Bromodichloromethane

Moline

Bromodichloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromodichloromethane 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	0.584 ppb	16	13	ND - 1.17 ppb
2015	0.504 ppb	16	10	ND - 1.19 ppb
2016	0.222 ppb	16	6	ND - 0.621 ppb
2017	ND	16	0	ND
2018	0.336 ppb	16	5	ND - 1.31 ppb
2019	0.418 ppb	16	9	ND - 1.03 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.06 ppb

The EWG Health Guideline of 0.06 ppb for bromodichloromethane 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	Lab ID	Result
2014-02-05	4020551-01	0.939 ppb
2014-02-05	4020551-02	1.02 ppb
2014-02-05	4020551-03	1.17 ppb
2014-02-05	4020551-04	0.960 ppb
2014-05-07	4051461-01	ND
2014-05-07	4051461-02	ND
2014-05-07	4051461-03	0.552 ppb
2014-05-07	4051461-04	ND
2014-08-05	4081304-01	0.564 ppb
2014-08-05	4081304-02	0.625 ppb
2014-08-05	4081304-03	0.586 ppb
2014-08-05	4081304-04	0.506 ppb
2014-11-05	4111160-03	0.666 ppb
2014-11-05	4111160-04	0.576 ppb
2014-11-05	4111160-02	0.605 ppb
2014-11-05	4111160-01	0.583 ppb
2015-02-03	5020729-01	0.615 ppb
2015-02-03	5020729-04	0.530 ppb
2015-02-03	5020729-02	0.868 ppb
2015-02-03	5020729-03	0.609 ppb
2015-05-13	5052137-01	ND
2015-05-13	5052137-04	ND
2015-05-13	5052137-03	ND
2015-05-13	5052137-02	ND
2015-08-05	5081259-02	0.571 ppb
2015-08-05	5081259-03	0.682 ppb
2015-08-05	5081259-01	ND
2015-08-05	5081259-04	ND
2015-11-03	5111151-03	0.969 ppb
2015-11-04	5111151-02	1.19 ppb
2015-11-04	5111151-04	1.08 ppb
2015-11-05	5111151-01	0.954 ppb
2016-02-18	6023326-04	ND
2016-02-18	6023326-03	ND
2016-02-18	6023326-02	0.615 ppb
2016-02-18	6023326-01	ND
2016-05-03	6050853-02	ND
2016-05-03	6050853-04	ND
2016-05-03	6050853-01	ND
2016-05-03	6050853-03	ND
2016-08-02	6080874-04	0.590 ppb
2016-08-02	6080874-01	0.621 ppb
2016-08-02	6080874-02	0.587 ppb
2016-08-02	6080874-03	0.580 ppb
2016-11-08	6111802-01	ND
2016-11-08	6111802-04	0.553 ppb
2016-11-08	6111802-02	ND
2016-11-08	6111802-03	ND
2017-02-14	7022594-01	ND
2017-02-14	7022594-04	ND
2017-02-14	7022594-03	ND
2017-02-14	7022594-02	ND
2017-05-16	7053331-03	ND
2017-05-16	7053331-02	ND
2017-05-16	7053331-01	ND
2017-05-16	7053331-04	ND
2017-08-08	7082094-02	ND
2017-08-08	7082094-03	ND
2017-08-08	7082094-01	ND
2017-08-08	7082094-04	ND
2017-11-07	7111515-02	ND
2017-11-07	7111515-03	ND
2017-11-07	7111515-01	ND
2017-11-07	7111515-04	ND
2018-02-13	8022526-04	ND
2018-02-13	8022526-02	ND
2018-02-13	8022526-01	ND
2018-02-14	8022526-03	ND
2018-05-09	8052302-01	ND
2018-05-09	8052302-02	ND
2018-05-09	8052302-04	ND
2018-05-09	8052302-03	ND
2018-08-08	8082225-04	1.29 ppb
2018-08-08	8082225-03	1.22 ppb
2018-08-08	8082225-02	1.06 ppb
2018-08-08	8082225-01	1.31 ppb
2018-11-06	8111775-04	ND
2018-11-06	8111775-03	0.500 ppb
2018-11-06	8111775-02	ND
2018-11-06	8111775-01	ND
2019-02-06	9021466-03	ND
2019-02-06	9021466-02	ND
2019-02-06	9021466-01	ND
2019-02-13	9022430-01	ND
2019-05-14	9053451-04	0.532 ppb
2019-05-14	9053451-03	0.595 ppb
2019-05-14	9053451-02	0.516 ppb
2019-05-14	9053451-01	0.516 ppb
2019-08-14	9083351-01	0.924 ppb
2019-08-14	9083351-04	0.984 ppb
2019-08-14	9083351-03	1.03 ppb
2019-08-14	9083351-02	0.949 ppb
2019-11-18	9113298-04	ND
2019-11-18	9113298-03	0.635 ppb
2019-11-18	9113298-02	ND
2019-11-18	9113298-01	ND