Bromoform

Gretna 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

210

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	ND	50	0	ND
2015	0.0244 ppb	32	2	ND - 0.390 ppb
2016	0.195 ppb	32	14	ND - 0.630 ppb
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
2014-01-07	680-97671-3	ND
2014-01-07	680-97671-4	ND
2014-01-07	680-97671-5	ND
2014-01-07	680-97671-6	ND
2014-01-07	680-97671-3	ND
2014-01-07	680-97671-4	ND
2014-01-07	680-97671-5	ND
2014-01-07	680-97671-6	ND
2014-02-04	680-98432-1	ND
2014-02-04	680-98432-2	ND
2014-02-04	680-98432-3	ND
2014-02-04	680-98432-4	ND
2014-02-04	AD88741	ND
2014-02-04	680-98432-1	ND
2014-02-04	680-98432-2	ND
2014-02-04	680-98432-3	ND
2014-02-04	680-98432-4	ND
2014-02-04	AD88741	ND
2014-03-05	680-99259-16	ND
2014-03-05	680-99259-17	ND
2014-03-05	680-99259-18	ND
2014-03-05	680-99259-19	ND
2014-03-05	680-99259-16	ND
2014-03-05	680-99259-17	ND
2014-03-05	680-99259-18	ND
2014-03-05	680-99259-19	ND
2014-05-06	680-101187-18	ND
2014-05-06	680-101187-19	ND
2014-05-06	680-101187-20	ND
2014-05-06	680-101187-21	ND
2014-05-06	680-101187-18	ND
2014-05-06	680-101187-19	ND
2014-05-06	680-101187-20	ND
2014-05-06	680-101187-21	ND
2014-08-07	680-104089-1	ND
2014-08-07	680-104089-2	ND
2014-08-07	680-104089-3	ND
2014-08-07	680-104089-4	ND
2014-08-07	680-104089-1	ND
2014-08-07	680-104089-2	ND
2014-08-07	680-104089-3	ND
2014-08-07	680-104089-4	ND
2014-11-03	680-107007-1	ND
2014-11-03	680-107007-2	ND
2014-11-03	680-107007-3	ND
2014-11-03	680-107007-4	ND
2014-11-03	680-107007-1	ND
2014-11-03	680-107007-2	ND
2014-11-03	680-107007-3	ND
2014-11-03	680-107007-4	ND
2015-02-04	680-109728-1	ND
2015-02-04	680-109728-2	ND
2015-02-04	680-109728-3	ND
2015-02-04	680-109728-4	ND
2015-02-04	680-109728-1	ND
2015-02-04	680-109728-2	ND
2015-02-04	680-109728-3	ND
2015-02-04	680-109728-4	ND
2015-05-06	680-112387-12	ND
2015-05-06	680-112387-13	ND
2015-05-06	680-112387-14	ND
2015-05-06	680-112387-15	ND
2015-05-06	680-112387-12	ND
2015-05-06	680-112387-13	ND
2015-05-06	680-112387-14	ND
2015-05-06	680-112387-15	ND
2015-08-05	680-115329-2	ND
2015-08-05	680-115329-3	ND
2015-08-05	680-115329-4	ND
2015-08-05	680-115329-5	ND
2015-08-05	680-115329-2	ND
2015-08-05	680-115329-3	ND
2015-08-05	680-115329-4	ND
2015-08-05	680-115329-5	ND
2015-11-03	680-118699-2	ND
2015-11-03	680-118699-3	ND
2015-11-03	680-118699-4	ND
2015-11-03	680-118699-5	0.390 ppb
2015-11-03	680-118699-2	ND
2015-11-03	680-118699-3	ND
2015-11-03	680-118699-4	ND
2015-11-03	680-118699-5	0.390 ppb
2016-02-02	680-121528-17	ND
2016-02-02	680-121528-18	ND
2016-02-02	680-121528-19	ND
2016-02-02	680-121528-20	ND
2016-02-02	680-121528-17	ND
2016-02-02	680-121528-18	ND
2016-02-02	680-121528-19	ND
2016-02-02	680-121528-20	ND
2016-05-03	680-124872-10	ND
2016-05-03	680-124872-11	ND
2016-05-03	680-124872-12	ND
2016-05-03	680-124872-13	ND
2016-05-03	680-124872-10	ND
2016-05-03	680-124872-11	ND
2016-05-03	680-124872-12	ND
2016-05-03	680-124872-13	ND
2016-08-02	680-128313-3	0.630 ppb
