Bromoform

Des Moines Water Works

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

192

Samples

Samples exceeding legal limit (MCL)

109

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	1.41 ppb	32	21	ND - 7.50 ppb
2015	0.675 ppb	32	9	ND - 2.70 ppb
2016	0.538 ppb	32	7	ND - 3.00 ppb
2017	1.23 ppb	32	14	ND - 3.50 ppb
2018	1.34 ppb	32	30	ND - 3.00 ppb
2019	1.80 ppb	32	32	0.500 ppb - 7.20 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
2014-02-25	2039203	ND
2014-02-25	2039204	7.50 ppb
2014-02-25	2039205	2.40 ppb
2014-02-25	2039206	ND
2014-02-25	2039207	2.30 ppb
2014-02-25	2039208	3.10 ppb
2014-02-26	2039209	2.30 ppb
2014-02-26	2039210	2.20 ppb
2014-05-16	2050372	ND
2014-05-16	2050373	ND
2014-05-16	2050374	ND
2014-05-16	2050375	ND
2014-05-16	2050376	ND
2014-05-16	2050377	ND
2014-05-16	2050378	ND
2014-05-16	2050379	ND
2014-08-01	2071030	0.600 ppb
2014-08-01	2071031	0.700 ppb
2014-08-01	2071032	0.900 ppb
2014-08-01	2071033	0.600 ppb
2014-08-01	2071034	0.600 ppb
2014-08-01	2071035	0.900 ppb
2014-08-01	2071036	0.900 ppb
2014-08-26	2073048	ND
2014-11-10	2090755	2.90 ppb
2014-11-10	2090756	2.10 ppb
2014-11-10	2090757	2.70 ppb
2014-11-10	2091832	2.40 ppb
2014-11-10	2091833	2.20 ppb
2014-11-10	2091834	2.40 ppb
2014-11-11	2091835	2.80 ppb
2014-11-20	2091838	2.50 ppb
2015-02-03	294346	ND
2015-02-03	294347	ND
2015-02-03	294348	2.10 ppb
2015-02-03	294349	ND
2015-02-03	294350	ND
2015-02-03	294351	ND
2015-02-03	294352	ND
2015-02-24	295022	2.50 ppb
2015-05-05	297819	ND
2015-05-05	297822	ND
2015-05-05	297826	ND
2015-05-05	297827	ND
2015-05-05	297828	ND
2015-05-05	297829	ND
2015-05-05	297830	ND
2015-05-05	297831	ND
2015-08-03	301797	ND
2015-08-03	301798	ND
2015-08-03	301799	ND
2015-08-03	301800	2.60 ppb
2015-08-04	301827	ND
2015-08-04	301828	ND
2015-08-04	301829	2.70 ppb
2015-08-04	301830	2.40 ppb
2015-11-03	307817	2.70 ppb
2015-11-03	307819	ND
2015-11-03	307820	ND
2015-11-03	307821	2.10 ppb
2015-11-03	307813	2.50 ppb
2015-11-03	307814	ND
2015-11-03	307815	ND
2015-11-03	307816	2.00 ppb
2016-02-02	310934	ND
2016-02-02	310935	ND
2016-02-02	310928	ND
2016-02-02	310929	2.10 ppb
2016-02-02	310930	ND
2016-02-02	310931	2.00 ppb
2016-02-02	310932	ND
2016-02-02	310933	ND
2016-05-03	314021	ND
2016-05-03	314022	ND
2016-05-03	314019	ND
2016-05-03	314015	2.20 ppb
2016-05-03	314016	ND
2016-05-03	314017	ND
2016-05-03	314018	ND
2016-05-03	314020	ND
2016-08-02	317531	ND
2016-08-02	317532	3.00 ppb
2016-08-02	317533	2.50 ppb
2016-08-02	317534	ND
2016-08-02	317535	ND
2016-08-02	317536	2.60 ppb
2016-08-02	317537	ND
2016-08-02	317538	ND
2016-11-01	320758	2.80 ppb
2016-11-01	320759	ND
2016-11-01	320760	ND
