Dichloroacetic acid

City of Lake Charles Water System

Dichloroacetic 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)

130

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	1.19 ppb	32	10	ND - 11.0 ppb
2015	0.756 ppb	32	16	ND - 2.10 ppb
2016	0.631 ppb	32	20	ND - 1.30 ppb
2017	0.836 ppb	32	22	ND - 1.70 ppb
2018	1.74 ppb	32	30	ND - 4.50 ppb
2019	1.41 ppb	32	32	0.600 ppb - 2.50 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.2 ppb

The EWG Health Guideline of 0.2 ppb for dichloroacetic 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	ND
2014-02-14	L0039713-02	ND
2014-02-14	L0039713-03	ND
2014-02-14	L0039713-04	ND
2014-02-14	L0039713-01	ND
2014-02-14	L0039713-02	ND
2014-02-14	L0039713-03	ND
2014-02-14	L0039713-04	ND
2014-05-15	L0043038-01	1.60 ppb
2014-05-15	L0043038-02	ND
2014-05-15	L0043038-03	11.0 ppb
2014-05-15	L0043038-04	ND
2014-05-15	L0043038-01	1.60 ppb
2014-05-15	L0043038-02	ND
2014-05-15	L0043038-03	11.0 ppb
2014-05-15	L0043038-04	ND
2014-08-13	L0046692-01	ND
2014-08-13	L0046692-02	ND
2014-08-13	L0046692-03	2.80 ppb
2014-08-13	L0046692-04	1.80 ppb
2014-08-13	L0046692-01	ND
2014-08-13	L0046692-02	ND
2014-08-13	L0046692-03	2.80 ppb
2014-08-13	L0046692-04	1.80 ppb
2014-11-11	L0050494-01	ND
2014-11-11	L0050494-02	ND
2014-11-11	L0050494-03	ND
2014-11-11	L0050494-04	1.90 ppb
2014-11-11	L0050494-01	ND
2014-11-11	L0050494-02	ND
2014-11-11	L0050494-03	ND
2014-11-11	L0050494-04	1.90 ppb
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	1.10 ppb
2015-05-12	LA6929-2	ND
2015-05-12	LA6929-3	1.10 ppb
2015-05-12	LA6929-4	1.000 ppb
2015-05-12	LA6929-1	1.10 ppb
2015-05-12	LA6929-2	ND
2015-05-12	LA6929-3	1.10 ppb
2015-05-12	LA6929-4	1.000 ppb
2015-08-11	LA10223-1	ND
2015-08-11	LA10223-2	ND
2015-08-11	LA10223-3	1.60 ppb
2015-08-11	LA10223-4	ND
2015-08-11	LA10223-1	ND
2015-08-11	LA10223-2	ND
2015-08-11	LA10223-3	1.60 ppb
2015-08-11	LA10223-4	ND
2015-11-10	LA13902-1	1.50 ppb
2015-11-10	LA13902-2	1.60 ppb
2015-11-10	LA13902-3	2.10 ppb
2015-11-10	LA13902-4	2.10 ppb
2015-11-10	LA13902-1	1.50 ppb
2015-11-10	LA13902-2	1.60 ppb
2015-11-10	LA13902-3	2.10 ppb
2015-11-10	LA13902-4	2.10 ppb
2016-02-08	LA17014-1	0.880 ppb
2016-02-08	LA17014-2	ND
2016-02-08	LA17014-3	ND
2016-02-08	LA17014-4	0.980 ppb
2016-02-08	LA17014-1	0.880 ppb
2016-02-08	LA17014-2	ND
2016-02-08	LA17014-3	ND
2016-02-08	LA17014-4	0.980 ppb
2016-05-11	LA20626-1	0.830 ppb
2016-05-11	LA20626-2	1.20 ppb
2016-05-11	LA20626-3	0.840 ppb
2016-05-11	LA20626-4	1.30 ppb
2016-05-11	LA20626-1	0.830 ppb
2016-05-11	LA20626-2	1.20 ppb
2016-05-11	LA20626-3	0.840 ppb
2016-05-11	LA20626-4	1.30 ppb
2016-08-10	LA24066-1	ND
2016-08-10	LA24066-2	0.980 ppb
2016-08-10	LA24066-3	ND
2016-08-10	LA24066-4	0.950 ppb
2016-08-10	LA24066-1	ND
2016-08-10	LA24066-2	0.980 ppb
2016-08-10	LA24066-3	ND
2016-08-10	LA24066-4	0.950 ppb
2016-11-10	LA27401-1	ND
2016-11-10	LA27401-2	ND
2016-11-10	LA27401-3	1.20 ppb
2016-11-10	LA27401-4	0.930 ppb
2016-11-10	LA27401-1	ND
2016-11-10	LA27401-2	ND
2016-11-10	LA27401-3	1.20 ppb
2016-11-10	LA27401-4	0.930 ppb
