Bromoform

Milwaukee Waterworks

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

165

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	0.0294 ppb	34	2	ND - 0.500 ppb
2015	0.109 ppb	34	7	ND - 0.600 ppb
2016	0.288 ppb	25	19	ND - 0.500 ppb
2017	0.446 ppb	24	24	0.400 ppb - 0.600 ppb
2018	0.392 ppb	24	24	0.300 ppb - 0.500 ppb
2019	0.371 ppb	24	24	0.300 ppb - 0.500 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
2014-02-18	2976345,47	ND
2014-02-18	2976339,41	ND
2014-02-18	2976315,17	ND
2014-02-18	2976333,35	ND
2014-02-18	2976327,29	ND
2014-02-18	2976321,23	ND
2014-02-18	2976309,11	ND
2014-02-18	2976303,05	ND
2014-05-21	3031751,53	ND
2014-05-21	3031733,35	ND
2014-05-21	3031757,59	ND
2014-05-21	3031727,29	ND
2014-05-21	3031715,17	ND
2014-05-21	3031721,23	ND
2014-05-21	3031745,47	ND
2014-05-21	3031739,41	ND
2014-08-18	3085065	ND
2014-08-18	3086025,27	ND
2014-08-18	3086037,39	ND
2014-08-18	3086043,45	ND
2014-08-18	3086031,33	ND
2014-08-19	3086089	ND
2014-08-19	3086541,43	ND
2014-08-19	3086547,49	ND
2014-08-19	3086529,31	ND
2014-08-19	3086535,37	ND
2014-11-18	3141107,09	ND
2014-11-18	3141112,14	ND
2014-11-18	3141087,89	ND
2014-11-18	3141117,19	ND
2014-11-18	3141102,04	ND
2014-11-18	3141092,94	ND
2014-11-18	3141097,99	0.500 ppb
2014-11-18	3141082,84	0.500 ppb
2015-02-17	3189159,61	ND
2015-02-17	3189193,95	ND
2015-02-17	3189186,88	ND
2015-02-17	3189207,09	ND
2015-02-17	3189200,02	ND
2015-02-17	3189172,74	ND
2015-02-17	3189166,68	ND
2015-02-17	3189179,81	ND
2015-05-19	3245958,60	ND
2015-05-19	3245968,70	ND
2015-05-19	3245978,80	ND
2015-05-19	3245983,85	ND
2015-05-19	3245963,65	ND
2015-05-19	3245973,75	ND
2015-05-19	3245993,95	0.500 ppb
2015-05-19	3245988,90	0.500 ppb
2015-08-18	3303599	ND
2015-08-18	3304265,67	ND
2015-08-18	3304270,72	ND
2015-08-18	3304253,55	0.500 ppb
2015-08-18	3304258,60	0.500 ppb
2015-08-19	3304985	ND
2015-08-19	3305454,56	ND
2015-08-19	3305465,67	0.500 ppb
2015-08-19	3305460,62	0.600 ppb
2015-08-19	3305470,72	0.600 ppb
2015-11-19	3362659,61	ND
2015-11-19	3362694,96	ND
2015-11-19	3362689,91	ND
2015-11-19	3362699,701	ND
2015-11-19	3362664,66	ND
2015-11-19	3362704,06	ND
2015-11-19	3362676,78	ND
2015-11-19	3362671,73	ND
2016-02-23	3405120-21	ND
2016-02-23	3405126-27	ND
2016-02-23	3405122-23	ND
2016-02-23	3405124-25	ND
2016-02-23	3405130-31	ND
2016-02-23	3405128-29	ND
2016-05-18	3452925-26	0.300 ppb
2016-05-18	3452927-28	0.300 ppb
2016-05-18	3452933-34	0.400 ppb
2016-05-18	3452929-30	0.400 ppb
2016-05-18	3452931-32	0.400 ppb
2016-05-18	3452935-36	0.400 ppb
2016-08-24	3536504-05	0.400 ppb
2016-08-24	3536514-15	0.400 ppb
2016-08-25	3536516-17	0.300 ppb
