Trichloroacetic acid

Oshkosh Waterworks

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

193

Samples

Samples exceeding legal limit (MCL)

116

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	0.612 ppb	25	7	ND - 3.10 ppb
2015	0.0688 ppb	32	2	ND - 1.20 ppb
2016	0.325 ppb	32	11	ND - 1.30 ppb
2017	0.525 ppb	32	24	ND - 0.800 ppb
2018	0.603 ppb	32	32	0.500 ppb - 0.800 ppb
2019	0.688 ppb	40	40	0.500 ppb - 0.940 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
2014-01-21	2960497-98	ND
2014-01-21	2960493-94	ND
2014-01-21	2960504-05	ND
2014-01-21	2960491-92	ND
2014-01-21	2960500-01	ND
2014-01-21	2960495-96	ND
2014-01-21	2960502-03	ND
2014-01-21	2960506-07	ND
2014-04-21	3012255-56	ND
2014-04-21	3012262-63	1.000 ppb
2014-04-21	3012253-54	1.20 ppb
2014-04-21	3012260-61	1.40 ppb
2014-04-21	3012258-59	2.50 ppb
2014-04-21	3012264-65	3.00 ppb
2014-04-21	3012251-52	3.10 ppb
2014-04-21	3012249-50	3.10 ppb
2014-09-16	3104758-59	ND
2014-10-20	3126213-14	ND
2014-10-20	3126215-16	ND
2014-10-20	3126219-20	ND
2014-10-20	3126217-18	ND
2014-10-20	3126223-24	ND
2014-10-20	3126211-12	ND
2014-10-20	3126221-22	ND
2014-10-20	3126225-26	ND
2015-01-19	3172448-49	ND
2015-01-19	3172446-47	ND
2015-01-19	3172454-55	ND
2015-01-19	3172450-51	ND
2015-01-19	3172456-57	ND
2015-01-19	3172452-53	ND
2015-01-19	3172458-59	ND
2015-01-19	3172460-61	ND
2015-04-15	3225449-50	ND
2015-04-15	3225451-52	ND
2015-04-15	3225443-44	ND
2015-04-15	3225453-54	ND
2015-04-15	3225457-58	ND
2015-04-15	3225445-46	ND
2015-04-15	3225447-48	ND
2015-04-15	3225455-56	ND
2015-07-20	3282953-54	ND
2015-07-20	3282955-56	ND
2015-07-20	3282947-48	ND
2015-07-20	3282941-42	ND
2015-07-20	3282951-52	ND
2015-07-20	3282945-46	ND
2015-07-20	3282949-50	ND
2015-07-20	3282943-44	ND
2015-10-20	3344400-01	ND
2015-10-20	3344414-15	ND
2015-10-20	3344410-11	ND
2015-10-20	3344404-05	ND
2015-10-20	3344412-13	ND
2015-10-20	3344406-07	ND
2015-10-20	3344408-09	1.000 ppb
2015-10-20	3344402-03	1.20 ppb
2016-01-19	3388406-07	ND
2016-01-19	3388410-11	1.000 ppb
2016-01-19	3388412-13	1.000 ppb
2016-01-19	3388408-09	1.10 ppb
2016-01-19	3388414-15	1.10 ppb
2016-01-19	3388404-05	1.20 ppb
2016-01-19	3388416-17	1.20 ppb
2016-01-19	3388418-19	1.30 ppb
2016-04-19	3433389-90	ND
2016-04-19	3433387-88	ND
2016-04-19	3433381-82	ND
2016-04-19	3433393-94	ND
2016-04-19	3433383-84	ND
2016-04-19	3433391-92	ND
2016-04-19	3433379-80	ND
2016-04-19	3433385-86	ND
2016-07-13	3492772-73	ND
2016-07-13	3492766-67	ND
2016-07-13	3492764-65	ND
2016-07-13	3492776-77	ND
2016-07-13	3492774-75	ND
2016-07-13	3492770-71	ND
2016-07-13	3492762-63	0.500 ppb
2016-07-13	3492768-69	0.500 ppb
2016-10-12	3563964-65	ND
2016-10-12	3563972-73	ND
2016-10-12	3563970-71	ND
2016-10-12	3563968-69	ND
2016-10-12	3563962-63	ND
2016-10-12	3563966-67	ND
2016-10-12	3563960-61	0.700 ppb
2016-10-12	3563958-59	0.800 ppb
2017-01-19	3624223-24	0.600 ppb
2017-01-19	3624225-26	0.700 ppb
2017-01-19	3624213-14	0.700 ppb
2017-01-19	3624217-18	0.700 ppb
2017-01-19	3624219-20	0.700 ppb
