Chloroform

Bossier City Water System

Chloroform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Chloroform and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Read More.

In addition to tap water disinfection, chloroform pollution in the environment also comes from industrial discharges from pulp and paper mills, and from urban wastewater effluent. Human studies show that chloroform damages the kidneys, liver and central nervous system. In animals, chloroform causes infertility, birth defects and cancer.

Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

402

Samples

Samples exceeding legal limit (MCL)

378

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	3.36 ppb	66	66	1.70 ppb - 12.3 ppb
2015	2.12 ppb	64	64	0.980 ppb - 3.60 ppb
2016	1.74 ppb	64	64	1.000 ppb - 4.20 ppb
2017	6.43 ppb	80	62	ND - 38.5 ppb
2018	13.0 ppb	64	58	ND - 127.0 ppb
2019	6.23 ppb	64	64	0.770 ppb - 27.7 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.4 ppb

The EWG Health Guideline of 0.4 ppb for chloroform 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
2014-02-20	680-98841-10	1.70 ppb
2014-02-20	680-98841-11	2.30 ppb
2014-02-20	680-98841-12	2.00 ppb
2014-02-20	680-98841-13	1.80 ppb
2014-02-20	680-98841-14	1.80 ppb
2014-02-20	680-98841-15	2.00 ppb
2014-02-20	680-98841-16	2.00 ppb
2014-02-20	680-98841-9	2.20 ppb
2014-02-20	680-98841-10	1.70 ppb
2014-02-20	680-98841-11	2.30 ppb
2014-02-20	680-98841-12	2.00 ppb
2014-02-20	680-98841-13	1.80 ppb
2014-02-20	680-98841-14	1.80 ppb
2014-02-20	680-98841-15	2.00 ppb
2014-02-20	680-98841-16	2.00 ppb
2014-02-20	680-98841-9	2.20 ppb
2014-03-17	AD89825	12.3 ppb
2014-03-17	AD89825	12.3 ppb
2014-05-15	680-101371-11	3.80 ppb
2014-05-15	680-101371-12	5.00 ppb
2014-05-15	680-101371-13	5.30 ppb
2014-05-15	680-101371-14	6.30 ppb
2014-05-15	680-101371-15	4.90 ppb
2014-05-15	680-101371-16	4.80 ppb
2014-05-15	680-101371-17	5.40 ppb
2014-05-15	680-101371-18	4.60 ppb
2014-05-15	680-101371-11	3.80 ppb
2014-05-15	680-101371-12	5.00 ppb
2014-05-15	680-101371-13	5.30 ppb
2014-05-15	680-101371-14	6.30 ppb
2014-05-15	680-101371-15	4.90 ppb
2014-05-15	680-101371-16	4.80 ppb
2014-05-15	680-101371-17	5.40 ppb
2014-05-15	680-101371-18	4.60 ppb
2014-08-21	680-104518-1	2.90 ppb
2014-08-21	680-104518-2	3.00 ppb
2014-08-21	680-104518-3	4.40 ppb
2014-08-21	680-104518-4	3.20 ppb
2014-08-21	680-104518-5	2.90 ppb
2014-08-21	680-104518-6	3.40 ppb
2014-08-21	680-104518-7	4.10 ppb
2014-08-21	680-104518-8	2.50 ppb
2014-08-21	680-104518-1	2.90 ppb
2014-08-21	680-104518-2	3.00 ppb
