Bromoform

City of Opelousas Water System

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

196

Samples

Samples exceeding legal limit (MCL)

116

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	0.880 ppb	36	26	ND - 2.00 ppb
2015	1.13 ppb	32	28	ND - 2.30 ppb
2016	0.871 ppb	32	30	ND - 1.70 ppb
2017	0.828 ppb	32	20	ND - 1.80 ppb
2018	0.596 ppb	32	16	ND - 2.50 ppb
2019	0.377 ppb	32	8	ND - 1.90 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
2014-02-24	680-98951-1	1.30 ppb
2014-02-24	680-98951-2	1.90 ppb
2014-02-24	680-98951-3	0.540 ppb
2014-02-24	680-98951-4	0.860 ppb
2014-02-24	680-98951-1	1.30 ppb
2014-02-24	680-98951-2	1.90 ppb
2014-02-24	680-98951-3	0.540 ppb
2014-02-24	680-98951-4	0.860 ppb
2014-06-02	680-101971-1	1.10 ppb
2014-06-02	680-101971-2	ND
2014-06-02	680-101971-3	ND
2014-06-02	680-101971-4	0.480 ppb
2014-06-02	680-101971-1	1.10 ppb
2014-06-02	680-101971-2	ND
2014-06-02	680-101971-3	ND
2014-06-02	680-101971-4	0.480 ppb
2014-08-06	680-104100-6	2.00 ppb
2014-08-06	680-104100-7	2.00 ppb
2014-08-06	680-104100-8	0.470 ppb
2014-08-06	680-104100-9	ND
2014-08-06	680-104100-6	2.00 ppb
2014-08-06	680-104100-7	2.00 ppb
2014-08-06	680-104100-8	0.470 ppb
2014-08-06	680-104100-9	ND
2014-09-08	AD96570	ND
2014-09-08	AD96570	ND
2014-10-06	AD98315	ND
2014-10-06	AD98315	ND
2014-11-05	680-107074-1	1.50 ppb
2014-11-05	680-107074-2	2.00 ppb
2014-11-05	680-107074-3	0.930 ppb
2014-11-05	680-107074-4	0.760 ppb
2014-11-05	680-107074-1	1.50 ppb
2014-11-05	680-107074-2	2.00 ppb
2014-11-05	680-107074-3	0.930 ppb
2014-11-05	680-107074-4	0.760 ppb
2015-02-10	680-109880-1	0.900 ppb
2015-02-10	680-109880-2	1.70 ppb
2015-02-10	680-109880-3	ND
2015-02-10	680-109880-4	ND
2015-02-10	680-109880-1	0.900 ppb
2015-02-10	680-109880-2	1.70 ppb
2015-02-10	680-109880-3	ND
2015-02-10	680-109880-4	ND
2015-05-06	680-112382-1	1.50 ppb
2015-05-06	680-112382-2	2.00 ppb
2015-05-06	680-112382-3	0.940 ppb
2015-05-06	680-112382-4	1.20 ppb
2015-05-06	680-112382-1	1.50 ppb
2015-05-06	680-112382-2	2.00 ppb
2015-05-06	680-112382-3	0.940 ppb
2015-05-06	680-112382-4	1.20 ppb
2015-08-05	680-115394-1	1.50 ppb
2015-08-05	680-115394-2	2.30 ppb
2015-08-05	680-115394-3	0.540 ppb
2015-08-05	680-115394-4	0.470 ppb
2015-08-05	680-115394-1	1.50 ppb
2015-08-05	680-115394-2	2.30 ppb
2015-08-05	680-115394-3	0.540 ppb
2015-08-05	680-115394-4	0.470 ppb
2015-11-12	680-119028-1	1.60 ppb
2015-11-12	680-119028-2	2.20 ppb
2015-11-12	680-119028-3	0.620 ppb
2015-11-12	680-119028-4	0.590 ppb
2015-11-12	680-119028-1	1.60 ppb
2015-11-12	680-119028-2	2.20 ppb
2015-11-12	680-119028-3	0.620 ppb
2015-11-12	680-119028-4	0.590 ppb
2016-02-11	680-121842-5	0.980 ppb
2016-02-11	680-121842-6	1.20 ppb
2016-02-11	680-121842-7	0.450 ppb
2016-02-11	680-121842-8	0.540 ppb
2016-02-11	680-121842-5	0.980 ppb
2016-02-11	680-121842-6	1.20 ppb
2016-02-11	680-121842-7	0.450 ppb
2016-02-11	680-121842-8	0.540 ppb
2016-05-10	680-125205-10	0.830 ppb
2016-05-10	680-125205-7	1.000 ppb
2016-05-10	680-125205-8	1.20 ppb
2016-05-10	680-125205-9	0.850 ppb
2016-05-10	680-125205-10	0.830 ppb
2016-05-10	680-125205-7	1.000 ppb
2016-05-10	680-125205-8	1.20 ppb
2016-05-10	680-125205-9	0.850 ppb
2016-08-09	680-128606-1	1.30 ppb
2016-08-09	680-128606-2	1.70 ppb