2016-11-01	320761	ND
2016-11-01	320764	ND
2016-11-01	320766	ND
2016-11-01	320767	ND
2016-11-01	320768	ND
2017-02-01	323776	ND
2017-02-01	323777	ND
2017-02-01	323778	ND
2017-02-01	323779	ND
2017-02-01	323780	ND
2017-02-01	323781	ND
2017-02-01	323782	ND
2017-02-01	323783	ND
2017-05-02	326932	2.10 ppb
2017-05-02	326934	ND
2017-05-02	326935	ND
2017-05-02	326936	ND
2017-05-02	326937	ND
2017-05-02	326939	ND
2017-05-05	327012	ND
2017-05-05	327013	ND
2017-08-01	330403	ND
2017-08-01	330404	2.80 ppb
2017-08-01	330405	3.00 ppb
2017-08-01	330406	2.80 ppb
2017-08-01	330407	3.40 ppb
2017-08-01	330410	3.40 ppb
2017-08-01	330408	2.50 ppb
2017-08-01	330409	3.40 ppb
2017-11-01	334002	2.90 ppb
2017-11-01	334003	ND
2017-11-01	334004	ND
2017-11-01	334005	3.50 ppb
2017-11-01	334006	2.50 ppb
2017-11-01	334007	2.20 ppb
2017-11-01	334008	2.20 ppb
2017-11-01	334009	2.50 ppb
2018-02-01	337253	3.00 ppb
2018-02-01	337254	2.20 ppb
2018-02-01	337255	2.20 ppb
2018-02-01	337256	2.60 ppb
2018-02-01	337257	3.00 ppb
2018-02-01	337258	1.80 ppb
2018-02-01	337259	2.30 ppb
2018-02-01	337260	2.30 ppb
2018-05-08	340511	1.80 ppb
2018-05-08	340512	0.900 ppb
2018-05-08	340513	0.800 ppb
2018-05-08	340514	1.000 ppb
2018-05-08	340515	0.600 ppb
2018-05-08	340516	0.400 ppb
2018-05-08	340517	0.300 ppb
2018-05-08	340518	0.300 ppb
2018-08-02	OE693171	0.600 ppb
2018-08-02	OE693172	ND
2018-08-02	OE693174	ND
2018-08-02	OE693175	0.600 ppb
2018-08-02	OE693176	1.000 ppb
2018-08-02	OE693177	2.40 ppb
2018-08-02	OE693178	2.80 ppb
2018-08-02	OE693179	1.60 ppb
2018-11-01	OE735004	1.000 ppb
2018-11-01	OE735007	0.600 ppb
2018-11-01	OE735008	1.000 ppb
2018-11-01	OE735009	1.10 ppb
2018-11-01	OE735012	1.50 ppb
2018-11-01	OE735013	1.000 ppb
2018-11-01	OE735014	1.10 ppb
2018-11-01	OE735015	1.10 ppb
2019-02-05	350125	1.70 ppb
2019-02-05	350126	1.40 ppb
2019-02-05	350127	1.80 ppb
2019-02-05	350128	1.60 ppb
2019-02-05	350129	1.90 ppb
2019-02-05	350130	1.30 ppb
2019-02-05	350131	1.40 ppb
2019-02-05	350132	1.50 ppb
2019-05-02	353057	1.30 ppb
2019-05-02	353058	1.000 ppb
2019-05-02	353059	1.20 ppb
2019-05-02	353060	0.500 ppb
2019-05-02	353061	1.30 ppb
2019-05-02	353062	0.700 ppb
2019-05-02	353063	1.30 ppb
2019-05-02	353064	1.30 ppb
2019-08-01	356490	7.00 ppb
2019-08-01	356491	1.70 ppb
2019-08-06	356622	7.20 ppb
2019-08-06	356626	1.80 ppb
2019-08-07	356621	1.50 ppb
2019-08-07	356623	2.20 ppb
2019-08-07	356624	2.30 ppb
2019-08-07	356625	2.40 ppb
2019-11-05	359900	2.60 ppb
2019-11-05	359901	0.900 ppb
2019-11-05	359902	0.800 ppb
2019-11-05	359903	1.40 ppb
2019-11-05	359904	1.40 ppb
2019-11-05	359905	0.700 ppb
2019-11-05	359906	1.30 ppb
2019-11-05	359907	1.30 ppb