Trichloroacetic acid

City of Lake Charles Water System

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)

100

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	1.10 ppb	32	14	ND - 5.80 ppb
2015	0.433 ppb	32	12	ND - 1.50 ppb
2016	0.125 ppb	32	4	ND - 1.000 ppb
2017	0.289 ppb	32	16	ND - 0.840 ppb
2018	0.661 ppb	32	24	ND - 1.40 ppb
2019	0.971 ppb	32	30	ND - 3.00 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
2014-02-14	L0039713-01	1.20 ppb
2014-02-14	L0039713-02	ND
2014-02-14	L0039713-03	ND
2014-02-14	L0039713-04	ND
2014-02-14	L0039713-01	1.20 ppb
2014-02-14	L0039713-02	ND
2014-02-14	L0039713-03	ND
2014-02-14	L0039713-04	ND
2014-05-15	L0043038-01	2.40 ppb
2014-05-15	L0043038-02	ND
2014-05-15	L0043038-03	5.80 ppb
2014-05-15	L0043038-04	ND
2014-05-15	L0043038-01	2.40 ppb
2014-05-15	L0043038-02	ND
2014-05-15	L0043038-03	5.80 ppb
2014-05-15	L0043038-04	ND
2014-08-13	L0046692-01	1.60 ppb
2014-08-13	L0046692-02	1.20 ppb
2014-08-13	L0046692-03	3.20 ppb
2014-08-13	L0046692-04	2.20 ppb
2014-08-13	L0046692-01	1.60 ppb
2014-08-13	L0046692-02	1.20 ppb
2014-08-13	L0046692-03	3.20 ppb
2014-08-13	L0046692-04	2.20 ppb
2014-11-11	L0050494-01	ND
2014-11-11	L0050494-02	ND
2014-11-11	L0050494-03	ND
2014-11-11	L0050494-04	ND
2014-11-11	L0050494-01	ND
2014-11-11	L0050494-02	ND
2014-11-11	L0050494-03	ND
2014-11-11	L0050494-04	ND
2015-02-12	LA3534-1	ND
2015-02-12	LA3534-2	ND
2015-02-12	LA3534-3	ND
2015-02-12	LA3534-4	ND
2015-02-12	LA3534-1	ND
2015-02-12	LA3534-2	ND
2015-02-12	LA3534-3	ND
2015-02-12	LA3534-4	ND
2015-05-12	LA6929-1	1.30 ppb
2015-05-12	LA6929-2	ND
2015-05-12	LA6929-3	1.10 ppb
2015-05-12	LA6929-4	0.940 ppb
2015-05-12	LA6929-1	1.30 ppb
2015-05-12	LA6929-2	ND
2015-05-12	LA6929-3	1.10 ppb
2015-05-12	LA6929-4	0.940 ppb
2015-08-11	LA10223-1	ND
2015-08-11	LA10223-2	ND
2015-08-11	LA10223-3	ND
2015-08-11	LA10223-4	ND
2015-08-11	LA10223-1	ND
2015-08-11	LA10223-2	ND
2015-08-11	LA10223-3	ND
2015-08-11	LA10223-4	ND
2015-11-10	LA13902-1	ND
2015-11-10	LA13902-2	0.880 ppb
2015-11-10	LA13902-3	1.50 ppb
2015-11-10	LA13902-4	1.20 ppb
2015-11-10	LA13902-1	ND
2015-11-10	LA13902-2	0.880 ppb
2015-11-10	LA13902-3	1.50 ppb
2015-11-10	LA13902-4	1.20 ppb
2016-02-08	LA17014-1	ND
2016-02-08	LA17014-2	ND
2016-02-08	LA17014-3	ND
2016-02-08	LA17014-4	ND
2016-02-08	LA17014-1	ND
2016-02-08	LA17014-2	ND
2016-02-08	LA17014-3	ND
2016-02-08	LA17014-4	ND
2016-05-11	LA20626-1	ND
2016-05-11	LA20626-2	1.000 ppb
2016-05-11	LA20626-3	ND
2016-05-11	LA20626-4	1.000 ppb
2016-05-11	LA20626-1	ND
2016-05-11	LA20626-2	1.000 ppb
2016-05-11	LA20626-3	ND
2016-05-11	LA20626-4	1.000 ppb
2016-08-10	LA24066-1	ND
2016-08-10	LA24066-2	ND
2016-08-10	LA24066-3	ND
2016-08-10	LA24066-4	ND
2016-08-10	LA24066-1	ND
2016-08-10	LA24066-2	ND
2016-08-10	LA24066-3	ND
2016-08-10	LA24066-4	ND
2016-11-10	LA27401-1	ND
2016-11-10	LA27401-2	ND
2016-11-10	LA27401-3	ND
2016-11-10	LA27401-4	ND
2016-11-10	LA27401-1	ND
2016-11-10	LA27401-2	ND
2016-11-10	LA27401-3	ND
2016-11-10	LA27401-4	ND
