Bromoform

Quartz Hill Water District

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

128

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	9.19 ppb	21	12	ND - 29.0 ppb
2015	12.2 ppb	25	16	ND - 37.4 ppb
2016	12.4 ppb	25	16	ND - 37.3 ppb
2017	2.40 ppb	25	16	ND - 10.8 ppb
2018	10.1 ppb	16	16	3.00 ppb - 23.7 ppb
2019	16.5 ppb	16	16	4.50 ppb - 29.7 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	3761-800-0830	8.20 ppb
2014-02-25	3761-801-0845	9.90 ppb
2014-02-25	3761-802-0740	9.00 ppb
2014-02-25	3761-803-0820	11.4 ppb
2014-06-24	3761-800-1000	12.6 ppb
2014-06-24	3761-801-1017	13.8 ppb
2014-06-24	3761-802-1110	16.6 ppb
2014-06-24	3761-803-1038	11.9 ppb
2014-08-19	3761-800-0840	18.8 ppb
2014-08-19	3761-801-0827	29.0 ppb
2014-08-19	3761-802-0915	28.3 ppb
2014-08-19	3761-803-0900	23.5 ppb
2014-10-28	3761-005-0742	ND
2014-10-28	3761-006-0758	ND
2014-10-28	3761-009-0821	ND
2014-10-28	3761-012-0736	ND
2014-10-28	3761-015-0904	ND
2014-10-28	3761-016-0707	ND
2014-10-28	3761-017-0844	ND
2014-10-28	3761-018-0836	ND
2014-10-28	3761-021-0655	ND
2015-02-03	3761-800-0930	14.1 ppb
2015-02-03	3761-801-0817	13.0 ppb
2015-02-03	3761-802-0909	12.4 ppb
2015-02-03	3761-803-0835	12.8 ppb
2015-05-05	3761-800-0723	20.3 ppb
2015-05-05	3761-801-0750	20.3 ppb
2015-05-05	3761-802-0913	15.9 ppb
2015-05-05	3761-803-0831	16.6 ppb
2015-08-04	3761-800-1100	28.2 ppb
2015-08-04	3761-801-1040	37.4 ppb
2015-08-04	3761-802-0950	33.0 ppb
2015-08-04	3761-803-1025	21.9 ppb
2015-10-13	3761-005-0735	ND
2015-10-13	3761-006-0800	ND
2015-10-13	3761-009-0815	ND
2015-10-13	3761-012-0720	ND
2015-10-13	3761-015-0825	ND
2015-10-13	3761-016-0900	ND
2015-10-13	3761-017-0838	ND
2015-10-13	3761-018-0848	ND
2015-10-13	3761-021-0908	ND
2015-11-03	3761-800-0915	10.8 ppb
2015-11-03	3761-801-0928	16.5 ppb
2015-11-03	3761-802-1035	3.00 ppb
2015-11-03	3761-803-1000	27.7 ppb
2016-02-02	3761-800-0810	15.3 ppb
2016-02-02	3761-801-0758	16.0 ppb
2016-02-02	3761-802-0942	7.80 ppb
2016-02-02	3761-803-0705	15.8 ppb
2016-05-03	3761-800-1035	14.7 ppb
2016-05-03	3761-801-0920	14.0 ppb
2016-05-03	3761-802-1010	17.4 ppb
2016-05-03	3761-803-0940	14.1 ppb
2016-07-19	3761-005-0845	ND
2016-07-19	3761-006-0810	ND
2016-07-19	3761-009-0755	ND
2016-07-19	3761-012-0830	ND
2016-07-19	3761-015-0650	ND
2016-07-19	3761-016-0705	ND
2016-07-19	3761-017-0740	ND
2016-07-19	3761-018-0725	ND
2016-07-19	3761-021-0715	ND
2016-08-02	3761-800-1000	19.3 ppb
2016-08-02	3761-801-1013	12.5 ppb
2016-08-02	3761-802-0924	22.7 ppb
2016-08-02	3761-803-0950	21.1 ppb
2016-11-01	3761-800-1010	31.7 ppb
2016-11-01	3761-801-1000	31.6 ppb
2016-11-01	3761-802-1100	37.3 ppb
2016-11-01	3761-803-1020	19.7 ppb
2017-02-28	3761-800-0900	3.40 ppb
2017-02-28	3761-801-0920	2.70 ppb
2017-02-28	3761-802-1040	2.10 ppb
2017-02-28	3761-803-0940	2.10 ppb
2017-05-30	3761-800-0933	2.20 ppb
2017-05-30	3761-801-0945	1.90 ppb
2017-05-30	3761-802-1040	1.10 ppb
2017-05-30	3761-803-1005	1.30 ppb
2017-07-18	3761-005-0900	ND
2017-07-18	3761-006-0840	ND
2017-07-18	3761-009-0815	ND
2017-07-18	3761-012-0850	ND
2017-07-18	3761-015-0735	ND
2017-07-18	3761-016-0700	ND
2017-07-18	3761-017-0750	ND
2017-07-18	3761-018-0805	ND
2017-07-18	3761-021-0715	ND
2017-08-01	3761-800-1015	2.20 ppb
2017-08-01	3761-801-1000	1.70 ppb
2017-08-01	3761-802-1115	2.10 ppb
2017-08-01	3761-803-1035	1.90 ppb
2017-11-28	3761-800-0955	9.50 ppb
2017-11-28	3761-801-0935	10.8 ppb
2017-11-28	3761-802-1057	6.60 ppb
2017-11-28	3761-803-1030	8.40 ppb
2018-02-27	3761-800-0815	9.10 ppb
2018-02-27	3761-801-0800	10.5 ppb
2018-02-27	3761-802-0900	9.90 ppb
2018-02-27	3761-803-0735	12.4 ppb
2018-05-29	3761-800-0955	7.70 ppb
2018-05-29	3761-801-0945	10.1 ppb
2018-05-29	3761-802-1055	11.3 ppb
2018-05-29	3761-803-1020	7.30 ppb
2018-08-28	3761-800-0730	7.40 ppb
2018-08-28	3761-801-0755	6.40 ppb
2018-08-28	3761-802-1015	6.10 ppb
2018-08-28	3761-803-0720	3.00 ppb
2018-11-27	3761-800-0930	10.8 ppb
2018-11-27	3761-801-0915	23.7 ppb
2018-11-27	3761-802-1035	17.2 ppb
2018-11-27	3761-803-1000	9.20 ppb
2019-02-26	3761-800-0747	25.0 ppb
2019-02-26	3761-801-0735	29.7 ppb
2019-02-26	3761-802-0820	23.0 ppb
2019-02-26	3761-803-0800	26.0 ppb
2019-05-28	3761-800-1012	12.7 ppb
2019-05-28	3761-801-1031	19.8 ppb
2019-05-28	3761-802-0930	19.1 ppb
2019-05-28	3761-803-1000	11.3 ppb
2019-08-27	3761-800-0830	4.50 ppb
2019-08-27	3761-801-0820	14.8 ppb
2019-08-27	3761-802-0858	10.9 ppb
2019-08-27	3761-803-0845	11.0 ppb
2019-11-26	3761-800-0745	10.1 ppb
2019-11-26	3761-801-0725	10.5 ppb
2019-11-26	3761-802-0900	21.1 ppb
2019-11-26	3761-803-0830	13.9 ppb