Monochloroacetic acid

Coffey PWS

NOTE: Coffey PWS purchases water from Harrison County Public Water Supply District 2 which is required to test for monochloroacetic acid. Sample information shown below was taken by Harrison County Public Water Supply District 2.

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

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Range of results
2014	ND	1	ND
2015	ND	2	ND
2016	ND	4	ND
2017	ND	4	ND
2018	ND	8	ND
2019	ND	8	ND

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
2014-07-30	AC30702	ND
2014-07-30	AC30701	ND
2015-08-24	AC54317	ND
2015-08-24	AC54316	ND
2016-07-27	AC79714	ND
2016-07-27	AC79715	ND
2017-07-17	AD01427	ND
2017-07-17	AD01426	ND
2018-08-20	AD29202	ND
2018-08-20	AD29203	ND
2018-11-14	AD35365	ND
2018-11-14	AD35364	ND
2019-03-25	AD37733	ND
2019-03-25	AD37734	ND
2019-05-22	AD46153	ND
2019-05-22	AD46154	ND
2019-07-30	AD51820	ND
2019-07-30	AD51821	ND
2019-11-20	AD56739	ND
2019-11-20	AD56740	ND