Bromoform

St Marys Area Water Authority

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

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	0.0380 ppb	16	1	ND - 0.608 ppb
2015	ND	16	0	ND
2016	ND	16	0	ND
2017	ND	16	0	ND
2018	ND	16	0	ND
2019	ND	16	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
2014-03-11	14031140-001	ND
2014-03-11	14031138-001	ND
2014-03-11	14031136-001	ND
2014-03-11	14031137-001	ND
2014-06-10	14061407-001	ND
2014-06-10	14061410-001	ND
2014-06-10	14061405-001	ND
2014-06-10	14061421-001	ND
2014-09-09	14091161-001	ND
2014-09-09	14091163-001	ND
2014-09-09	14091162-001	0.608 ppb
2014-09-09	14091160-001	ND
2014-12-09	14121258-001	ND
2014-12-09	14121261-001	ND
2014-12-09	14121256-001	ND
2014-12-09	14121253-001	ND
2015-03-10	12583652	ND
2015-03-10	12583641	ND
2015-03-10	12583663	ND
2015-03-10	12583630	ND
2015-06-09	12962226	ND
2015-06-09	12962215	ND
2015-06-09	12962248	ND
2015-06-09	12962237	ND
2015-09-08	13340809	ND
2015-09-08	13340785	ND
2015-09-08	13340792	ND
2015-09-08	13340772	ND
2015-12-09	13704700	ND
2015-12-09	13704723	ND
2015-12-09	13704714	ND
2015-12-09	13704692	ND
2016-03-15	14054086	ND
2016-03-15	14054102	ND
2016-03-15	14054112	ND
2016-03-15	14054096	ND
2016-06-14	14505576	ND
2016-06-14	14505564	ND
2016-06-14	14505581	ND
2016-06-14	14505586	ND
2016-09-13	15013770	ND
2016-09-13	15013768	ND
2016-09-13	15013771	ND
2016-09-13	15013769	ND
2016-12-13	15459168	ND
2016-12-13	15459160	ND
2016-12-13	15459181	ND
2016-12-13	15459156	ND
2017-03-14	15879214	ND
2017-03-14	15879193	ND
2017-03-14	15879187	ND
2017-03-14	15879203	ND
2017-06-13	16354728	ND
2017-06-13	16354703	ND
2017-06-13	16354699	ND
2017-06-13	16354718	ND
2017-09-12	16820823	ND
2017-09-12	16820830	ND
2017-09-12	16820818	ND
2017-09-12	16820826	ND
2017-12-12	17247068	ND
2017-12-12	17247086	ND
2017-12-12	17247054	ND
2017-12-12	17247072	ND
2018-03-15	(703) Ginthe	ND
2018-03-15	(704) Windfa	ND
2018-03-15	(702) Fox Ta	ND
2018-03-15	(701 ) Jet	ND
2018-06-12	(701 ) Jet	ND
2018-06-12	(702) Fox Ta	ND
2018-06-12	(703) Ginthe	ND
2018-06-12	(704) Windfa	ND
2018-09-11	(702) Fox Ta	ND
2018-09-11	(701 ) Jet	ND
2018-09-11	(703) Ginthe	ND
2018-09-11	(704) Windfa	ND
2018-12-11	(702) Fox Ta	ND
2018-12-11	(703) Ginthe	ND
2018-12-11	(701 ) Jet	ND
2018-12-11	(704) Windfa	ND
2019-03-12	(704) Windfa	ND
2019-03-12	(703) Ginthe	ND
2019-03-12	(702) Fox Ta	ND
2019-03-12	(701 ) Jet	ND
2019-06-11	(701 ) Jet	ND
2019-06-11	(702) Fox Ta	ND
2019-06-11	(703) Ginthe	ND
2019-06-11	(704) Windfa	ND
2019-09-10	(701 ) Jet	ND
2019-09-10	(702) Fox Ta	ND
2019-09-10	(703) Ginthe	ND
2019-09-10	(704) Windfa	ND
2019-12-10	9L16180-01	ND
2019-12-10	9L16180-04	ND
2019-12-10	9L16180-03	ND
2019-12-10	9L16180-02	ND