Monobromoacetic acid

Weymouth Water Department

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

112

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	N/A	0	0	N/A
2015	1.30 ppb	24	9	ND - 9.40 ppb
2016	0.419 ppb	32	19	ND - 1.10 ppb
2017	0.208 ppb	16	4	ND - 0.930 ppb
2018	0.388 ppb	8	4	ND - 0.930 ppb
2019	0.0201 ppb	32	1	ND - 0.642 ppb

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	Result
2015-05-06	ND
2015-05-06	0.630 ppb
2015-05-06	ND
2015-05-06	ND
2015-05-06	0.580 ppb
2015-05-06	ND
2015-05-06	0.700 ppb
2015-05-06	0.770 ppb
2015-08-05	ND
2015-08-05	4.30 ppb
2015-08-05	ND
2015-08-05	ND
2015-08-05	0.860 ppb
2015-08-05	ND
2015-08-05	8.40 ppb
2015-08-05	ND
2015-11-04	ND
2015-11-04	ND
2015-11-04	5.60 ppb
2015-11-04	ND
2015-11-04	9.40 ppb
2015-11-04	ND
2015-11-04	ND
2015-11-04	ND
2016-02-17	0.760 ppb
2016-02-17	0.750 ppb
2016-02-17	ND
2016-02-17	ND
2016-02-17	0.680 ppb
2016-02-17	0.560 ppb
2016-02-17	0.810 ppb
2016-02-17	0.800 ppb
2016-05-04	ND
2016-05-04	0.520 ppb
2016-05-04	ND
2016-05-04	ND
2016-05-04	0.600 ppb
2016-05-04	ND
2016-05-04	0.620 ppb
2016-05-04	0.620 ppb
2016-08-03	ND
2016-08-03	0.580 ppb
2016-08-03	0.620 ppb
2016-08-03	ND
2016-08-03	0.740 ppb
2016-08-03	ND
2016-08-03	0.640 ppb
2016-08-03	1.10 ppb
2016-11-02	ND
2016-11-02	1.000 ppb
2016-11-02	ND
2016-11-02	0.740 ppb
2016-11-02	ND
2016-11-02	0.650 ppb
2016-11-23	ND
2016-11-23	0.620 ppb
2017-02-17	ND
2017-02-17	0.780 ppb
2017-02-17	ND
2017-02-17	ND
2017-02-17	0.800 ppb
2017-02-17	ND
2017-02-17	0.930 ppb
2017-02-17	0.810 ppb
2017-08-09	ND
2017-08-09	ND
2017-08-09	ND
2017-08-09	ND
2017-08-09	ND
2017-08-09	ND
2017-08-09	ND
2017-08-09	ND
2018-11-07	ND
2018-11-07	0.730 ppb
2018-11-07	ND
2018-11-07	ND
2018-11-07	0.930 ppb
2018-11-07	ND
2018-11-07	0.860 ppb
2018-11-07	0.580 ppb
2019-02-22	0.642 ppb
2019-02-22	ND
2019-02-22	ND
2019-02-22	ND
2019-02-22	ND
2019-02-25	ND
2019-02-25	ND
2019-02-25	ND
2019-06-21	ND
2019-06-21	ND
2019-06-21	ND
2019-06-21	ND
2019-06-21	ND
2019-06-21	ND
2019-06-21	ND
2019-06-21	ND
2019-08-16	ND
2019-08-16	ND
2019-08-16	ND
2019-08-16	ND
2019-08-16	ND
2019-08-16	ND
2019-08-16	ND
2019-10-09	ND
2019-11-20	ND
2019-11-20	ND
2019-11-20	ND
2019-11-20	ND
2019-11-20	ND
2019-11-20	ND
2019-11-20	ND
2019-11-20	ND