Dibromochloromethane

Chicopee Water Department (MWRA)

Dibromochloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Dibromochloromethane 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

160

Samples

Samples exceeding legal limit (MCL)

142

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	0.334 ppb	26	12	ND - 0.960 ppb
2015	0.460 ppb	32	24	ND - 0.770 ppb
2016	0.846 ppb	32	32	0.520 ppb - 1.34 ppb
2017	0.905 ppb	32	32	0.650 ppb - 1.27 ppb
2018	0.788 ppb	32	32	0.630 ppb - 1.15 ppb
2019	0.384 ppb	32	22	ND - 0.680 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for dibromochloromethane was proposed in 2018 by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

ppb = parts per billion

All test results

Date	Result
2015-03-02	0.540 ppb
2015-03-02	0.670 ppb
2015-03-02	0.620 ppb
2015-03-02	0.680 ppb
2015-03-02	0.570 ppb
2015-03-02	0.580 ppb
2015-03-02	0.610 ppb
2015-03-02	0.590 ppb
2015-06-01	ND
2015-06-01	ND
2015-06-01	ND
2015-06-01	ND
2015-06-01	ND
2015-06-01	ND
2015-06-01	ND
2015-06-01	ND
2015-08-31	0.520 ppb
2015-08-31	0.620 ppb
2015-08-31	0.510 ppb
2015-08-31	0.640 ppb
2015-08-31	0.650 ppb
2015-08-31	0.510 ppb
2015-08-31	0.580 ppb
2015-08-31	0.550 ppb
2015-11-30	0.680 ppb
2015-11-30	0.560 ppb
2015-11-30	0.650 ppb
2015-11-30	0.560 ppb
2015-12-01	0.700 ppb
2015-12-01	0.770 ppb
2015-12-01	0.690 ppb
2015-12-01	0.680 ppb
2016-03-01	0.570 ppb
2016-03-01	0.550 ppb
2016-03-01	0.630 ppb
2016-03-01	0.630 ppb
2016-03-02	0.520 ppb
2016-03-02	0.530 ppb
2016-03-02	0.540 ppb
2016-03-02	0.540 ppb
2016-06-06	1.04 ppb
2016-06-06	1.07 ppb
2016-06-06	0.790 ppb
2016-06-06	0.890 ppb
2016-06-06	0.910 ppb
2016-06-06	0.750 ppb
2016-06-06	0.880 ppb
2016-06-06	0.780 ppb
2016-09-07	0.740 ppb
2016-09-07	1.06 ppb
2016-09-07	0.940 ppb
2016-09-07	1.06 ppb
2016-09-07	0.980 ppb
2016-09-07	0.730 ppb
2016-09-07	0.930 ppb
2016-09-07	0.770 ppb
2016-12-05	0.850 ppb
2016-12-05	1.34 ppb
2016-12-05	0.970 ppb
2016-12-05	1.02 ppb
2016-12-05	1.12 ppb
2016-12-05	0.880 ppb
2016-12-05	1.01 ppb
2016-12-05	1.04 ppb
2017-03-06	0.740 ppb
2017-03-06	0.940 ppb
2017-03-06	0.850 ppb
2017-03-06	0.800 ppb
2017-03-06	0.890 ppb
2017-03-06	0.730 ppb
2017-03-06	0.950 ppb
2017-03-06	0.850 ppb
2017-06-05	0.780 ppb
2017-06-05	0.920 ppb
2017-06-05	0.880 ppb
2017-06-05	0.960 ppb
2017-06-05	0.880 ppb
2017-06-05	0.840 ppb
2017-06-05	0.960 ppb
2017-06-05	0.870 ppb
2017-09-05	0.650 ppb
2017-09-05	0.990 ppb
2017-09-05	0.780 ppb
2017-09-05	0.850 ppb
2017-09-05	0.840 ppb
2017-09-05	0.780 ppb
2017-09-05	0.800 ppb
2017-09-05	0.750 ppb
2017-12-04	0.920 ppb
2017-12-04	1.17 ppb
2017-12-04	1.02 ppb
2017-12-04	1.03 ppb
2017-12-04	1.22 ppb
2017-12-04	0.920 ppb
2017-12-04	1.27 ppb
2017-12-04	1.12 ppb
2018-03-05	0.710 ppb
2018-03-05	0.810 ppb
2018-03-05	0.640 ppb
2018-03-05	0.700 ppb
2018-03-05	0.760 ppb
2018-03-05	0.680 ppb
2018-03-05	0.800 ppb
2018-03-05	0.830 ppb
2018-06-04	1.04 ppb
2018-06-04	1.15 ppb
2018-06-04	0.920 ppb
2018-06-04	0.850 ppb
2018-06-04	0.930 ppb
2018-06-04	0.820 ppb
2018-06-04	1.11 ppb
2018-06-04	0.930 ppb
2018-09-04	0.640 ppb
2018-09-04	0.890 ppb
2018-09-04	0.670 ppb
2018-09-04	0.660 ppb
2018-09-04	0.970 ppb
2018-09-04	0.730 ppb
2018-09-04	0.850 ppb
2018-09-04	0.640 ppb
2018-12-03	0.630 ppb
2018-12-03	0.820 ppb
2018-12-03	0.660 ppb
2018-12-03	0.680 ppb
2018-12-03	0.670 ppb
2018-12-03	0.630 ppb
2018-12-03	0.690 ppb
2018-12-03	0.720 ppb
2019-03-06	ND
2019-03-06	0.560 ppb
2019-03-06	0.550 ppb
2019-03-06	0.520 ppb
2019-03-06	0.600 ppb
2019-03-06	ND
2019-03-06	0.550 ppb
2019-03-06	0.520 ppb
2019-06-03	ND
2019-06-03	0.560 ppb
2019-06-03	ND
2019-06-03	0.520 ppb
2019-06-03	0.510 ppb
2019-06-03	ND
2019-06-03	0.550 ppb
2019-06-03	ND
2019-09-03	0.500 ppb
2019-09-03	0.660 ppb
2019-09-03	0.580 ppb
2019-09-03	ND
2019-09-03	0.590 ppb
2019-09-03	0.500 ppb
2019-09-03	0.580 ppb
2019-09-03	ND
2019-12-02	ND
2019-12-02	0.680 ppb
2019-12-02	0.570 ppb
2019-12-02	ND
2019-12-02	0.520 ppb
2019-12-02	0.510 ppb
2019-12-02	0.610 ppb
2019-12-02	0.560 ppb