Monobromoacetic acid

Table Grove

Monobromoacetic 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	3.93 ppb	2	2	2.28 ppb - 5.57 ppb
2015	4.46 ppb	4	4	1.99 ppb - 6.53 ppb
2016	1.30 ppb	4	4	1.000 ppb - 1.60 ppb
2017	0.880 ppb	5	2	ND - 2.20 ppb
2018	ND	4	0	ND
2019	ND	5	0	ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 25 ppb

The EWG Health Guideline of 25 ppb for monobromoacetic 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 muscular degeneration.

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-07-07	1407482-001B	5.57 ppb
2014-10-13	1410797-001B	2.28 ppb
2015-01-12	1501644-001B	4.67 ppb
2015-04-14	1504B15-001B	4.66 ppb
2015-07-13	1507C39-001B	1.99 ppb
2015-10-12	1510D92-001B	6.53 ppb
2016-01-11	31311401	1.40 ppb
2016-04-11	32040801	1.20 ppb
2016-07-11	32632001	1.000 ppb
2016-10-10	33882601	1.60 ppb
2017-01-09	170100160-001	2.20 ppb
2017-01-09	34696801	2.20 ppb
2017-04-10	35376601	ND
2017-07-10	36319401	ND
2017-10-09	36967201	ND
2018-01-08	37961701	ND
2018-04-09	38901401	ND
2018-07-19	39922101	ND
2018-10-08	41042901	ND
2019-01-14	42261501	ND
2019-04-29	43308801	ND
2019-07-08	44921801	ND
2019-09-09	46635601	ND
2019-10-14	47509301	ND