2014-08-21	680-104518-3	4.40 ppb
2014-08-21	680-104518-4	3.20 ppb
2014-08-21	680-104518-5	2.90 ppb
2014-08-21	680-104518-6	3.40 ppb
2014-08-21	680-104518-7	4.10 ppb
2014-08-21	680-104518-8	2.50 ppb
2014-11-20	680-107558-1	2.00 ppb
2014-11-20	680-107558-2	1.90 ppb
2014-11-20	680-107558-3	1.90 ppb
2014-11-20	680-107558-4	2.00 ppb
2014-11-20	680-107558-5	2.30 ppb
2014-11-20	680-107558-6	2.10 ppb
2014-11-20	680-107558-7	2.20 ppb
2014-11-20	680-107558-8	2.00 ppb
2014-11-20	680-107558-1	2.00 ppb
2014-11-20	680-107558-2	1.90 ppb
2014-11-20	680-107558-3	1.90 ppb
2014-11-20	680-107558-4	2.00 ppb
2014-11-20	680-107558-5	2.30 ppb
2014-11-20	680-107558-6	2.10 ppb
2014-11-20	680-107558-7	2.20 ppb
2014-11-20	680-107558-8	2.00 ppb
2015-02-19	680-110052-10	1.90 ppb
2015-02-19	680-110052-11	1.80 ppb
2015-02-19	680-110052-12	1.90 ppb
2015-02-19	680-110052-13	1.90 ppb
2015-02-19	680-110052-6	2.10 ppb
2015-02-19	680-110052-7	1.90 ppb
2015-02-19	680-110052-8	1.90 ppb
2015-02-19	680-110052-9	1.90 ppb
2015-02-19	680-110052-10	1.90 ppb
2015-02-19	680-110052-11	1.80 ppb
2015-02-19	680-110052-12	1.90 ppb
2015-02-19	680-110052-13	1.90 ppb
2015-02-19	680-110052-6	2.10 ppb
2015-02-19	680-110052-7	1.90 ppb
2015-02-19	680-110052-8	1.90 ppb
2015-02-19	680-110052-9	1.90 ppb
2015-05-21	680-112829-1	2.80 ppb
2015-05-21	680-112829-2	3.30 ppb
2015-05-21	680-112829-3	3.60 ppb
2015-05-21	680-112829-4	2.90 ppb
2015-05-21	680-112829-5	3.30 ppb
2015-05-21	680-112829-6	3.00 ppb
2015-05-21	680-112829-7	3.30 ppb
2015-05-21	680-112829-8	3.20 ppb
2015-05-21	680-112829-1	2.80 ppb
2015-05-21	680-112829-2	3.30 ppb
2015-05-21	680-112829-3	3.60 ppb
2015-05-21	680-112829-4	2.90 ppb
2015-05-21	680-112829-5	3.30 ppb
2015-05-21	680-112829-6	3.00 ppb
2015-05-21	680-112829-7	3.30 ppb
2015-05-21	680-112829-8	3.20 ppb
2015-08-20	680-115908-1	1.80 ppb
2015-08-20	680-115908-2	2.10 ppb
2015-08-20	680-115908-3	1.80 ppb
2015-08-20	680-115908-4	1.90 ppb
2015-08-20	680-115908-5	2.50 ppb
2015-08-20	680-115908-6	2.50 ppb
2015-08-20	680-115908-7	2.50 ppb
2015-08-20	680-115908-8	3.20 ppb
2015-08-20	680-115908-1	1.80 ppb
2015-08-20	680-115908-2	2.10 ppb
2015-08-20	680-115908-3	1.80 ppb
2015-08-20	680-115908-4	1.90 ppb
2015-08-20	680-115908-5	2.50 ppb
2015-08-20	680-115908-6	2.50 ppb
2015-08-20	680-115908-7	2.50 ppb
2015-08-20	680-115908-8	3.20 ppb
2015-11-19	680-119268-1	1.10 ppb
2015-11-19	680-119268-2	1.000 ppb
2015-11-19	680-119268-3	1.40 ppb
2015-11-19	680-119268-4	0.980 ppb
2015-11-19	680-119268-5	1.20 ppb
2015-11-19	680-119268-6	1.10 ppb