2016-08-25	3536520-21	0.400 ppb
2016-08-25	3536518-19	0.400 ppb
2016-08-25	3536522-23	0.500 ppb
2016-09-15	3546842-43	0.400 ppb
2016-11-15	3587013-14	0.300 ppb
2016-11-15	3587011-12	0.300 ppb
2016-11-15	3587005-06	0.400 ppb
2016-11-15	3587015-16	0.400 ppb
2016-11-15	3587009-10	0.400 ppb
2016-11-15	3587007-08	0.400 ppb
2017-02-20	3642404-05	0.400 ppb
2017-02-20	3642400-01	0.400 ppb
2017-02-20	3642408-09	0.400 ppb
2017-02-20	3642406-07	0.400 ppb
2017-02-20	3642410-11	0.400 ppb
2017-02-20	3642402-03	0.400 ppb
2017-05-22	3698707-08	0.400 ppb
2017-05-22	3698715-16	0.400 ppb
2017-05-22	3698709-10	0.400 ppb
2017-05-22	3698717-18	0.400 ppb
2017-05-22	3698713-14	0.400 ppb
2017-05-22	3698711-12	0.400 ppb
2017-08-17	3760782-83	0.400 ppb
2017-08-17	3760784-85	0.400 ppb
2017-08-17	3760790-91	0.500 ppb
2017-08-17	3760788-89	0.500 ppb
2017-08-17	3760792-93	0.500 ppb
2017-08-17	3760786-87	0.500 ppb
2017-11-15	3822385-86	0.500 ppb
2017-11-15	3822389-90	0.500 ppb
2017-11-15	3822383-84	0.500 ppb
2017-11-15	3822387-88	0.500 ppb
2017-11-15	3822391-92	0.500 ppb
2017-11-15	3822393-94	0.600 ppb
2018-02-19	3875568-69	0.300 ppb
2018-02-19	3875570-71	0.300 ppb
2018-02-19	3875576-77	0.400 ppb
2018-02-19	3875574-75	0.400 ppb
2018-02-19	3875572-73	0.400 ppb
2018-02-19	3875578-79	0.400 ppb
2018-05-21	3942383-84	0.300 ppb
2018-05-21	3942387-88	0.300 ppb
2018-05-21	3942385-86	0.300 ppb
2018-05-21	3942377-78	0.300 ppb
2018-05-21	3942379-80	0.300 ppb
2018-05-21	3942381-82	0.300 ppb
2018-08-20	4028803-04	0.500 ppb
2018-08-20	4028801-02	0.500 ppb
2018-08-20	4028809-10	0.500 ppb
2018-08-20	4028811-12	0.500 ppb
2018-08-20	4028807-08	0.500 ppb
2018-08-20	4028805-06	0.500 ppb
2018-11-15	4123908-09	0.400 ppb
2018-11-15	4123900-01	0.400 ppb
2018-11-15	4123910-11	0.400 ppb
2018-11-15	4123906-07	0.400 ppb
2018-11-15	4123904-05	0.400 ppb
2018-11-15	4123902-03	0.400 ppb
2019-02-18	4202101-02	0.300 ppb
2019-02-18	4202109-10	0.300 ppb
2019-02-18	4202099-100	0.300 ppb
2019-02-18	4202103-04	0.300 ppb
2019-02-18	4202105-06	0.300 ppb
2019-02-18	4202107-08	0.400 ppb
2019-05-20	4301657-58	0.300 ppb
2019-05-20	4301659-60	0.400 ppb
2019-05-20	4301653-54	0.400 ppb
2019-05-20	4301661-62	0.400 ppb
2019-05-20	4301663-64	0.400 ppb
2019-05-20	4301655-56	0.400 ppb
2019-08-19	4391818-19	0.400 ppb
2019-08-19	4391824-25	0.400 ppb
2019-08-19	4391816-17	0.400 ppb
2019-08-19	4391820-21	0.400 ppb
2019-08-19	4391814-15	0.400 ppb
2019-08-19	4391822-23	0.500 ppb
2019-11-18	4489288-89	0.300 ppb
2019-11-18	4489282-83	0.300 ppb
2019-11-18	4489286-87	0.400 ppb
2019-11-18	4489280-81	0.400 ppb
2019-11-18	4489284-85	0.400 ppb
2019-11-18	4489278-79	0.400 ppb