Bromodichloromethane

Davidson Water Inc.

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

192

Samples

Samples exceeding legal limit (MCL)

191

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	7.50 ppb	32	32	3.30 ppb - 11.5 ppb
2015	8.76 ppb	32	32	3.20 ppb - 17.0 ppb
2016	8.61 ppb	32	31	ND - 16.7 ppb
2017	7.89 ppb	32	32	4.20 ppb - 13.1 ppb
2018	7.04 ppb	32	32	3.28 ppb - 11.9 ppb
2019	7.77 ppb	32	32	2.76 ppb - 12.8 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
2014-02-03	777937T	4.40 ppb
2014-02-03	777938T	5.00 ppb
2014-02-03	777939T	4.30 ppb
2014-02-03	777940T	4.00 ppb
2014-02-03	777941T	3.30 ppb
2014-02-03	777942T	4.60 ppb
2014-02-03	777943T	4.20 ppb
2014-02-03	777944T	3.50 ppb
2014-05-06	784626T	7.40 ppb
2014-05-06	784627T	6.80 ppb
2014-05-06	784628T	6.00 ppb
2014-05-06	784629T	7.80 ppb
2014-05-06	784630T	6.00 ppb
2014-05-06	784631T	6.60 ppb
2014-05-06	784632T	6.70 ppb
2014-05-06	784633T	6.50 ppb
2014-08-05	791674T	9.90 ppb
2014-08-05	791675T	11.4 ppb
2014-08-05	791676T	11.4 ppb
2014-08-05	791677T	9.10 ppb
2014-08-05	791678T	9.10 ppb
2014-08-05	791679T	9.60 ppb
2014-08-05	791680T	11.5 ppb
2014-08-05	791681T	11.1 ppb
2014-11-03	798791T	8.30 ppb
2014-11-03	798792T	9.70 ppb
2014-11-03	798793T	9.80 ppb
2014-11-03	798796T	8.70 ppb
2014-11-03	798795T	7.50 ppb
2014-11-04	798794T	8.40 ppb
2014-11-04	798797T	8.10 ppb
2014-11-04	798798T	9.40 ppb
2015-02-02		4.70 ppb
2015-02-02		4.10 ppb
2015-02-02		3.20 ppb
2015-02-03		3.90 ppb
2015-02-03		4.80 ppb
2015-02-03		3.50 ppb
2015-02-03		4.40 ppb
2015-02-03		4.40 ppb
2015-05-04		6.30 ppb
2015-05-04		7.30 ppb
2015-05-04		7.10 ppb
2015-05-04		7.40 ppb
2015-05-04		6.20 ppb
2015-05-04		5.80 ppb
2015-05-04		6.20 ppb
2015-05-04		6.90 ppb
2015-08-04		16.0 ppb
2015-08-04		17.0 ppb
2015-08-04		17.0 ppb
2015-08-04		15.0 ppb
2015-08-04		13.0 ppb
2015-08-04		14.0 ppb
2015-08-04		16.0 ppb
2015-08-04		16.0 ppb
2015-11-03		9.20 ppb
2015-11-03		9.00 ppb
2015-11-03		8.70 ppb
2015-11-03		9.40 ppb
2015-11-03		7.60 ppb
2015-11-03		8.80 ppb
2015-11-03		8.60 ppb
2015-11-03		8.90 ppb
2016-02-03	3395358	4.70 ppb
2016-02-03	3395359	4.70 ppb
2016-02-03	3395360	4.60 ppb
2016-02-03	3395361	5.00 ppb
2016-02-03	3395362	4.10 ppb
2016-02-03	3395363	4.70 ppb
2016-02-03	3395364	4.00 ppb
2016-02-03	3395365	4.20 ppb
2016-05-02	3440234	4.90 ppb
2016-05-02	3440235	7.30 ppb
2016-05-02	3440236	7.60 ppb
2016-05-02	3440237	7.70 ppb
2016-05-02	3440238	6.30 ppb
2016-05-02	3440239	7.10 ppb
2016-05-02	3440240	6.90 ppb
2016-05-02	3440241	7.20 ppb
2016-08-01	37729_16-26076	15.0 ppb
2016-08-02	37729_16-26069	14.4 ppb
2016-08-02	37729_16-26070	16.3 ppb
2016-08-02	37729_16-26071	16.7 ppb
2016-08-02	37729_16-26072	ND
2016-08-02	37729_16-26073	12.7 ppb
2016-08-02	37729_16-26074	16.7 ppb
2016-08-02	37729_16-26075	15.7 ppb
2016-11-08	37729_16-39098	10.4 ppb
2016-11-08	37729_16-39099	11.1 ppb
2016-11-08	37729_16-39100	11.2 ppb
2016-11-08	37729_16-39101	10.1 ppb
2016-11-08	37729_16-39102	7.99 ppb
2016-11-08	37729_16-39103	9.11 ppb
2016-11-08	37729_16-39104	8.19 ppb
2016-11-08	37729_16-39105	8.97 ppb
2017-02-06	37729_17-04502	5.44 ppb
2017-02-06	37729_17-04503	6.51 ppb
2017-02-06	37729_17-04504	6.21 ppb
2017-02-06	37729_17-04505	6.51 ppb