2015-11-19	680-119268-7	1.10 ppb
2015-11-19	680-119268-8	1.000 ppb
2015-11-19	680-119268-1	1.10 ppb
2015-11-19	680-119268-2	1.000 ppb
2015-11-19	680-119268-3	1.40 ppb
2015-11-19	680-119268-4	0.980 ppb
2015-11-19	680-119268-5	1.20 ppb
2015-11-19	680-119268-6	1.10 ppb
2015-11-19	680-119268-7	1.10 ppb
2015-11-19	680-119268-8	1.000 ppb
2016-02-18	680-122228-1	1.50 ppb
2016-02-18	680-122228-2	1.50 ppb
2016-02-18	680-122228-3	1.60 ppb
2016-02-18	680-122228-4	1.50 ppb
2016-02-18	680-122228-5	1.50 ppb
2016-02-18	680-122228-6	1.60 ppb
2016-02-18	680-122228-7	1.60 ppb
2016-02-18	680-122228-8	1.50 ppb
2016-02-18	680-122228-1	1.50 ppb
2016-02-18	680-122228-2	1.50 ppb
2016-02-18	680-122228-3	1.60 ppb
2016-02-18	680-122228-4	1.50 ppb
2016-02-18	680-122228-5	1.50 ppb
2016-02-18	680-122228-6	1.60 ppb
2016-02-18	680-122228-7	1.60 ppb
2016-02-18	680-122228-8	1.50 ppb
2016-05-19	680-125519-1	1.50 ppb
2016-05-19	680-125519-2	2.00 ppb
2016-05-19	680-125519-3	2.40 ppb
2016-05-19	680-125519-4	4.20 ppb
2016-05-19	680-125519-5	1.80 ppb
2016-05-19	680-125519-6	1.90 ppb
2016-05-19	680-125519-7	2.00 ppb
2016-05-19	680-125519-8	2.80 ppb
2016-05-19	680-125519-1	1.50 ppb
2016-05-19	680-125519-2	2.00 ppb
2016-05-19	680-125519-3	2.40 ppb
2016-05-19	680-125519-4	4.20 ppb
2016-05-19	680-125519-5	1.80 ppb
2016-05-19	680-125519-6	1.90 ppb
2016-05-19	680-125519-7	2.00 ppb
2016-05-19	680-125519-8	2.80 ppb
2016-08-18	680-128924-1	1.90 ppb
2016-08-18	680-128924-2	1.60 ppb
2016-08-18	680-128924-3	1.30 ppb
2016-08-18	680-128924-4	2.00 ppb
2016-08-18	680-128924-5	1.70 ppb
2016-08-18	680-128924-6	2.30 ppb
2016-08-18	680-128924-7	1.80 ppb
2016-08-18	680-128924-8	1.50 ppb
2016-08-18	680-128924-1	1.90 ppb
2016-08-18	680-128924-2	1.60 ppb
2016-08-18	680-128924-3	1.30 ppb
2016-08-18	680-128924-4	2.00 ppb
2016-08-18	680-128924-5	1.70 ppb
2016-08-18	680-128924-6	2.30 ppb
2016-08-18	680-128924-7	1.80 ppb
2016-08-18	680-128924-8	1.50 ppb
2016-11-10	680-132010-10	1.60 ppb
2016-11-10	680-132010-11	1.000 ppb
2016-11-10	680-132010-12	1.40 ppb
2016-11-10	680-132010-13	1.40 ppb
2016-11-10	680-132010-14	1.40 ppb
2016-11-10	680-132010-15	1.10 ppb
2016-11-10	680-132010-16	1.10 ppb
2016-11-10	680-132010-9	1.60 ppb
2016-11-10	680-132010-10	1.60 ppb
2016-11-10	680-132010-11	1.000 ppb
2016-11-10	680-132010-12	1.40 ppb
2016-11-10	680-132010-13	1.40 ppb
2016-11-10	680-132010-14	1.40 ppb
2016-11-10	680-132010-15	1.10 ppb
2016-11-10	680-132010-16	1.10 ppb
2016-11-10	680-132010-9	1.60 ppb
2017-02-09	35294581011	2.50 ppb
2017-02-09	35294581012	2.40 ppb
2017-02-09	35294581013	2.70 ppb
