Bromoform

Bcwsa Main Lower South

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

186

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	0.0429 ppb	28	2	ND - 0.700 ppb
2015	ND	30	0	ND
2016	ND	32	0	ND
2017	ND	32	0	ND
2018	ND	32	0	ND
2019	ND	32	0	ND

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
2014-02-12	140006593	ND
2014-02-12	140006594	ND
2014-02-12	140006595	ND
2014-02-12	140006596	ND
2014-02-12	140006597	ND
2014-02-12	140006598	ND
2014-02-12	140006599	ND
2014-02-12	140006600	ND
2014-05-15	140020345	ND
2014-05-15	140020346	ND
2014-05-15	140020347	ND
2014-05-15	140020348	ND
2014-05-15	140020349	ND
2014-05-15	140020350	ND
2014-05-15	140020351	ND
2014-05-15	140020352	ND
2014-08-15	140036351	ND
2014-08-15	140036352	ND
2014-08-15	140036353	ND
2014-08-15	140036354	ND
2014-08-15	140036355	ND
2014-08-15	140036356	0.500 ppb
2014-08-15	140036357	0.700 ppb
2014-08-15	140036358	ND
2014-11-14	140051789	ND
2014-11-14	140051790	ND
2014-11-14	140051791	ND
2014-11-14	140051792	ND
2015-02-10	12389774	ND
2015-02-10	12389775	ND
2015-02-10	12389776	ND
2015-02-10	12389777	ND
2015-05-14	12737955	ND
2015-05-14	12737956	ND
2015-05-14	12737957	ND
2015-05-14	12737951	ND
2015-05-14	12737958	ND
2015-05-14	12737952	ND
2015-05-14	12737953	ND
2015-05-14	12737954	ND
2015-08-14	13123243	ND
2015-08-14	13251923	ND
2015-08-14	13123244	ND
2015-08-14	13251924	ND
2015-08-14	13123245	ND
2015-08-14	13123239	ND
2015-08-14	13123246	ND
2015-08-14	13123240	ND
2015-08-14	13123241	ND
2015-08-14	13123242	ND
2015-11-10	13502779	ND
2015-11-10	13502774	ND
2015-11-10	13502781	ND
2015-11-10	13502775	ND
2015-11-10	13502776	ND
2015-11-10	13502777	ND
2015-11-10	13502778	ND
2015-11-10	13502780	ND
2016-02-16	13858449	ND
2016-02-16	13858444	ND
2016-02-16	13858451	ND
2016-02-16	13858445	ND
2016-02-16	13858446	ND
2016-02-16	13858447	ND
2016-02-16	13858448	ND
2016-02-16	13858450	ND
2016-05-17	14236837	ND
2016-05-17	14236843	ND
2016-05-17	14236849	ND
2016-05-17	14236855	ND
2016-05-17	14236861	ND
2016-05-17	14236867	ND
2016-05-17	14236873	ND
2016-05-17	14236879	ND
2016-08-16	14720308	ND
2016-08-16	14720314	ND
2016-08-16	14720320	ND
2016-08-16	14720326	ND
2016-08-16	14720332	ND
2016-08-16	14720338	ND
2016-08-16	14720343	ND
2016-08-16	14720351	ND
2016-11-11	15213524	ND
2016-11-11	15213530	ND
2016-11-11	15213536	ND
2016-11-11	15213542	ND
2016-11-11	15213548	ND
2016-11-11	15213554	ND
2016-11-11	15213560	ND
2016-11-11	15213566	ND
2017-02-13	15642962	ND
2017-02-13	15642968	ND
2017-02-13	15642974	ND
2017-02-13	15642980	ND
2017-02-13	15642986	ND
2017-02-13	15642992	ND
2017-02-13	15642998	ND
2017-02-13	15643004	ND
2017-05-12	16080308	ND
2017-05-12	16080313	ND
2017-05-12	16080318	ND
2017-05-17	16242928	ND
2017-05-17	16242934	ND
2017-05-17	16242939	ND
2017-05-17	16242945	ND
2017-05-17	16242951	ND
2017-08-14	16550964	ND
2017-08-14	16550970	ND
2017-08-14	16550976	ND
2017-08-14	16550982	ND
2017-08-14	16550988	ND
2017-08-14	16550994	ND
2017-08-14	16551000	ND
2017-08-14	16551006	ND
2017-11-13	17011202	ND
2017-11-13	17011208	ND
2017-11-13	17011214	ND
2017-11-13	17011219	ND
2017-11-13	17011227	ND
2017-12-01	17011354	ND
2017-12-01	17011359	ND
2017-12-01	17011364	ND
2018-02-16	8022971-01	ND
2018-02-16	8022811-02	ND
2018-02-16	8022811-03	ND
2018-02-16	8022811-04	ND
2018-02-16	8022811-05	ND
2018-02-16	8022811-06	ND
2018-02-16	8022811-07	ND
2018-02-16	8022811-08	ND
2018-05-17	8053554-01	ND
2018-05-17	8053554-02	ND
2018-05-17	8053554-03	ND
2018-05-17	8053554-04	ND
2018-05-17	8053554-05	ND
2018-05-17	8053554-06	ND
2018-05-17	8053554-07	ND
2018-05-17	8053554-08	ND
2018-08-13	8082937-01	ND
2018-08-13	8082937-02	ND
2018-08-13	8082937-03	ND
2018-08-13	8082937-04	ND
2018-08-13	8082937-05	ND
2018-08-13	8082937-06	ND
2018-08-13	8082937-07	ND
2018-08-13	8082937-08	ND
2018-11-12	8032032-01RE	ND
2018-11-14	8032034-01	ND
2018-11-14	8032035-01	ND
2018-11-14	8032036-01	ND
2018-11-14	8032037-01	ND
2018-11-14	8032038-01	ND
2018-11-14	8032039-01	ND
2018-11-15	8034181-01	ND
2019-02-13	9004485-01	ND
2019-02-13	9004486-01	ND
2019-02-13	9004487-01	ND
2019-02-14	9004483-01	ND
2019-02-14	9004484-01	ND
2019-02-14	9004488-01	ND
2019-02-14	9004489-01	ND
2019-02-15	9004482-01	ND
2019-05-13	9015730-01	ND
2019-05-13	9015731-01	ND
2019-05-13	9015732-01	ND
2019-05-13	9015733-01	ND
2019-05-13	9015734-01	ND
2019-05-13	9015735-01	ND
2019-05-13	9015736-01	ND
2019-05-13	9015737-01	ND
2019-08-12	9028010-01	ND
2019-08-12	9028011-01	ND
2019-08-12	9028012-01	ND
2019-08-12	9028013-01	ND
2019-08-12	9028014-01	ND
2019-08-12	9028015-01	ND
2019-08-12	9028016-01	ND
2019-08-12	9028017-01	ND
2019-11-11	9112242-01	ND
2019-11-11	9112242-02	ND
2019-11-11	9112242-03	ND
2019-11-11	9112242-04	ND
2019-11-11	9112242-05	ND
2019-11-11	9112242-06	ND
2019-11-11	9112242-07	ND
2019-11-11	9112242-08	ND