2017-02-06	37729_17-04506	4.56 ppb
2017-02-06	37729_17-04507	4.86 ppb
2017-02-06	37729_17-04508	4.20 ppb
2017-02-06	37729_17-04509	4.80 ppb
2017-05-02	37729_17-14909	5.81 ppb
2017-05-02	37729_17-14910	9.53 ppb
2017-05-02	37729_17-14911	8.52 ppb
2017-05-02	37729_17-14912	8.56 ppb
2017-05-02	37729_17-14913	7.08 ppb
2017-05-02	37729_17-14914	6.84 ppb
2017-05-02	37729_17-14915	7.12 ppb
2017-05-02	37729_17-14916	6.40 ppb
2017-08-07	37729_17-28140	9.39 ppb
2017-08-07	37729_17-28141	11.6 ppb
2017-08-07	37729_17-28142	13.1 ppb
2017-08-07	37729_17-28143	9.05 ppb
2017-08-07	37729_17-28144	10.6 ppb
2017-08-07	37729_17-28145	13.0 ppb
2017-08-07	37729_17-28146	9.08 ppb
2017-08-07	37729_17-28147	10.0 ppb
2017-11-06	37729_17-42201	6.77 ppb
2017-11-06	37729_17-42202	9.43 ppb
2017-11-06	37729_17-42203	10.3 ppb
2017-11-06	37729_17-42204	8.49 ppb
2017-11-06	37729_17-42205	5.79 ppb
2017-11-06	37729_17-42206	10.8 ppb
2017-11-06	37729_17-42207	5.57 ppb
2017-11-06	37729_17-42208	6.76 ppb
2018-02-06	37729_18-05464	5.07 ppb
2018-02-06	37729_18-05465	4.90 ppb
2018-02-06	37729_18-05466	5.58 ppb
2018-02-06	37729_18-05467	5.43 ppb
2018-02-06	37729_18-05468	3.63 ppb
2018-02-06	37729_18-05469	5.02 ppb
2018-02-06	37729_18-05470	3.28 ppb
2018-02-06	37729_18-05471	4.06 ppb
2018-05-08	37729_18-18189	6.42 ppb
2018-05-08	37729_18-18190	7.05 ppb
2018-05-08	37729_18-18191	8.71 ppb
2018-05-08	37729_18-18192	10.0 ppb
2018-05-08	37729_18-18193	6.82 ppb
2018-05-08	37729_18-18194	8.97 ppb
2018-05-08	37729_18-18195	5.78 ppb
2018-05-08	37729_18-18196	5.57 ppb
2018-08-08	37729_18-32777	8.88 ppb
2018-08-08	37729_18-32778	10.9 ppb
2018-08-08	37729_18-32779	11.8 ppb
2018-08-08	37729_18-32780	9.69 ppb
2018-08-08	37729_18-32781	8.39 ppb
2018-08-08	37729_18-32782	11.9 ppb
2018-08-08	37729_18-32783	8.52 ppb
2018-08-08	37729_18-32784	8.11 ppb
2018-11-06	37729_18-46674	8.00 ppb
2018-11-06	37729_18-46675	8.00 ppb
2018-11-06	37729_18-46676	6.00 ppb
2018-11-06	37729_18-46677	5.00 ppb
2018-11-06	37729_18-46678	5.00 ppb
2018-11-06	37729_18-46679	8.00 ppb
2018-11-06	37729_18-46680	6.00 ppb
2018-11-06	37729_18-46681	5.00 ppb
2019-02-06	37729_19-05682	3.82 ppb
2019-02-06	37729_19-05693	4.49 ppb
2019-02-06	37729_19-05694	3.56 ppb
2019-02-06	37729_19-05695	4.54 ppb
2019-02-06	37729_19-05696	3.25 ppb
2019-02-06	37729_19-05697	4.22 ppb
2019-02-06	37729_19-05698	3.16 ppb
2019-02-06	37729_19-05699	2.76 ppb
2019-05-07	37729_19-18790	8.06 ppb
2019-05-07	37729_19-18791	11.0 ppb
2019-05-07	37729_19-18792	8.88 ppb
2019-05-07	37729_19-18793	10.4 ppb
2019-05-07	37729_19-18794	7.41 ppb
2019-05-07	37729_19-18795	9.92 ppb
2019-05-07	37729_19-18796	7.11 ppb
2019-05-07	37729_19-18797	7.03 ppb
2019-08-06	37729_19-33836	7.27 ppb
2019-08-06	37729_19-33837	11.0 ppb
2019-08-06	37729_19-33838	12.8 ppb
2019-08-06	37729_19-33839	9.72 ppb
2019-08-06	37729_19-33840	11.0 ppb
2019-08-06	37729_19-33841	10.5 ppb
2019-08-06	37729_19-33842	9.66 ppb
2019-08-06	37729_19-33843	9.61 ppb
2019-11-05	37729_19-47816	8.67 ppb
2019-11-05	37729_19-47817	7.12 ppb
2019-11-05	37729_19-47818	7.64 ppb
2019-11-05	37729_19-47819	10.5 ppb
2019-11-05	37729_19-47820	8.88 ppb
2019-11-05	37729_19-47821	9.68 ppb
2019-11-05	37729_19-47822	7.28 ppb
2019-11-05	37729_19-47823	7.64 ppb