2017-02-09	35294581014	2.40 ppb
2017-02-09	35294581015	2.10 ppb
2017-02-09	35294581016	2.60 ppb
2017-02-09	35294581017	2.30 ppb
2017-02-09	35294581018	2.40 ppb
2017-02-09	35294581011	2.50 ppb
2017-02-09	35294581012	2.40 ppb
2017-02-09	35294581013	2.70 ppb
2017-02-09	35294581014	2.40 ppb
2017-02-09	35294581015	2.10 ppb
2017-02-09	35294581016	2.60 ppb
2017-02-09	35294581017	2.30 ppb
2017-02-09	35294581018	2.40 ppb
2017-05-12	35312027018	ND
2017-05-12	35312027019	20.0 ppb
2017-05-12	35312027020	24.2 ppb
2017-05-12	35312027021	19.7 ppb
2017-05-12	35312027022	38.5 ppb
2017-05-12	35312027023	33.5 ppb
2017-05-12	35312027024	27.6 ppb
2017-05-12	35312027025	21.1 ppb
2017-05-12	35312027018	ND
2017-05-12	35312027019	20.0 ppb
2017-05-12	35312027020	24.2 ppb
2017-05-12	35312027021	19.7 ppb
2017-05-12	35312027022	38.5 ppb
2017-05-12	35312027023	33.5 ppb
2017-05-12	35312027024	27.6 ppb
2017-05-12	35312027025	21.1 ppb
2017-08-17	35331378001	2.40 ppb
2017-08-17	35331378002	3.30 ppb
2017-08-17	35331378003	4.10 ppb
2017-08-17	35331378004	2.60 ppb
2017-08-17	35331378005	5.00 ppb
2017-08-17	35331378006	6.00 ppb
2017-08-17	35331378007	5.90 ppb
2017-08-17	35331378008	8.00 ppb
2017-08-17	35331378001	2.40 ppb
2017-08-17	35331378002	3.30 ppb
2017-08-17	35331378003	4.10 ppb
2017-08-17	35331378004	2.60 ppb
2017-08-17	35331378005	5.00 ppb
2017-08-17	35331378006	6.00 ppb
2017-08-17	35331378007	5.90 ppb
2017-08-17	35331378008	8.00 ppb
2017-09-26	35338899002	1.90 ppb
2017-09-26	35338899003	2.00 ppb
2017-09-26	35338899004	2.10 ppb
2017-09-26	35338899005	1.90 ppb
2017-09-26	35338899006	2.00 ppb
2017-09-26	35338899007	1.90 ppb
2017-09-26	35338899008	1.90 ppb
2017-09-26	35338899009	2.00 ppb
2017-09-26	35338899002	1.90 ppb
2017-09-26	35338899003	2.00 ppb
2017-09-26	35338899004	2.10 ppb
2017-09-26	35338899005	1.90 ppb
2017-09-26	35338899006	2.00 ppb
2017-09-26	35338899007	1.90 ppb
2017-09-26	35338899008	1.90 ppb
2017-09-26	35338899009	2.00 ppb
2017-11-02	35346112001	ND
2017-11-02	35346112002	ND
2017-11-02	35346112003	ND
2017-11-02	35346112004	ND
2017-11-02	35346112005	ND
2017-11-02	35346112006	ND
2017-11-02	35346112007	ND
2017-11-02	35346112008	ND
2017-11-02	35346112001	ND
2017-11-02	35346112002	ND
2017-11-02	35346112003	ND
2017-11-02	35346112004	ND
2017-11-02	35346112005	ND
2017-11-02	35346112006	ND
2017-11-02	35346112007	ND
2017-11-02	35346112008	ND
2018-02-12	35373898001	1.60 ppb
2018-02-12	35373898002	ND
2018-02-12	35373898003	2.30 ppb
2018-02-12	35373898004	1.70 ppb
2018-02-12	35373898005	1.80 ppb