2017-02-16	35296076001	ND
2017-02-16	35296076002	ND
2017-02-16	35296076003	ND
2017-02-16	35296076004	0.690 ppb
2017-02-16	35296076001	ND
2017-02-16	35296076002	ND
2017-02-16	35296076003	ND
2017-02-16	35296076004	0.690 ppb
2017-05-11	35312127001	0.840 ppb
2017-05-11	35312127002	0.570 ppb
2017-05-11	35312127003	ND
2017-05-11	35312127004	0.570 ppb
2017-05-11	35312127001	0.840 ppb
2017-05-11	35312127002	0.570 ppb
2017-05-11	35312127003	ND
2017-05-11	35312127004	0.570 ppb
2017-08-03	35328360013	ND
2017-08-03	35328360014	ND
2017-08-03	35328360015	ND
2017-08-03	35328360016	ND
2017-08-03	35328360013	ND
2017-08-03	35328360014	ND
2017-08-03	35328360015	ND
2017-08-03	35328360016	ND
2017-11-03	35346176001	0.330 ppb
2017-11-03	35346176002	0.470 ppb
2017-11-03	35346176003	0.550 ppb
2017-11-03	35346176004	0.600 ppb
2017-11-03	35346176001	0.330 ppb
2017-11-03	35346176002	0.470 ppb
2017-11-03	35346176003	0.550 ppb
2017-11-03	35346176004	0.600 ppb
2018-02-02	35371890001	ND
2018-02-02	35371890002	0.790 ppb
2018-02-02	35371890003	0.840 ppb
2018-02-02	35371890004	0.840 ppb
2018-02-02	35371890001	ND
2018-02-02	35371890002	0.790 ppb
2018-02-02	35371890003	0.840 ppb
2018-02-02	35371890004	0.840 ppb
2018-05-11	35391908001	1.20 ppb
2018-05-11	35391908002	1.40 ppb
2018-05-11	35391908003	0.990 ppb
2018-05-11	35391908004	0.900 ppb
2018-05-11	35391908001	1.20 ppb
2018-05-11	35391908002	1.40 ppb
2018-05-11	35391908003	0.990 ppb
2018-05-11	35391908004	0.900 ppb
2018-08-02	35408696001	ND
2018-08-02	35408696002	ND
2018-08-02	35408696003	ND
2018-08-02	35408696004	0.940 ppb
2018-08-02	35408696001	ND
2018-08-02	35408696002	ND
2018-08-02	35408696003	ND
2018-08-02	35408696004	0.940 ppb
2018-11-08	35430426001	0.640 ppb
2018-11-08	35430426002	0.460 ppb
2018-11-08	35430426003	0.690 ppb
2018-11-08	35430426004	0.890 ppb
2018-11-08	35430426001	0.640 ppb
2018-11-08	35430426002	0.460 ppb
2018-11-08	35430426003	0.690 ppb
2018-11-08	35430426004	0.890 ppb
2019-02-14	35448809001	0.630 ppb
2019-02-14	35448809002	0.410 ppb
2019-02-14	35448809003	0.440 ppb
2019-02-14	35448809004	0.960 ppb
2019-02-14	35448809001	0.630 ppb
2019-02-14	35448809002	0.410 ppb
2019-02-14	35448809003	0.440 ppb
2019-02-14	35448809004	0.960 ppb
2019-05-15	35469459001	0.780 ppb
2019-05-15	35469459002	0.630 ppb
2019-05-15	35469459003	ND
2019-05-15	35469459004	0.860 ppb
2019-05-15	35469459001	0.780 ppb
2019-05-15	35469459002	0.630 ppb
2019-05-15	35469459003	ND
2019-05-15	35469459004	0.860 ppb
2019-08-02	35487036001	0.840 ppb
2019-08-02	35487036002	2.40 ppb
2019-08-02	35487036003	3.00 ppb
2019-08-02	35487036004	1.40 ppb
2019-08-02	35487036001	0.840 ppb
2019-08-02	35487036002	2.40 ppb
2019-08-02	35487036003	3.00 ppb
2019-08-02	35487036004	1.40 ppb
2019-11-07	35510861001	0.550 ppb
2019-11-07	35510861002	0.650 ppb
2019-11-07	35510861003	0.890 ppb
2019-11-07	35510861004	1.10 ppb
2019-11-07	35510861001	0.550 ppb
2019-11-07	35510861002	0.650 ppb
2019-11-07	35510861003	0.890 ppb
2019-11-07	35510861004	1.10 ppb