2017-02-16	35296076001	ND
2017-02-16	35296076002	ND
2017-02-16	35296076003	ND
2017-02-16	35296076004	1.50 ppb
2017-02-16	35296076001	ND
2017-02-16	35296076002	ND
2017-02-16	35296076003	ND
2017-02-16	35296076004	1.50 ppb
2017-05-11	35312127001	1.70 ppb
2017-05-11	35312127002	1.30 ppb
2017-05-11	35312127003	ND
2017-05-11	35312127004	1.60 ppb
2017-05-11	35312127001	1.70 ppb
2017-05-11	35312127002	1.30 ppb
2017-05-11	35312127003	ND
2017-05-11	35312127004	1.60 ppb
2017-08-03	35328360013	ND
2017-08-03	35328360014	1.40 ppb
2017-08-03	35328360015	1.50 ppb
2017-08-03	35328360016	0.990 ppb
2017-08-03	35328360013	ND
2017-08-03	35328360014	1.40 ppb
2017-08-03	35328360015	1.50 ppb
2017-08-03	35328360016	0.990 ppb
2017-11-03	35346176001	0.640 ppb
2017-11-03	35346176002	0.800 ppb
2017-11-03	35346176003	1.000 ppb
2017-11-03	35346176004	0.940 ppb
2017-11-03	35346176001	0.640 ppb
2017-11-03	35346176002	0.800 ppb
2017-11-03	35346176003	1.000 ppb
2017-11-03	35346176004	0.940 ppb
2018-02-02	35371890001	ND
2018-02-02	35371890002	0.710 ppb
2018-02-02	35371890003	0.960 ppb
2018-02-02	35371890004	1.20 ppb
2018-02-02	35371890001	ND
2018-02-02	35371890002	0.710 ppb
2018-02-02	35371890003	0.960 ppb
2018-02-02	35371890004	1.20 ppb
2018-05-11	35391908001	3.70 ppb
2018-05-11	35391908002	4.30 ppb
2018-05-11	35391908003	4.50 ppb
2018-05-11	35391908004	2.60 ppb
2018-05-11	35391908001	3.70 ppb
2018-05-11	35391908002	4.30 ppb
2018-05-11	35391908003	4.50 ppb
2018-05-11	35391908004	2.60 ppb
2018-08-02	35408696001	0.840 ppb
2018-08-02	35408696002	0.960 ppb
2018-08-02	35408696003	1.40 ppb
2018-08-02	35408696004	1.70 ppb
2018-08-02	35408696001	0.840 ppb
2018-08-02	35408696002	0.960 ppb
2018-08-02	35408696003	1.40 ppb
2018-08-02	35408696004	1.70 ppb
2018-11-08	35430426001	0.670 ppb
2018-11-08	35430426002	0.920 ppb
2018-11-08	35430426003	1.60 ppb
2018-11-08	35430426004	1.80 ppb
2018-11-08	35430426001	0.670 ppb
2018-11-08	35430426002	0.920 ppb
2018-11-08	35430426003	1.60 ppb
2018-11-08	35430426004	1.80 ppb
2019-02-14	35448809001	2.40 ppb
2019-02-14	35448809002	1.50 ppb
2019-02-14	35448809003	2.00 ppb
2019-02-14	35448809004	2.50 ppb
2019-02-14	35448809001	2.40 ppb
2019-02-14	35448809002	1.50 ppb
2019-02-14	35448809003	2.00 ppb
2019-02-14	35448809004	2.50 ppb
2019-05-15	35469459001	0.610 ppb
2019-05-15	35469459002	1.80 ppb
2019-05-15	35469459003	1.10 ppb
2019-05-15	35469459004	1.70 ppb
2019-05-15	35469459001	0.610 ppb
2019-05-15	35469459002	1.80 ppb
2019-05-15	35469459003	1.10 ppb
2019-05-15	35469459004	1.70 ppb
2019-08-02	35487036001	0.850 ppb
2019-08-02	35487036002	0.760 ppb
2019-08-02	35487036003	1.30 ppb
2019-08-02	35487036004	1.60 ppb
2019-08-02	35487036001	0.850 ppb
2019-08-02	35487036002	0.760 ppb
2019-08-02	35487036003	1.30 ppb
2019-08-02	35487036004	1.60 ppb
2019-11-07	35510861001	0.880 ppb
2019-11-07	35510861002	0.600 ppb
2019-11-07	35510861003	1.40 ppb
2019-11-07	35510861004	1.50 ppb
2019-11-07	35510861001	0.880 ppb
2019-11-07	35510861002	0.600 ppb
2019-11-07	35510861003	1.40 ppb
2019-11-07	35510861004	1.50 ppb