Bromodichloromethane

Moore

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

221

Samples

Samples exceeding legal limit (MCL)

164

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	8.77 ppb	28	23	ND - 15.1 ppb
2015	8.48 ppb	34	26	ND - 16.1 ppb
2016	7.12 ppb	40	30	ND - 15.5 ppb
2017	5.84 ppb	38	25	ND - 13.6 ppb
2018	6.18 ppb	46	33	ND - 12.7 ppb
2019	6.70 ppb	35	27	ND - 12.6 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
2014-03-13	4C14011-01	12.8 ppb
2014-03-13	4C14011-02	11.2 ppb
2014-03-13	4C14011-03	11.7 ppb
2014-03-13	4C14011-04	11.7 ppb
2014-03-13	4C14011-05	ND
2014-03-13	4C14011-08	ND
2014-05-29	4E30010-01	14.3 ppb
2014-05-29	4E30010-02	11.1 ppb
2014-05-29	4E30010-03	13.4 ppb
2014-05-29	4E30010-04	14.0 ppb
2014-05-29	4E30010-05	6.98 ppb
2014-05-29	4E30010-06	6.87 ppb
2014-08-11	4H12133-01	ND
2014-08-11	4H12133-02	ND
2014-08-11	4H12133-03	0.550 ppb
2014-08-11	4H12133-04	8.44 ppb
2014-08-11	4H12133-05	5.94 ppb
2014-08-11	4H12134-01	14.4 ppb
2014-08-11	4H12134-02	8.95 ppb
2014-08-11	4H12134-03	14.7 ppb
2014-08-11	4H12134-04	15.1 ppb
2014-11-18	4K18092-01	11.6 ppb
2014-11-18	4K18092-02	7.33 ppb
2014-11-18	4K18092-03	9.26 ppb
2014-11-18	4K18092-04	12.8 ppb
2014-12-04	4L05007-04RE1	9.57 ppb
2014-12-04	4L05007-05RE1	ND
2014-12-04	4L05007-06RE1	12.9 ppb
2015-02-17	5B17049-01	11.1 ppb
2015-02-17	5B17049-02	12.0 ppb
2015-02-17	5B17049-03	12.5 ppb
2015-02-17	5B17049-04	12.4 ppb
2015-03-16	5C17090-01	8.15 ppb
2015-03-16	5C17090-02	ND
2015-03-16	5C17090-03	7.73 ppb
2015-03-16	5C17090-04	ND
2015-05-14	5E15009-01	13.2 ppb
2015-05-14	5E15009-02	13.9 ppb
2015-05-14	5E15009-03	14.1 ppb
2015-05-14	5E15009-04	13.0 ppb
2015-06-24	5F26009-01	4.75 ppb
2015-06-24	5F26009-02	6.79 ppb
2015-06-24	5F26009-03	ND
2015-06-24	5F26009-04	ND
2015-08-17	5H18116-07	1.35 ppb
2015-08-17	5H18116-08	10.2 ppb
2015-08-18	5H18116-01	14.2 ppb
2015-08-18	5H18116-02	15.2 ppb
2015-08-18	5H18116-03	16.0 ppb
2015-08-18	5H18116-04	15.0 ppb
2015-11-19	5K20004-01	16.1 ppb
2015-11-19	5K20004-02	4.30 ppb
2015-11-19	5K20004-03	14.6 ppb
2015-11-19	5K20004-04	15.8 ppb
2015-12-08	5L08161-04	9.74 ppb
2015-12-08	5L08161-08	9.76 ppb
2015-12-08	5L08161-09	8.39 ppb
2015-12-08	5L08161-10	ND
2015-12-22	5L22074-01	ND
2015-12-22	5L22074-02	7.94 ppb
2015-12-22	5L22074-03	ND
2015-12-22	5L22074-04	ND
2016-02-16	6B16079-01	12.7 ppb
