Dibromochloromethane

Lawrence Water Works

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

186

Samples

Samples exceeding legal limit (MCL)

161

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	0.605 ppb	4	3	ND - 1.35 ppb
2015	2.36 ppb	36	34	ND - 5.50 ppb
2016	3.58 ppb	37	36	ND - 11.3 ppb
2017	2.01 ppb	45	35	ND - 7.60 ppb
2018	0.928 ppb	37	33	ND - 2.00 ppb
2019	2.21 ppb	27	20	ND - 6.10 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
2014-02-04	0.500 ppb
2014-05-06	ND
2014-08-06	1.35 ppb
2014-11-05	0.570 ppb
2015-02-04	1.60 ppb
2015-02-04	1.40 ppb
2015-02-04	1.50 ppb
2015-02-04	1.50 ppb
2015-02-04	1.50 ppb
2015-02-04	1.50 ppb
2015-02-04	1.60 ppb
2015-02-04	1.60 ppb
2015-02-04	ND
2015-05-05	1.50 ppb
2015-05-05	1.70 ppb
2015-05-05	1.50 ppb
2015-05-05	1.80 ppb
2015-05-05	1.50 ppb
2015-05-05	1.70 ppb
2015-05-05	1.50 ppb
2015-05-05	1.90 ppb
2015-06-16	1.70 ppb
2015-08-04	5.50 ppb
2015-08-04	4.10 ppb
2015-08-04	4.90 ppb
2015-08-04	4.90 ppb
2015-08-04	5.40 ppb
2015-08-04	5.40 ppb
2015-08-04	5.00 ppb
2015-08-04	4.80 ppb
2015-08-04	3.10 ppb
2015-11-03	2.10 ppb
2015-11-03	0.730 ppb
2015-11-03	2.30 ppb
2015-11-03	1.80 ppb
2015-11-03	2.00 ppb
2015-11-03	2.10 ppb
2015-11-03	2.50 ppb
2015-11-03	1.50 ppb
2015-11-03	ND
2016-01-05	ND
2016-02-02	1.30 ppb
2016-02-02	1.20 ppb
2016-02-02	1.20 ppb
2016-02-02	1.60 ppb
2016-02-02	1.20 ppb
2016-02-02	0.920 ppb
2016-02-02	1.20 ppb
2016-02-02	1.40 ppb
2016-05-02	3.40 ppb
2016-05-02	3.00 ppb
2016-05-02	3.50 ppb
2016-05-02	3.30 ppb
2016-05-02	3.20 ppb
2016-05-02	3.50 ppb
2016-05-02	3.10 ppb
2016-05-02	3.00 ppb
2016-05-02	1.10 ppb
2016-05-02	1.10 ppb
2016-08-02	11.3 ppb
2016-08-02	10.7 ppb
2016-08-02	10.3 ppb
2016-08-02	7.80 ppb
2016-08-02	9.20 ppb
2016-08-02	10.00 ppb
2016-08-02	9.10 ppb
2016-08-02	9.70 ppb
2016-08-02	2.50 ppb
2016-11-08	2.00 ppb
2016-11-08	0.800 ppb
2016-11-08	1.70 ppb
2016-11-08	1.90 ppb
2016-11-08	1.80 ppb
2016-11-08	1.30 ppb
2016-11-08	1.80 ppb
2016-11-08	1.70 ppb
2016-11-08	0.600 ppb
2017-02-07	1.90 ppb
2017-02-07	1.60 ppb
2017-02-07	1.60 ppb
2017-02-07	1.70 ppb
2017-02-07	1.60 ppb
2017-02-07	1.70 ppb
2017-02-07	1.60 ppb
2017-02-07	1.70 ppb
2017-02-07	0.700 ppb
2017-05-02	0.900 ppb
2017-05-02	0.690 ppb
2017-05-02	0.980 ppb
2017-05-02	0.800 ppb
2017-05-02	1.000 ppb
2017-05-02	0.890 ppb
2017-05-02	0.830 ppb
2017-05-02	0.720 ppb
2017-05-02	ND
2017-08-08	7.60 ppb
2017-08-08	6.80 ppb
2017-08-08	7.20 ppb
2017-08-08	7.60 ppb
2017-08-08	7.20 ppb
2017-08-08	7.40 ppb
2017-08-08	7.00 ppb
2017-08-08	7.10 ppb
2017-08-08	3.80 ppb
2017-11-10	ND
2017-11-10	ND
2017-11-10	ND
2017-11-10	0.660 ppb
2017-11-10	ND
2017-11-10	ND
2017-11-10	ND
2017-11-10	ND
2017-11-10	ND
2017-12-21	0.870 ppb
2017-12-21	0.680 ppb
2017-12-21	0.900 ppb
2017-12-21	0.730 ppb
2017-12-21	0.800 ppb
2017-12-21	0.880 ppb
2017-12-21	1.40 ppb
2017-12-21	0.870 ppb
2017-12-21	ND
2018-02-06	0.600 ppb
2018-02-06	1.50 ppb
2018-02-06	0.670 ppb
2018-02-06	1.30 ppb
2018-02-06	0.630 ppb
2018-02-06	0.700 ppb
2018-02-06	0.610 ppb
2018-02-06	0.630 ppb
2018-02-06	ND
2018-05-08	0.770 ppb
2018-05-08	0.650 ppb
2018-05-08	0.700 ppb
2018-05-08	0.720 ppb
2018-05-08	0.730 ppb
2018-05-08	0.730 ppb
2018-05-08	0.890 ppb
2018-05-08	0.790 ppb
2018-05-08	ND
2018-08-07	1.70 ppb
2018-08-07	1.30 ppb
2018-08-07	1.80 ppb
2018-08-07	1.70 ppb
2018-08-07	1.60 ppb
2018-08-07	1.50 ppb
2018-08-07	1.50 ppb
2018-08-07	2.00 ppb
2018-08-07	0.700 ppb
2018-10-09	ND
2018-11-05	1.20 ppb
2018-11-05	0.550 ppb
2018-11-05	1.20 ppb
2018-11-05	0.890 ppb
2018-11-05	1.10 ppb
2018-11-05	0.990 ppb
2018-11-05	1.000 ppb
2018-11-05	1.000 ppb
2018-11-05	ND
2019-02-05	1.10 ppb
2019-02-05	0.980 ppb
2019-02-05	1.10 ppb
2019-02-05	0.960 ppb
2019-02-05	1.10 ppb
2019-02-05	1.20 ppb
2019-02-05	1.20 ppb
2019-02-05	1.20 ppb
2019-02-05	ND
2019-05-06	ND
2019-05-06	ND
2019-05-06	0.520 ppb
2019-05-06	ND
2019-05-06	ND
2019-05-06	0.700 ppb
2019-05-06	ND
2019-05-06	ND
2019-05-06	0.500 ppb
2019-08-07	5.90 ppb
2019-08-07	4.30 ppb
2019-08-07	5.80 ppb
2019-08-07	5.80 ppb
2019-08-07	6.10 ppb
2019-08-07	5.60 ppb
2019-08-07	5.30 ppb
2019-08-07	6.10 ppb
2019-08-07	4.20 ppb