2016-08-09	680-128606-3	0.530 ppb
2016-08-09	680-128606-4	0.660 ppb
2016-08-09	680-128606-1	1.30 ppb
2016-08-09	680-128606-2	1.70 ppb
2016-08-09	680-128606-3	0.530 ppb
2016-08-09	680-128606-4	0.660 ppb
2016-11-08	680-131950-10	ND
2016-11-08	680-131950-11	0.630 ppb
2016-11-08	680-131950-12	0.660 ppb
2016-11-08	680-131950-9	1.40 ppb
2016-11-08	680-131950-10	ND
2016-11-08	680-131950-11	0.630 ppb
2016-11-08	680-131950-12	0.660 ppb
2016-11-08	680-131950-9	1.40 ppb
2017-02-09	35294583021	1.30 ppb
2017-02-09	35294583022	1.70 ppb
2017-02-09	35294583023	0.850 ppb
2017-02-09	35294583024	ND
2017-02-09	35294583021	1.30 ppb
2017-02-09	35294583022	1.70 ppb
2017-02-09	35294583023	0.850 ppb
2017-02-09	35294583024	ND
2017-05-05	35310763016	1.30 ppb
2017-05-05	35310763017	1.40 ppb
2017-05-05	35310763018	0.690 ppb
2017-05-05	35310763019	ND
2017-05-05	35310763016	1.30 ppb
2017-05-05	35310763017	1.40 ppb
2017-05-05	35310763018	0.690 ppb
2017-05-05	35310763019	ND
2017-08-17	35331376015	1.30 ppb
2017-08-17	35331376016	1.80 ppb
2017-08-17	35331376017	ND
2017-08-17	35331376018	ND
2017-08-17	35331376015	1.30 ppb
2017-08-17	35331376016	1.80 ppb
2017-08-17	35331376017	ND
2017-08-17	35331376018	ND
2017-11-03	35346190001	1.30 ppb
2017-11-03	35346190002	1.60 ppb
2017-11-03	35346190003	ND
2017-11-03	35346190004	ND
2017-11-03	35346190001	1.30 ppb
2017-11-03	35346190002	1.60 ppb
2017-11-03	35346190003	ND
2017-11-03	35346190004	ND
2018-02-02	35371894001	0.800 ppb
2018-02-02	35371894002	1.10 ppb
2018-02-02	35371894003	ND
2018-02-02	35371894004	ND
2018-02-02	35371894001	0.800 ppb
2018-02-02	35371894002	1.10 ppb
2018-02-02	35371894003	ND
2018-02-02	35371894004	ND
2018-05-29	35394932001	1.000 ppb
2018-05-29	35394932002	2.20 ppb
2018-05-29	35394932003	ND
2018-05-29	35394932004	ND
2018-05-29	35394932001	1.000 ppb
2018-05-29	35394932002	2.20 ppb
2018-05-29	35394932003	ND
2018-05-29	35394932004	ND
2018-08-27	35414265001	ND
2018-08-27	35414265002	ND
2018-08-27	35414265003	ND
2018-08-27	35414265004	ND
2018-08-27	35414265001	ND
2018-08-27	35414265002	ND
2018-08-27	35414265003	ND
2018-08-27	35414265004	ND
2018-11-15	35432059001	1.000 ppb
2018-11-15	35432059002	2.50 ppb
2018-11-15	35432059003	0.500 ppb
2018-11-15	35432059004	0.440 ppb
2018-11-15	35432059001	1.000 ppb
2018-11-15	35432059002	2.50 ppb
2018-11-15	35432059003	0.500 ppb
2018-11-15	35432059004	0.440 ppb
2019-02-14	35449051001	ND
2019-02-14	35449051002	1.90 ppb
2019-02-14	35449051003	ND
2019-02-14	35449051004	ND
2019-02-14	35449051001	ND
2019-02-14	35449051002	1.90 ppb
2019-02-14	35449051003	ND
2019-02-14	35449051004	ND
2019-05-15	35469471001	0.630 ppb
2019-05-15	35469471002	1.60 ppb
2019-05-15	35469471003	ND
2019-05-15	35469471004	ND
2019-05-15	35469471001	0.630 ppb
2019-05-15	35469471002	1.60 ppb
2019-05-15	35469471003	ND
2019-05-15	35469471004	ND
2019-08-01	35487151001	ND
2019-08-01	35487151002	1.90 ppb
2019-08-01	35487151003	ND
2019-08-01	35487151004	ND
2019-08-01	35487151001	ND
2019-08-01	35487151002	1.90 ppb
2019-08-01	35487151003	ND
2019-08-01	35487151004	ND
2019-11-07	35511085001	ND
2019-11-07	35511085002	ND
2019-11-07	35511085003	ND
2019-11-07	35511085004	ND
2019-11-07	35511085001	ND
2019-11-07	35511085002	ND
2019-11-07	35511085003	ND
2019-11-07	35511085004	ND