2016-02-16	6B16079-02	1.44 ppb
2016-02-16	6B16079-03	12.7 ppb
2016-02-16	6B16079-04	12.7 ppb
2016-02-22	6B23061-03	ND
2016-02-22	6B23061-05	7.89 ppb
2016-02-23	6B23061-04	1.05 ppb
2016-03-24	6C25003-01	4.26 ppb
2016-03-24	6C25003-02	ND
2016-03-24	6C25003-03	2.11 ppb
2016-03-24	6C25003-04	2.83 ppb
2016-03-24	6C25003-05	11.6 ppb
2016-04-28	6D29012-01	ND
2016-04-28	6D29012-02	5.73 ppb
2016-04-28	6D29012-03	ND
2016-04-28	6D29012-04	ND
2016-04-28	6D29012-05	5.10 ppb
2016-05-05	6E06012-01	14.0 ppb
2016-05-05	6E06012-02	4.98 ppb
2016-05-05	6E06012-03	14.5 ppb
2016-05-05	6E06012-04	14.6 ppb
2016-08-18	6H19015-01	ND
2016-08-18	6H19015-03	8.57 ppb
2016-08-18	6H19015-04	ND
2016-08-18	6H19015-05	ND
2016-08-18	6H19015-06	10.8 ppb
2016-08-18	6H19019-01	14.2 ppb
2016-08-18	6H19019-02	5.73 ppb
2016-08-18	6H19019-03	14.5 ppb
2016-08-18	6H19019-04	14.7 ppb
2016-11-29	6K30029-01	12.8 ppb
2016-11-29	6K30029-02	11.5 ppb
2016-11-29	6K30029-03	15.5 ppb
2016-11-29	6K30029-04RE1	12.7 ppb
2016-12-28	6L29046-01	10.4 ppb
2016-12-28	6L29046-02	ND
2016-12-28	6L29046-03	7.41 ppb
2016-12-28	6L29046-04	10.5 ppb
2016-12-28	6L29046-05	7.35 ppb
2016-12-28	6L29046-06	ND
2017-02-23	7B24006-02	9.39 ppb
2017-02-23	7B24006-03	9.45 ppb
2017-02-23	7B24006-04	10.7 ppb
2017-02-28	7C01024-01	10.1 ppb
2017-03-23	7C24009-01	8.85 ppb
2017-03-23	7C24009-02	ND
2017-03-23	7C24009-03	ND
2017-03-23	7C24009-04	ND
2017-03-23	7C24009-05	ND
2017-03-23	7C24009-06	8.20 ppb
2017-05-15	7E16017-01	10.7 ppb
2017-05-15	7E16017-02	7.00 ppb
2017-05-15	7E16017-03	10.00 ppb
2017-05-15	7E16017-04	11.0 ppb
2017-06-29	7F29076-02	ND
2017-06-29	7F29076-03	ND
2017-06-29	7F29076-04	ND
2017-06-29	7F29076-05	ND
2017-06-30	7G03081-01	ND
2017-06-30	7G03081-02	ND
2017-08-24	7H25008-01	12.5 ppb
2017-08-24	7H25008-02	8.05 ppb
2017-08-24	7H25008-03	13.6 ppb
2017-08-24	7H25008-04	13.2 ppb
2017-09-11	7I12038-05	ND
2017-10-31	7K01144-01	ND
2017-10-31	7K01144-02	ND
2017-10-31	7K01144-03	4.21 ppb
2017-10-31	7K01144-04	8.75 ppb
2017-10-31	7K01144-05	0.730 ppb
2017-10-31	7K01144-06	0.750 ppb
2017-10-31	7K01144-07	8.30 ppb
2017-10-31	7K01144-08	5.43 ppb
2017-10-31	7K01144-09	3.62 ppb
2017-11-07	7K07136-01	11.4 ppb
2017-11-07	7K07136-02	11.8 ppb
2017-11-07	7K07136-03	12.3 ppb
2017-11-07	7K07136-04	12.0 ppb
2018-02-15	AB16017-01	9.41 ppb
2018-02-15	AB16017-02	9.44 ppb