2016-08-02	680-128313-4	0.530 ppb
2016-08-02	680-128313-5	0.620 ppb
2016-08-02	680-128313-6	0.600 ppb
2016-08-02	680-128313-3	0.630 ppb
2016-08-02	680-128313-4	0.530 ppb
2016-08-02	680-128313-5	0.620 ppb
2016-08-02	680-128313-6	0.600 ppb
2016-11-02	680-131689-3	0.270 ppb
2016-11-02	680-131689-4	ND
2016-11-02	680-131689-5	0.250 ppb
2016-11-02	680-131689-6	0.220 ppb
2016-11-02	680-131689-3	0.270 ppb
2016-11-02	680-131689-4	ND
2016-11-02	680-131689-5	0.250 ppb
2016-11-02	680-131689-6	0.220 ppb
2017-02-01	35292834001	ND
2017-02-01	35292834002	ND
2017-02-01	35292834003	ND
2017-02-01	35292834004	ND
2017-02-01	35292834001	ND
2017-02-01	35292834002	ND
2017-02-01	35292834003	ND
2017-02-01	35292834004	ND
2017-05-03	35310509003	ND
2017-05-03	35310509003	ND
2017-05-04	35310509001	ND
2017-05-04	35310509002	ND
2017-05-04	35310509004	ND
2017-05-04	35310509001	ND
2017-05-04	35310509002	ND
2017-05-04	35310509004	ND
2017-08-02	35327801001	ND
2017-08-02	35327801002	ND
2017-08-02	35327801003	ND
2017-08-02	35327801004	ND
2017-08-02	35327801001	ND
2017-08-02	35327801002	ND
2017-08-02	35327801003	ND
2017-08-02	35327801004	ND
2017-11-08	35347259001	ND
2017-11-08	35347259002	ND
2017-11-08	35347259003	ND
2017-11-08	35347259004	ND
2017-11-08	35347259001	ND
2017-11-08	35347259002	ND
2017-11-08	35347259003	ND
2017-11-08	35347259004	ND
2018-02-01	35371671001	ND
2018-02-01	35371671002	ND
2018-02-01	35371671003	ND
2018-02-01	35371671004	ND
2018-02-01	35371671001	ND
2018-02-01	35371671002	ND
2018-02-01	35371671003	ND
2018-02-01	35371671004	ND
2018-05-10	35391806001	ND
2018-05-10	35391806002	ND
2018-05-10	35391806003	ND
2018-05-10	35391806004	ND
2018-05-10	35391806001	ND
2018-05-10	35391806002	ND
2018-05-10	35391806003	ND
2018-05-10	35391806004	ND
2018-08-06	35409217001	ND
2018-08-06	35409217002	ND
2018-08-06	35409217003	ND
2018-08-06	35409217004	ND
2018-08-06	35409217001	ND
2018-08-06	35409217002	ND
2018-08-06	35409217003	ND
2018-08-06	35409217004	ND
2018-11-08	35430061001	ND
2018-11-08	35430061002	ND
2018-11-08	35430061003	ND
2018-11-08	35430061004	ND
2018-11-08	35430061001	ND
2018-11-08	35430061002	ND
2018-11-08	35430061003	ND
2018-11-08	35430061004	ND
2019-02-12	35447890001	ND
2019-02-12	35447890002	ND
2019-02-12	35447890003	ND
2019-02-12	35447890004	ND
2019-02-12	35447890001	ND
2019-02-12	35447890002	ND
2019-02-12	35447890003	ND
2019-02-12	35447890004	ND
2019-05-08	35467870001	ND
2019-05-08	35467870002	ND
2019-05-08	35467870003	ND
2019-05-08	35467870004	ND
2019-05-08	35467870001	ND
2019-05-08	35467870002	ND
2019-05-08	35467870003	ND
2019-05-08	35467870004	ND
2019-08-09	35489005001	ND
2019-08-09	35489005002	ND
2019-08-09	35489005003	ND
2019-08-09	35489005004	ND
2019-08-09	35489005001	ND
2019-08-09	35489005002	ND
2019-08-09	35489005003	ND
2019-08-09	35489005004	ND
2019-11-13	35512510001	ND
2019-11-13	35512510002	ND
2019-11-13	35512510003	ND
2019-11-13	35512510004	ND
2019-11-13	35512510001	ND
2019-11-13	35512510002	ND
2019-11-13	35512510003	ND
2019-11-13	35512510004	ND