Dibromoacetic acid

Norwalk City

Dibromoacetic 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	16	0	ND
2015	ND	16	0	ND
2016	0.625 ppb	16	6	ND - 2.30 ppb
2017	0.581 ppb	16	4	ND - 2.40 ppb
2018	0.806 ppb	16	9	ND - 1.60 ppb
2019	0.275 ppb	12	3	ND - 1.20 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.04 ppb

The EWG Health Guideline of 0.04 ppb for dibromoacetic acid was defined in a peer-reviewed scientific study by EWG and represents a on-in-a-million lifetime cancer risk level. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-02-06	AG64239	ND
2014-02-06	AG64238	ND
2014-02-06	AG64241	ND
2014-02-06	AG64240	ND
2014-05-07	AG70263	ND
2014-05-07	AG70264	ND
2014-05-07	AG70265	ND
2014-05-07	AG70262	ND
2014-08-01	AG76692	ND
2014-08-01	AG76693	ND
2014-08-01	AG76694	ND
2014-08-01	AG76695	ND
2014-11-05	AG84540	ND
2014-11-05	AG84541	ND
2014-11-05	AG84539	ND
2014-11-05	AG84538	ND
2015-02-04	AG90163	ND
2015-02-04	AG90164	ND
2015-02-04	AG90165	ND
2015-02-04	AG90166	ND
2015-05-06	AG95919	ND
2015-05-06	AG95920	ND
2015-05-06	AG95921	ND
2015-05-06	AG95922	ND
2015-08-05	AH02944	ND
2015-08-05	AH02945	ND
2015-08-05	AH02946	ND
2015-08-05	AH02947	ND
2015-11-04	AH09515	ND
2015-11-04	AH09516	ND
2015-11-04	AH09517	ND
2015-11-04	AH09518	ND
2016-02-03	AH14967	ND
2016-02-03	AH14968	ND
2016-02-03	AH14969	ND
2016-02-03	AH14970	ND
2016-05-04	AH21101	ND
2016-05-04	AH21104	2.30 ppb
2016-05-04	AH21103	2.30 ppb
2016-05-04	AH21102	ND
2016-08-03	AH27543	ND
2016-08-03	AH27544	ND
2016-08-03	AH27545	ND
2016-08-03	AH27546	ND
2016-11-02	AH35045	1.30 ppb
2016-11-02	AH35044	1.40 ppb
2016-11-02	AH35042	1.30 ppb
2016-11-02	AH35043	1.40 ppb
2017-02-01	AH42082	ND
2017-02-01	AH42083	ND
2017-02-01	AH42084	ND
2017-02-01	AH42085	ND
2017-05-03	AH49011	ND
2017-05-03	AH49012	ND
2017-05-03	AH49013	ND
2017-05-03	AH49014	ND
2017-08-02	AH56581	ND
2017-08-02	AH56580	ND
2017-08-02	AH56579	ND
2017-08-02	AH56578	ND
2017-11-01	AH63372	2.40 ppb
2017-11-01	AH63373	2.40 ppb
2017-11-01	AH63374	2.30 ppb
2017-11-01	AH63375	2.20 ppb
2018-02-06	18-12105-01	1.60 ppb
2018-02-06	18-12105-02	1.20 ppb
2018-02-06	18-12105-03	1.30 ppb
2018-02-06	18-12105-04	1.20 ppb
2018-05-01	M18-17864-04	1.60 ppb
2018-05-01	M18-17864-03	1.60 ppb
2018-05-01	M18-17864-02	1.50 ppb
2018-05-01	M18-17864-01	1.60 ppb
2018-08-02	18-26411-02	ND
2018-08-02	18-26411-04	ND
2018-08-02	18-26411-03	ND
2018-08-02	18-26411-01	ND
2018-11-01	18-34210-03	ND
2018-11-01	18-34210-04	ND
2018-11-01	18-34210-01	1.30 ppb
2018-11-01	18-34210-02	ND
2019-02-04	19-12312-03	ND
2019-02-04	19-12312-04	ND
2019-02-04	19-12312-02	ND
2019-02-04	19-12312-01	ND
2019-05-03	19-19019-01	ND
2019-05-03	19-19019-02	1.10 ppb
2019-05-03	19-19019-03	1.000 ppb
2019-05-03	19-19019-04	ND
2019-08-06	19-27051-02	ND
2019-08-07	19-27051-01	1.20 ppb
2019-08-07	19-27051-03	ND
2019-08-07	19-27051-04	ND