2016-05-11	CZ05502-11	11.0 ppb
2016-05-11	CZ05502-12	11.0 ppb
2016-05-11	CZ05502-13	11.0 ppb
2016-05-11	CZ05502-14	12.0 ppb
2016-08-09	CZ10772-03	11.0 ppb
2016-08-09	CZ10772-04	12.0 ppb
2016-08-09	CZ10772-05	14.0 ppb
2016-08-09	CZ10772-06	14.0 ppb
2016-08-09	CZ10772-07RE1	17.0 ppb
2016-08-09	CZ10772-08	12.0 ppb
2016-08-09	CZ10772-09	12.0 ppb
2016-08-09	CZ10772-10	18.0 ppb
2016-08-09	CZ10772-11	12.0 ppb
2016-08-09	CZ10772-12	12.0 ppb
2016-08-09	CZ10772-13RE1	20.0 ppb
2016-08-09	CZ10772-14	12.0 ppb
2016-11-08	CZ16179-03	12.0 ppb
2016-11-09	CZ16179-04	14.0 ppb
2016-11-09	CZ16179-05	16.0 ppb
2016-11-09	CZ16179-06	14.0 ppb
2016-11-09	CZ16179-07	13.0 ppb
2016-11-09	CZ16179-08	13.0 ppb
2016-11-09	CZ16179-09	12.0 ppb
2016-11-09	CZ16179-10	18.0 ppb
2016-11-09	CZ16179-11	14.0 ppb
2016-11-09	CZ16179-12	14.0 ppb
2016-11-09	CZ16179-13	18.0 ppb
2016-11-09	CZ16179-14	14.0 ppb
2017-02-15	CA00946-03	12.0 ppb
2017-02-15	CA00946-04	11.0 ppb
2017-02-15	CA00946-05	11.0 ppb
2017-02-15	CA00946-06	12.0 ppb
2017-02-15	CA00946-07	11.0 ppb
2017-02-15	CA00946-08	13.0 ppb
2017-02-15	CA00946-09	12.0 ppb
2017-02-15	CA00946-10	13.0 ppb
2017-02-15	CA00946-11	12.0 ppb
2017-02-15	CA00946-12	11.0 ppb
2017-02-15	CA00946-13	13.0 ppb
2017-02-15	CA00946-14	11.0 ppb
2017-05-08	CA06171-03	13.0 ppb
2017-05-08	CA06171-04	12.0 ppb
2017-05-08	CA06171-05	13.0 ppb
2017-05-08	CA06171-06	13.0 ppb
2017-05-08	CA06171-07	11.0 ppb
2017-05-08	CA06171-08	12.0 ppb
2017-05-08	CA06171-09	12.0 ppb
2017-05-08	CA06171-10	13.0 ppb
2017-05-08	CA06171-11	12.0 ppb
2017-05-08	CA06171-12	11.0 ppb
2017-05-08	CA06171-13	12.0 ppb
2017-05-08	CA06171-14	12.0 ppb
2017-08-08	CA11368-11	13.0 ppb
2017-08-08	CA11368-12	10.00 ppb
2017-08-08	CA11368-13	24.0 ppb
2017-08-08	CA11368-14	13.0 ppb
2017-08-08	CA11368-03	17.0 ppb
2017-08-08	CA11368-04	13.0 ppb
2017-08-08	CA11368-05	14.0 ppb
2017-08-08	CA11368-06	15.0 ppb
2017-08-08	CA11368-07	17.0 ppb
2017-08-08	CA11368-08	19.0 ppb
2017-08-08	CA11368-09	17.0 ppb
2017-08-08	CA11368-10	19.0 ppb
2017-11-14	CA16981-03	1.40 ppb
2017-11-14	CA16981-04	14.0 ppb
2017-11-14	CA16981-05	1.30 ppb
2017-11-14	CA16981-06	15.0 ppb
2017-11-14	CA16981-07	14.0 ppb
2017-11-14	CA16981-08	14.0 ppb
2017-11-14	CA16981-09	14.0 ppb
2017-11-14	CA16981-10	14.0 ppb
2017-11-14	CA16981-11	15.0 ppb
2017-11-14	CA16981-12	13.0 ppb
2017-11-14	CA16981-13RE1	25.0 ppb
2017-11-14	CA16981-14	14.0 ppb
2018-02-13	CB01007-03	11.0 ppb
2018-02-13	CB01007-04	12.0 ppb
2018-02-13	CB01007-05	12.0 ppb
2018-02-13	CB01007-06	11.0 ppb
2018-02-13	CB01007-07	11.0 ppb
2018-02-13	CB01007-08	12.0 ppb
2018-02-13	CB01007-09	14.0 ppb
2018-02-13	CB01007-10	13.0 ppb
2018-02-13	CB01007-11	14.0 ppb
2018-02-13	CB01007-12	11.0 ppb
