Dibromoacetic acid

Roche Harbor Water System Inc.

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	0.463 ppb	8	2	ND - 2.50 ppb
2015	1.94 ppb	5	4	ND - 3.90 ppb
2016	0.900 ppb	5	2	ND - 2.90 ppb
2017	1.08 ppb	5	3	ND - 2.50 ppb
2018	1.14 ppb	5	2	ND - 3.60 ppb
2019	1.90 ppb	4	3	ND - 4.40 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
2014-01-06	00612	ND
2014-02-04	04910	ND
2014-04-01	13662	ND
2014-05-06	19367	ND
2014-06-24	27755	ND
2014-07-08	29679	1.20 ppb
2014-08-18	36662	2.50 ppb
2014-10-06	44845	ND
2015-01-06	00660	1.80 ppb
2015-04-06	14375	1.90 ppb
2015-05-26	23697	ND
2015-07-06	30421	3.90 ppb
2015-10-06	48112	2.10 ppb
2016-01-06		1.60 ppb
2016-04-12		ND
2016-05-16		ND
2016-07-05		ND
2016-10-06		2.90 ppb
2017-01-10		1.50 ppb
2017-04-25		ND
2017-05-18		ND
2017-07-05		1.40 ppb
2017-10-04		2.50 ppb
2018-01-10		2.10 ppb
2018-04-25		ND
2018-06-13		ND
2018-07-10		ND
2018-10-02		3.60 ppb
2019-01-02		2.20 ppb
2019-04-01		1.000 ppb
2019-07-08		4.40 ppb
2019-10-07		ND