Dichloroacetic acid

Goldonna 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

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	ND	4	0	ND
2015	ND	4	0	ND
2016	ND	4	0	ND
2017	0.360 ppb	4	2	ND - 0.720 ppb
2018	0.340 ppb	4	2	ND - 0.680 ppb
2019	0.560 ppb	4	4	0.480 ppb - 0.640 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
2014-08-18	1327527	ND
2014-08-18	1327526	ND
2014-08-18	1327527	ND
2014-08-18	1327526	ND
2015-08-17	1420002	ND
2015-08-17	1420002	ND
2015-08-17	1420003	ND
2015-08-17	1420003	ND
2016-08-15	1516446	ND
2016-08-15	1516447	ND
2016-08-15	1516447	ND
2016-08-15	1516446	ND
2017-08-03	35328362048	ND
2017-08-03	35328362048	ND
2017-08-03	35328362047	0.720 ppb
2017-08-03	35328362047	0.720 ppb
2018-08-27	35414236002	ND
2018-08-27	35414236001	0.680 ppb
2018-08-27	35414236001	0.680 ppb
2018-08-27	35414236002	ND
2019-08-26	35494510001	0.480 ppb
2019-08-26	35494510002	0.640 ppb
2019-08-26	35494510001	0.480 ppb
2019-08-26	35494510002	0.640 ppb