Dibromochloromethane

Pasco Water Department

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

141

Samples

Samples exceeding legal limit (MCL)

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	0.0135 ppb	37	1	ND - 0.500 ppb
2015	0.0750 ppb	16	2	ND - 0.600 ppb
2016	ND	16	0	ND
2017	ND	16	0	ND
2018	ND	24	0	ND
2019	0.0469 ppb	32	3	ND - 0.500 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	Lab ID	Result
2014-01-14	02250	ND
2014-01-14	02249	ND
2014-01-14	02251	ND
2014-01-14	02248	ND
2014-03-12	10798	ND
2014-03-12	10804	ND
2014-03-12	10799	ND
2014-03-12	10802	ND
2014-03-12	10805	ND
2014-03-12	10801	ND
2014-03-12	10800	ND
2014-03-12	10803	ND
2014-05-27	22927	ND
2014-06-10	25312	ND
2014-06-10	25307	ND
2014-06-10	25311	ND
2014-06-10	25306	ND
2014-06-10	25310	ND
2014-06-10	25309	ND
2014-06-10	25313	ND
2014-06-10	25308	ND
2014-09-09	40838	ND
2014-09-09	40831	0.500 ppb
2014-09-09	40837	ND
2014-09-09	40836	ND
2014-09-09	40833	ND
2014-09-09	40835	ND
2014-09-09	40834	ND
2014-09-09	40832	ND
2014-12-09	54650	ND
2014-12-09	54655	ND
2014-12-09	54651	ND
2014-12-09	54649	ND
2014-12-09	54654	ND
2014-12-09	54653	ND
2014-12-09	54648	ND
2014-12-09	54652	ND
2015-03-10	10344	ND
2015-03-10	10345	ND
2015-03-10	10347	ND
2015-03-10	10346	ND
2015-06-09	26484	ND
2015-06-09	26485	ND
2015-06-09	26487	ND
2015-06-09	26486	ND
2015-09-08	42599	0.600 ppb
2015-09-08	42601	ND
2015-09-08	42605	0.600 ppb
2015-09-08	42603	ND
2015-12-08	59319	ND
2015-12-08	59320	ND
2015-12-08	59322	ND
2015-12-08	59321	ND
2016-03-08		ND
2016-03-08		ND
2016-03-08		ND
2016-03-08		ND
2016-06-14		ND
2016-06-14		ND
2016-06-14		ND
2016-06-14		ND
2016-09-13		ND
2016-09-13		ND
2016-09-13		ND
2016-09-13		ND
2016-11-08		ND
2016-11-08		ND
2016-11-08		ND
2016-11-08		ND
2017-03-14		ND
2017-03-14		ND
2017-03-14		ND
2017-03-14		ND
2017-06-14		ND
2017-06-14		ND
2017-06-14		ND
2017-06-14		ND
2017-09-12		ND
2017-09-12		ND
2017-09-12		ND
2017-09-12		ND
2017-12-12		ND
2017-12-12		ND
2017-12-12		ND
2017-12-12		ND
2018-03-13		ND
2018-03-13		ND
2018-03-13		ND
2018-03-13		ND
2018-06-12		ND
2018-06-12		ND
2018-06-12		ND
2018-06-12		ND
2018-09-11		ND
2018-09-11		ND
2018-09-11		ND
2018-09-11		ND
2018-09-12		ND
2018-09-12		ND
2018-09-12		ND
2018-09-12		ND
2018-12-11		ND
2018-12-11		ND
2018-12-11		ND
2018-12-11		ND
2018-12-11		ND
2018-12-11		ND
2018-12-11		ND
2018-12-11		ND
2019-03-13		ND
2019-03-13		ND
2019-03-13		ND
2019-03-13		ND
2019-03-13		ND
2019-03-13		ND
2019-03-13		ND
2019-03-13		0.500 ppb
2019-06-18		ND
2019-06-18		ND
2019-06-18		ND
2019-06-18		ND
2019-06-18		ND
2019-06-18		ND
2019-06-18		ND
2019-06-18		ND
2019-09-10		ND
2019-09-10		ND
2019-09-10		0.500 ppb
2019-09-10		0.500 ppb
2019-09-10		ND
2019-09-10		ND
2019-09-10		ND
2019-09-10		ND
2019-12-10		ND
2019-12-10		ND
2019-12-10		ND
2019-12-10		ND
2019-12-10		ND
2019-12-10		ND
2019-12-10		ND
2019-12-10		ND