Monochloroacetic acid

Water Works District #1 of Vermilion

Monochloroacetic 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)

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	1.43 ppb	32	6	ND - 12.0 ppb
2015	5.58 ppb	32	10	ND - 40.3 ppb
2016	3.15 ppb	32	16	ND - 11.6 ppb
2017	0.513 ppb	32	12	ND - 2.00 ppb
2018	0.193 ppb	32	4	ND - 2.10 ppb
2019	0.279 ppb	32	6	ND - 2.30 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 53 ppb

The EWG Health Guideline of 53 ppb for monochloroacetic 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.. This health guideline protects against system toxicity.

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-02-04	L0039482-01	ND
2014-02-04	L0039483-01	ND
2014-02-04	L0039484-01	ND
2014-02-04	L0039485-01	ND
2014-02-04	L0039482-01	ND
2014-02-04	L0039483-01	ND
2014-02-04	L0039484-01	ND
2014-02-04	L0039485-01	ND
2014-05-08	L0042779-01	12.0 ppb
2014-05-08	L0042780-01	6.90 ppb
2014-05-08	L0042782-01	4.00 ppb
2014-05-08	L0042871-01	ND
2014-05-08	L0042779-01	12.0 ppb
2014-05-08	L0042780-01	6.90 ppb
2014-05-08	L0042782-01	4.00 ppb
2014-05-08	L0042871-01	ND
2014-08-04	L0046295-01	ND
2014-08-04	L0046297-01	ND
2014-08-04	L0046298-01	ND
2014-08-04	L0046295-01	ND
2014-08-04	L0046297-01	ND
2014-08-04	L0046298-01	ND
2014-08-07	L0046296-01	ND
2014-08-07	L0046296-01	ND
2014-11-05	L0050278-01	ND
2014-11-05	L0050279-01	ND
2014-11-05	L0050280-01	ND
2014-11-05	L0050281-01	ND
2014-11-05	L0050278-01	ND
2014-11-05	L0050279-01	ND
2014-11-05	L0050280-01	ND
2014-11-05	L0050281-01	ND
2015-02-03	LA3283-1	1.90 ppb
2015-02-03	LA3284-1	ND
2015-02-03	LA3285-1	ND
2015-02-03	LA3286-1	ND
2015-02-03	LA3283-1	1.90 ppb
2015-02-03	LA3284-1	ND
2015-02-03	LA3285-1	ND
2015-02-03	LA3286-1	ND
2015-05-04	LA6543-1	ND
2015-05-04	LA6544-1	ND
2015-05-04	LA6545-1	ND
2015-05-04	LA6546-1	ND
2015-05-04	LA6543-1	ND
2015-05-04	LA6544-1	ND
2015-05-04	LA6545-1	ND
2015-05-04	LA6546-1	ND
2015-08-25	LA10878-1	ND
2015-08-25	LA10879-1	ND
2015-08-25	LA10880-1	28.8 ppb
2015-08-25	LA10882-1	40.3 ppb
2015-08-25	LA10878-1	ND
2015-08-25	LA10879-1	ND
2015-08-25	LA10880-1	28.8 ppb
2015-08-25	LA10882-1	40.3 ppb
2015-11-04	LA13672-1	ND
2015-11-04	LA13674-1	9.50 ppb
2015-11-04	LA13676-1	ND
2015-11-04	LA13678-1	8.80 ppb
2015-11-04	LA13672-1	ND
2015-11-04	LA13674-1	9.50 ppb
2015-11-04	LA13676-1	ND
2015-11-04	LA13678-1	8.80 ppb
2016-02-23	LA17629-1	ND
2016-02-23	LA17630-1	ND
2016-02-23	LA17631-1	ND
2016-02-23	LA17632-1	ND
2016-02-23	LA17629-1	ND
2016-02-23	LA17630-1	ND
2016-02-23	LA17631-1	ND
2016-02-23	LA17632-1	ND
2016-05-23	LA21054-1	ND
2016-05-23	LA21055-1	ND
2016-05-23	LA21056-1	ND
2016-05-23	LA21057-1	ND
2016-05-23	LA21054-1	ND
2016-05-23	LA21055-1	ND
2016-05-23	LA21056-1	ND
2016-05-23	LA21057-1	ND
2016-08-23	LA24511-1	11.6 ppb
2016-08-23	LA24512-1	8.60 ppb
2016-08-23	LA24513-1	10.00 ppb
2016-08-23	LA24514-1	8.20 ppb
2016-08-23	LA24511-1	11.6 ppb
2016-08-23	LA24512-1	8.60 ppb