2017-01-19	3624227-28	0.700 ppb
2017-01-19	3624215-16	0.700 ppb
2017-01-19	3624221-22	0.700 ppb
2017-04-18	3677029-30	ND
2017-04-18	3677027-28	ND
2017-04-18	3677031-32	ND
2017-04-18	3677035-36	ND
2017-04-18	3677025-26	ND
2017-04-18	3677037-38	ND
2017-04-18	3677033-34	ND
2017-04-18	3677023-24	ND
2017-07-13	3732840-41	0.700 ppb
2017-07-13	3732832-33	0.700 ppb
2017-07-13	3732838-39	0.700 ppb
2017-07-13	3732834-35	0.700 ppb
2017-07-13	3732836-37	0.800 ppb
2017-07-13	3732846-47	0.800 ppb
2017-07-13	3732844-45	0.800 ppb
2017-07-13	3732842-43	0.800 ppb
2017-10-11	3798435-36	0.600 ppb
2017-10-11	3798443-44	0.600 ppb
2017-10-11	3798439-40	0.600 ppb
2017-10-11	3798433-34	0.700 ppb
2017-10-11	3798437-38	0.700 ppb
2017-10-11	3798441-42	0.700 ppb
2017-10-11	3798431-32	0.700 ppb
2017-10-11	3798429-30	0.700 ppb
2018-01-16	3853937-38	0.500 ppb
2018-01-16	3853927-28	0.500 ppb
2018-01-16	3853925-26	0.500 ppb
2018-01-16	3853933-34	0.500 ppb
2018-01-16	3853939-40	0.500 ppb
2018-01-16	3853931-32	0.600 ppb
2018-01-16	3853929-30	0.600 ppb
2018-01-16	3853935-36	0.600 ppb
2018-04-17	3914771-72	0.500 ppb
2018-04-17	3914775-76	0.500 ppb
2018-04-17	3914779-80	0.500 ppb
2018-04-17	3914777-78	0.500 ppb
2018-04-17	3914773-74	0.600 ppb
2018-04-17	3914765-66	0.600 ppb
2018-04-17	3914769-70	0.600 ppb
2018-04-17	3914767-68	0.600 ppb
2018-07-18	3993946-47	0.700 ppb
2018-07-18	3993956-57	0.700 ppb
2018-07-18	3993942-43	0.700 ppb
2018-07-18	3993948-49	0.700 ppb
2018-07-18	3993952-53	0.700 ppb
2018-07-18	3993944-45	0.700 ppb
2018-07-18	3993950-51	0.800 ppb
2018-07-18	3993954-55	0.800 ppb
2018-10-15	4089650-51	0.500 ppb
2018-10-15	4089656-57	0.600 ppb
2018-10-15	4089658-59	0.600 ppb
2018-10-15	4089664-65	0.600 ppb
2018-10-15	4089654-55	0.600 ppb
2018-10-15	4089660-61	0.600 ppb
2018-10-15	4089652-53	0.600 ppb
2018-10-15	4089662-63	0.700 ppb
2019-01-15	4174834-35	0.500 ppb
2019-01-15	4174830-31	0.600 ppb
2019-01-15	4174820-21	0.600 ppb
2019-01-15	4174822-23	0.600 ppb
2019-01-15	4174826-27	0.600 ppb
2019-01-15	4174824-25	0.600 ppb
2019-01-15	4174828-29	0.600 ppb
2019-01-15	1101326	0.670 ppb
2019-01-15	1101323	0.680 ppb
2019-01-15	1101320	0.690 ppb
2019-01-15	1101324	0.690 ppb
2019-01-15	4174832-33	0.700 ppb
2019-01-15	1101319	0.700 ppb
2019-01-15	1101322	0.710 ppb
2019-01-15	1101321	0.710 ppb
2019-01-15	1101325	0.720 ppb
2019-04-16	1115419	0.530 ppb
2019-04-16	1115424	0.560 ppb
2019-04-16	1115423	0.560 ppb
2019-04-16	1115425	0.560 ppb
2019-04-16	1115422	0.590 ppb
2019-04-16	1115421	0.610 ppb
2019-04-16	1115420	0.650 ppb
2019-04-16	1115426	0.680 ppb
2019-07-17	1135256	0.840 ppb
2019-07-17	1135262	0.840 ppb
2019-07-17	1135261	0.860 ppb
2019-07-17	1135260	0.870 ppb
2019-07-17	1135259	0.890 ppb
2019-07-17	1135263	0.890 ppb
2019-07-17	1135258	0.910 ppb
2019-07-17	1135257	0.940 ppb
2019-10-15	1155073	0.610 ppb
2019-10-15	1155080	0.650 ppb
2019-10-15	1155077	0.660 ppb
2019-10-15	1155075	0.670 ppb
2019-10-15	1155076	0.670 ppb
2019-10-15	1155079	0.680 ppb
2019-10-15	1155074	0.710 ppb
2019-10-15	1155078	0.710 ppb