2018-02-13	CB01007-13	12.0 ppb
2018-02-13	CB01007-14	14.0 ppb
2018-05-08	CB06320-03	21.0 ppb
2018-05-08	CB06320-04	21.0 ppb
2018-05-08	CB06320-05	21.0 ppb
2018-05-08	CB06320-06	18.0 ppb
2018-05-08	CB06320-07	20.0 ppb
2018-05-08	CB06320-08	21.0 ppb
2018-05-08	CB06320-09	19.0 ppb
2018-05-08	CB06320-10	19.0 ppb
2018-05-08	CB06320-11	19.0 ppb
2018-05-08	CB06320-12	18.0 ppb
2018-05-08	CB06320-13	3.70 ppb
2018-05-08	CB06320-14	20.0 ppb
2018-08-14	CB11155-03	22.0 ppb
2018-08-14	CB11155-04	21.0 ppb
2018-08-14	CB11155-05	24.0 ppb
2018-08-14	CB11155-06	21.0 ppb
2018-08-14	CB11155-07	24.0 ppb
2018-08-14	CB11155-08	23.0 ppb
2018-08-14	CB11155-09	22.0 ppb
2018-08-14	CB11155-10	16.0 ppb
2018-08-14	CB11155-11	21.0 ppb
2018-08-14	CB11155-12	23.0 ppb
2018-08-14	CB11155-13	15.0 ppb
2018-08-14	CB11155-14	24.0 ppb
2018-11-12	CB16648-03	19.0 ppb
2018-11-12	CB16648-04	18.0 ppb
2018-11-12	CB16648-05	18.0 ppb
2018-11-12	CB16648-06	16.0 ppb
2018-11-12	CB16648-07	14.0 ppb
2018-11-12	CB16648-08	19.0 ppb
2018-11-12	CB16648-09	21.0 ppb
2018-11-12	CB16648-10	14.0 ppb
2018-11-12	CB16648-11	20.0 ppb
2018-11-12	CB16648-12	19.0 ppb
2018-11-12	CB16648-13	13.0 ppb
2018-11-12	CB16648-14	20.0 ppb
2019-02-12	CC01716-03	11.0 ppb
2019-02-12	CC01716-04	1.70 ppb
2019-02-12	CC01716-05	1.90 ppb
2019-02-12	CC01716-06	9.90 ppb
2019-02-12	CC01716-07	11.0 ppb
2019-02-12	CC01716-08	13.0 ppb
2019-02-12	CC01716-09	11.0 ppb
2019-02-12	CC01716-10	10.00 ppb
2019-02-12	CC01716-11	12.0 ppb
2019-02-12	CC01716-12	13.0 ppb
2019-02-12	CC01716-13	11.0 ppb
2019-02-12	CC01716-14	12.0 ppb
2019-05-14	CC06563-03	9.70 ppb
2019-05-14	CC06563-04	13.0 ppb
2019-05-14	CC06563-05	11.0 ppb
2019-05-14	CC06563-06	11.0 ppb
2019-05-14	CC06563-07	11.0 ppb
2019-05-14	CC06563-08	10.00 ppb
2019-05-14	CC06563-09	10.00 ppb
2019-05-14	CC06563-10	10.00 ppb
2019-05-14	CC06563-11	9.70 ppb
2019-05-14	CC06563-12	10.00 ppb
2019-05-14	CC06563-13	9.80 ppb
2019-05-14	CC06563-14	11.0 ppb
2019-08-13	CC12767-03	24.0 ppb
2019-08-13	CC12767-04RE1	34.0 ppb
2019-08-13	CC12767-05RE1	33.0 ppb
2019-08-13	CC12767-06	23.0 ppb
2019-08-13	CC12767-07	23.0 ppb
2019-08-13	CC12767-08RE1	26.0 ppb
2019-08-13	CC12767-09RE1	29.0 ppb
2019-08-13	CC12767-10	23.0 ppb
2019-08-13	CC12767-11RE1	23.0 ppb
2019-08-13	CC12767-12RE1	25.0 ppb
2019-08-13	CC12767-13RE1	26.0 ppb
2019-08-13	CC12767-14RE1	25.0 ppb
2019-11-12	CC18484-03	11.0 ppb
2019-11-12	CC18484-04	11.0 ppb
2019-11-12	CC18484-05	11.0 ppb
2019-11-12	CC18484-06	6.50 ppb
2019-11-12	CC18484-07	11.0 ppb
2019-11-12	CC18484-08	11.0 ppb
2019-11-12	CC18484-09	11.0 ppb
2019-11-12	CC18484-10	11.0 ppb
2019-11-12	CC18484-11	10.00 ppb
2019-11-12	CC18484-12	12.0 ppb
2019-11-12	CC18484-13	8.80 ppb
2019-11-12	CC18484-14	11.0 ppb