2016-08-23	LA24513-1	10.00 ppb
2016-08-23	LA24514-1	8.20 ppb
2016-11-21	LA27855-1	2.60 ppb
2016-11-21	LA27856-1	2.70 ppb
2016-11-21	LA27857-1	3.00 ppb
2016-11-21	LA27858-1	3.70 ppb
2016-11-21	LA27855-1	2.60 ppb
2016-11-21	LA27856-1	2.70 ppb
2016-11-21	LA27857-1	3.00 ppb
2016-11-21	LA27858-1	3.70 ppb
2017-02-10	35294583005	ND
2017-02-10	35294583006	ND
2017-02-10	35294583007	ND
2017-02-10	35294583008	ND
2017-02-10	35294583005	ND
2017-02-10	35294583006	ND
2017-02-10	35294583007	ND
2017-02-10	35294583008	ND
2017-05-05	35310763022	ND
2017-05-05	35310763023	1.60 ppb
2017-05-05	35310763024	ND
2017-05-05	35310763025	1.000 ppb
2017-05-05	35310763022	ND
2017-05-05	35310763023	1.60 ppb
2017-05-05	35310763024	ND
2017-05-05	35310763025	1.000 ppb
2017-08-11	35329943011	ND
2017-08-11	35329943012	ND
2017-08-11	35329943013	ND
2017-08-11	35329943014	ND
2017-08-11	35329943011	ND
2017-08-11	35329943012	ND
2017-08-11	35329943013	ND
2017-08-11	35329943014	ND
2017-11-02	35346207001	1.10 ppb
2017-11-02	35346207002	2.00 ppb
2017-11-02	35346207003	1.50 ppb
2017-11-02	35346207004	1.000 ppb
2017-11-02	35346207001	1.10 ppb
2017-11-02	35346207002	2.00 ppb
2017-11-02	35346207003	1.50 ppb
2017-11-02	35346207004	1.000 ppb
2018-02-01	35371889001	ND
2018-02-01	35371889002	ND
2018-02-01	35371889003	ND
2018-02-01	35371889004	ND
2018-02-01	35371889001	ND
2018-02-01	35371889002	ND
2018-02-01	35371889003	ND
2018-02-01	35371889004	ND
2018-05-10	35391903001	ND
2018-05-10	35391903002	ND
2018-05-10	35391903003	ND
2018-05-10	35391903004	ND
2018-05-10	35391903001	ND
2018-05-10	35391903002	ND
2018-05-10	35391903003	ND
2018-05-10	35391903004	ND
2018-08-23	35413449001	ND
2018-08-23	35413449002	ND
2018-08-23	35413449003	ND
2018-08-23	35413449004	2.10 ppb
2018-08-23	35413449001	ND
2018-08-23	35413449002	ND
2018-08-23	35413449003	ND
2018-08-23	35413449004	2.10 ppb
2018-11-08	35430370001	0.990 ppb
2018-11-08	35430370002	ND
2018-11-08	35430370003	ND
2018-11-08	35430370004	ND
2018-11-08	35430370001	0.990 ppb
2018-11-08	35430370002	ND
2018-11-08	35430370003	ND
2018-11-08	35430370004	ND
2019-02-20	35450027001	ND
2019-02-20	35450027002	ND
2019-02-20	35450027003	ND
2019-02-20	35450027004	ND
2019-02-20	35450027001	ND
2019-02-20	35450027002	ND
2019-02-20	35450027003	ND
2019-02-20	35450027004	ND
2019-05-09	35468292001	2.30 ppb
2019-05-09	35468292002	ND
2019-05-09	35468292003	ND
2019-05-09	35468292004	ND
2019-05-09	35468292001	2.30 ppb
2019-05-09	35468292002	ND
2019-05-09	35468292003	ND
2019-05-09	35468292004	ND
2019-08-02	35486851001	ND
2019-08-02	35486851002	ND
2019-08-02	35486851003	ND
2019-08-02	35486851004	0.970 ppb
2019-08-02	35486851001	ND
2019-08-02	35486851002	ND
2019-08-02	35486851003	ND
2019-08-02	35486851004	0.970 ppb
2019-11-07	35511104001	ND
2019-11-07	35511104002	1.20 ppb
2019-11-07	35511104003	ND
2019-11-07	35511104004	ND
2019-11-07	35511104001	ND
2019-11-07	35511104002	1.20 ppb
2019-11-07	35511104003	ND
2019-11-07	35511104004	ND