Dibromoacetic acid

City of Portsmouth

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
2013	N/A	0	0	N/A
2014	N/A	0	0	N/A
2015	N/A	0	0	N/A
2016	ND	9	0	ND
2017	0.142 ppb	18	1	ND - 2.55 ppb
2018	0.711 ppb	36	15	ND - 3.13 ppb
2019	0.629 ppb	27	9	ND - 2.10 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
2016-08-03	216217-11	ND
2016-08-03	216217-10	ND
2016-08-03	216217-09	ND
2016-08-03	216217-08	ND
2016-08-03	216217-06	ND
2016-08-03	216217-07	ND
2016-08-03	216217-05	ND
2016-08-03	216217-04	ND
2016-08-03	216217-02	ND
2017-02-01	217033-05	ND
2017-02-01	217033-07	2.55 ppb
2017-02-01	217033-04	ND
2017-02-01	217033-08	ND
2017-02-01	217033-09	ND
2017-02-01	217033-10	ND
2017-02-01	217033-11	ND
2017-02-01	217033-02	ND
2017-02-01	217033-06	ND
2017-11-01	217306-15	ND
2017-11-01	217306-16	ND
2017-11-01	217306-22	ND
2017-11-01	217306-21	ND
2017-11-01	217306-20	ND
2017-11-01	217306-23	ND
2017-11-01	217306-19	ND
2017-11-01	217306-18	ND
2017-11-01	217306-17	ND
2018-02-01	218032-11	ND
2018-02-01	218032-10	ND
2018-02-01	218032-09	ND
2018-02-01	218032-08	ND
2018-02-01	218032-07	ND
2018-02-01	218032-06	ND
2018-02-01	218032-05	ND
2018-02-01	218032-04	ND
2018-02-01	218032-03	ND
2018-05-01	218124-11	ND
2018-05-01	218124-03	ND
2018-05-01	218124-04	ND
2018-05-01	218124-05	ND
2018-05-01	218124-06	ND
2018-05-01	218124-08	ND
2018-05-01	218124-09	ND
2018-05-01	218124-10	ND
2018-05-01	218124-07	ND
2018-08-01	218214-06	1.22 ppb
2018-08-01	218214-03	1.22 ppb
2018-08-01	218214-04	1.26 ppb
2018-08-01	218214-05	1.23 ppb
2018-08-01	218214-07	1.22 ppb
2018-08-01	218214-08	ND
2018-08-01	218214-09	1.26 ppb
2018-08-01	218214-10	1.30 ppb
2018-08-01	218214-11	ND
2018-11-01	218306-06	1.39 ppb
2018-11-01	218306-11	ND
2018-11-01	218306-10	3.13 ppb
2018-11-01	218306-09	1.76 ppb
2018-11-01	218306-08	1.14 ppb
2018-11-01	218306-07	1.79 ppb
2018-11-01	218306-05	2.07 ppb
2018-11-01	218306-04	2.78 ppb
2018-11-01	218306-03	2.81 ppb
2019-02-05	219037-11	1.90 ppb
2019-02-05	219037-10	1.78 ppb
2019-02-05	219037-09	2.07 ppb
2019-02-05	219037-08	2.03 ppb
2019-02-05	219037-07	1.87 ppb
2019-02-05	219037-06	2.10 ppb
2019-02-05	219037-05	2.04 ppb
2019-02-05	219037-04	2.03 ppb
2019-02-05	219037-03	1.17 ppb
2019-08-01	219214-04H	ND
2019-08-01	219214-10H	ND
2019-08-01	219214-09H	ND
2019-08-01	219214-08H	ND
2019-08-01	219214-07H	ND
2019-08-01	219214-06H	ND
2019-08-01	219214-05H	ND
2019-08-01	219214-03H	ND
2019-08-01	219214-11H	ND
2019-11-01	219305-02H	ND
2019-11-01	219305-04H	ND
2019-11-01	219305-05H	ND
2019-11-01	219305-06H	ND
2019-11-01	219305-07H	ND
2019-11-01	219305-08H	ND
2019-11-01	219305-09H	ND
2019-11-01	219305-10H	ND
2019-11-01	219305-11H	ND