Bromoform

City of Bremerton

Bromoform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromoform 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

209

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	0.0971 ppb	34	3	ND - 2.30 ppb
2015	0.0750 ppb	32	2	ND - 1.40 ppb
2016	0.279 ppb	33	8	ND - 2.30 ppb
2017	0.130 ppb	33	2	ND - 2.20 ppb
2018	0.184 ppb	32	6	ND - 2.30 ppb
2019	0.175 ppb	45	5	ND - 3.39 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.5 ppb

The EWG Health Guideline of 0.5 ppb for bromoform 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
2014-02-20	07688	ND
2014-02-20	07688	ND
2014-03-11	10665	ND
2014-03-11	10658	ND
2014-03-11	10662	ND
2014-03-11	10666	ND
2014-03-11	10659	ND
2014-03-11	10664	ND
2014-03-11	10661	ND
2014-03-11	10660	ND
2014-06-10	25284	ND
2014-06-10	25289	0.500 ppb
2014-06-10	25281	ND
2014-06-10	25287	ND
2014-06-10	25286	ND
2014-06-10	25288	0.500 ppb
2014-06-10	25282	ND
2014-06-10	25285	ND
2014-09-09	40622	ND
2014-09-09	40615	ND
2014-09-09	40617	ND
2014-09-09	40619	ND
2014-09-09	40621	ND
2014-09-09	40618	ND
2014-09-09	40616	ND
2014-09-09	40620	ND
2014-12-16	56128	ND
2014-12-16	56127	ND
2014-12-16	56126	ND
2014-12-16	56125	ND
2014-12-16	56123	ND
2014-12-16	56129	ND
2014-12-16	56130	2.30 ppb
2014-12-16	56124	ND
2015-03-10	10605	ND
2015-03-10	10606	1.000 ppb
2015-03-10	10600	ND
2015-03-10	10602	ND
2015-03-10	10601	ND
2015-03-10	10603	ND
2015-03-10	10599	ND
2015-03-10	10604	1.40 ppb
2015-06-09	26644	ND
2015-06-09	26643	ND
2015-06-09	26649	ND
2015-06-09	26651	ND
2015-06-09	26652	ND
2015-06-09	26650	ND
2015-06-09	26648	ND
2015-06-09	26642	ND
2015-09-15	44450	ND
2015-09-15	44449	ND
2015-09-15	44455	ND
2015-09-15	44453	ND
2015-09-15	44454	ND
2015-09-15	44452	ND
2015-09-15	44456	ND
2015-09-15	44451	ND
2015-12-07	59139	ND
2015-12-07	59135	ND
2015-12-07	59140	ND
2015-12-07	59136	ND
2015-12-07	59137	ND
2015-12-07	59133	ND
2015-12-07	59134	ND
2015-12-07	59138	ND
2016-03-08		ND
2016-03-08		ND
2016-03-08		ND
2016-03-08		ND
2016-03-08		ND
2016-03-08		ND
2016-03-08		ND
2016-03-08		ND
2016-06-02		ND
2016-06-07		1.20 ppb
2016-06-07		ND
2016-06-07		1.10 ppb
2016-06-07		1.20 ppb
2016-06-07		ND
2016-06-07		0.700 ppb
2016-06-07		2.30 ppb
2016-06-07		1.000 ppb
2016-09-13		0.600 ppb
2016-09-13		ND
2016-09-13		ND
2016-09-13		1.10 ppb
2016-09-13		ND
2016-09-13		ND
2016-09-13		ND
2016-09-13		ND
2016-12-06		ND
2016-12-06		ND
2016-12-06		ND
2016-12-06		ND
2016-12-06		ND
2016-12-06		ND
2016-12-06		ND
2016-12-06		ND
2017-03-07		ND
2017-03-07		ND
2017-03-07		ND
2017-03-07		ND
2017-03-07		2.10 ppb
2017-03-07		ND
2017-03-07		2.20 ppb
2017-03-07		ND
2017-06-06		ND
2017-06-06		ND
2017-06-06		ND
2017-06-06		ND
2017-06-06		ND
2017-06-06		ND
2017-06-06		ND
2017-06-06		ND
2017-06-06		ND
2017-09-12		ND
2017-09-12		ND
2017-09-12		ND
2017-09-12		ND
2017-09-12		ND
2017-09-12		ND
2017-09-12		ND
2017-09-12		ND
2017-12-05		ND
2017-12-05		ND
2017-12-05		ND
2017-12-05		ND
2017-12-05		ND
2017-12-05		ND
2017-12-05		ND
2017-12-05		ND
2018-03-06		ND
2018-03-06		ND
2018-03-06		ND
2018-03-06		ND
2018-03-06		ND
2018-03-06		ND
2018-03-06		ND
2018-03-06		ND
2018-06-05		ND
2018-06-05		ND
2018-06-05		ND
2018-06-05		ND
2018-06-05		ND
2018-06-05		ND
2018-06-05		ND
2018-06-05		ND
2018-09-10		0.500 ppb
2018-09-10		ND
2018-09-10		ND
2018-09-10		ND
2018-09-10		ND
2018-09-10		ND
2018-09-10		ND
2018-09-10		0.800 ppb
2018-12-03		0.600 ppb
2018-12-03		ND
2018-12-03		1.000 ppb
2018-12-03		ND
2018-12-03		0.700 ppb
2018-12-03		ND
2018-12-03		ND
2018-12-03		2.30 ppb
2019-03-05		1.000 ppb
2019-03-05		ND
2019-03-05		ND
2019-03-05		0.500 ppb
2019-03-05		ND
2019-03-05		ND
2019-03-05		ND
2019-03-05		2.00 ppb
2019-04-29		ND
2019-04-29		ND
2019-04-29		ND
2019-04-29		ND
2019-04-30		ND
2019-06-05		ND
2019-06-05		ND
2019-06-05		ND
2019-06-05		ND
2019-06-05		ND
2019-06-11		ND
2019-06-11		ND
2019-06-11		ND
2019-06-11		ND
2019-06-11		ND
2019-06-11		ND
2019-06-11		ND
2019-06-11		ND
2019-07-30		ND
2019-07-30		ND
2019-07-30		ND
2019-09-10		1.000 ppb
2019-09-10		ND
2019-09-10		ND
2019-09-10		ND
2019-09-10		ND
2019-09-10		3.39 ppb
2019-09-10		ND
2019-09-10		ND
2019-12-03		ND
2019-12-03		ND
2019-12-03		ND
2019-12-03		ND
2019-12-03		ND
2019-12-03		ND
2019-12-03		ND
2019-12-03		ND