2018-02-15	AB16017-03	9.47 ppb
2018-02-15	AB16017-04	9.73 ppb
2018-03-13	AC13155-01	ND
2018-03-13	AC13155-04	11.4 ppb
2018-03-13	AC13155-05	0.730 ppb
2018-03-13	AC13155-06	12.6 ppb
2018-03-28	AC29087-01	10.6 ppb
2018-03-28	AC29087-04	ND
2018-03-29	AC29087-02	ND
2018-03-29	AC29087-03	ND
2018-05-17	AE18012-01	10.9 ppb
2018-05-17	AE18012-02	8.75 ppb
2018-05-17	AE18012-03	11.4 ppb
2018-05-17	AE18012-04	7.51 ppb
2018-06-11	AF12161-02	5.10 ppb
2018-06-11	AF12161-03	ND
2018-06-11	AF12161-04	4.10 ppb
2018-06-11	AF12161-05	ND
2018-06-11	AF12161-06	1.92 ppb
2018-06-11	AF12163-04	2.51 ppb
2018-06-11	AF12163-05	12.1 ppb
2018-06-11	AF12163-06	ND
2018-08-09	AH10020-01	12.2 ppb
2018-08-09	AH10020-02	10.7 ppb
2018-08-09	AH10020-03	5.56 ppb
2018-08-09	AH10020-04	12.7 ppb
2018-08-13	AH14228-01	ND
2018-08-13	AH14228-03	ND
2018-08-13	AH14228-04	8.54 ppb
2018-08-13	AH14228-05	ND
2018-08-13	AH14228-06	9.54 ppb
2018-08-13	AH14228-07	7.74 ppb
2018-11-19	AK20110-01	ND
2018-11-19	AK20110-03	ND
2018-11-19	AK20110-04	11.2 ppb
2018-11-19	AK20110-06	ND
2018-11-19	AK20110-07	11.2 ppb
2018-11-19	AK20110-08	10.9 ppb
2018-11-19	AK20110-09	5.86 ppb
2018-11-19	AK20110-10	7.04 ppb
2018-11-28	AK28065-01	9.58 ppb
2018-11-28	AK28065-02RE1	7.62 ppb
2018-11-28	AK28065-03	4.83 ppb
2018-11-28	AK28065-04	11.4 ppb
2019-02-12	BB12147-01	9.70 ppb
2019-02-12	BB12147-02	7.05 ppb
2019-02-12	BB12147-03	3.93 ppb
2019-02-12	BB12147-04	10.2 ppb
2019-03-26	BC26100-04	9.91 ppb
2019-03-26	BC26100-05	ND
2019-03-26	BC26100-06	ND
2019-05-07	BE07152-01	12.0 ppb
2019-05-07	BE07152-02	8.58 ppb
2019-05-07	BE07152-03	4.98 ppb
2019-05-07	BE07152-04	12.1 ppb
2019-06-25	BF26016-04	ND
2019-06-25	BF26016-05	1.71 ppb
2019-08-26	BH27135-01	ND
2019-08-26	BH27137-01	11.5 ppb
2019-08-26	BH27137-02	10.00 ppb
2019-08-26	BH27137-03	12.6 ppb
2019-08-26	BH27137-04	12.6 ppb
2019-08-27	BH27135-02	ND
2019-08-27	BH27135-03	ND
2019-08-27	BH27135-04	ND
2019-08-27	BH27135-05	7.52 ppb
2019-08-27	BH27135-06	12.2 ppb
2019-08-27	BH27135-07	8.47 ppb
2019-09-16	BI17137-02	12.6 ppb
2019-09-16	BI17137-04	2.79 ppb
2019-09-16	BI17137-05	ND
2019-11-06	BK07055-01	10.9 ppb
2019-11-06	BK07055-02	7.17 ppb
2019-11-06	BK07055-03	4.08 ppb
2019-11-06	BK07055-04	11.8 ppb
2019-12-12	BL13011-03	8.26 ppb
2019-12-12	BL13011-04	8.50 ppb
2019-12-12	BL13011-05	9.26 ppb
2019-12-12	BL13011-06	3.96 ppb