2018-02-12	35373898006	1.30 ppb
2018-02-12	35373898007	1.40 ppb
2018-02-12	35373898008	2.10 ppb
2018-02-12	35373898001	1.60 ppb
2018-02-12	35373898002	ND
2018-02-12	35373898003	2.30 ppb
2018-02-12	35373898004	1.70 ppb
2018-02-12	35373898005	1.80 ppb
2018-02-12	35373898006	1.30 ppb
2018-02-12	35373898007	1.40 ppb
2018-02-12	35373898008	2.10 ppb
2018-05-17	35393259001	127.0 ppb
2018-05-17	35393259002	3.80 ppb
2018-05-17	35393259003	103.0 ppb
2018-05-17	35393259004	3.70 ppb
2018-05-17	35393259005	4.30 ppb
2018-05-17	35393259006	4.10 ppb
2018-05-17	35393259007	4.40 ppb
2018-05-17	35393259008	3.50 ppb
2018-05-17	35393259001	127.0 ppb
2018-05-17	35393259002	3.80 ppb
2018-05-17	35393259003	103.0 ppb
2018-05-17	35393259004	3.70 ppb
2018-05-17	35393259005	4.30 ppb
2018-05-17	35393259006	4.10 ppb
2018-05-17	35393259007	4.40 ppb
2018-05-17	35393259008	3.50 ppb
2018-08-16	35412053001	1.90 ppb
2018-08-16	35412053002	2.00 ppb
2018-08-16	35412053003	2.20 ppb
2018-08-16	35412053004	ND
2018-08-16	35412053005	2.70 ppb
2018-08-16	35412053006	2.40 ppb
2018-08-16	35412053007	2.30 ppb
2018-08-16	35412053008	ND
2018-08-16	35412053001	1.90 ppb
2018-08-16	35412053002	2.00 ppb
2018-08-16	35412053003	2.20 ppb
2018-08-16	35412053004	ND
2018-08-16	35412053005	2.70 ppb
2018-08-16	35412053006	2.40 ppb
2018-08-16	35412053007	2.30 ppb
2018-08-16	35412053008	ND
2018-11-01	35428177001	6.50 ppb
2018-11-01	35428177002	13.9 ppb
2018-11-01	35428177003	16.3 ppb
2018-11-01	35428177004	10.4 ppb
2018-11-01	35428177005	37.8 ppb
2018-11-01	35428177006	19.2 ppb
2018-11-01	35428177007	20.0 ppb
2018-11-01	35428177008	12.8 ppb
2018-11-01	35428177001	6.50 ppb
2018-11-01	35428177002	13.9 ppb
2018-11-01	35428177003	16.3 ppb
2018-11-01	35428177004	10.4 ppb
2018-11-01	35428177005	37.8 ppb
2018-11-01	35428177006	19.2 ppb
2018-11-01	35428177007	20.0 ppb
2018-11-01	35428177008	12.8 ppb
2019-02-21	35450242001	8.50 ppb
2019-02-21	35450242002	14.3 ppb
2019-02-21	35450242003	10.6 ppb
2019-02-21	35450242004	27.7 ppb
2019-02-21	35450242005	21.5 ppb
2019-02-21	35450242006	15.8 ppb
2019-02-21	35450242007	17.9 ppb
2019-02-21	35450242008	15.0 ppb
2019-02-21	35450242001	8.50 ppb
2019-02-21	35450242002	14.3 ppb
2019-02-21	35450242003	10.6 ppb
2019-02-21	35450242004	27.7 ppb
2019-02-21	35450242005	21.5 ppb
2019-02-21	35450242006	15.8 ppb
2019-02-21	35450242007	17.9 ppb
2019-02-21	35450242008	15.0 ppb
2019-05-10	35468309001	2.30 ppb
2019-05-10	35468309002	2.50 ppb
2019-05-10	35468309003	2.90 ppb
2019-05-10	35468309004	2.60 ppb
2019-05-10	35468309005	2.90 ppb
2019-05-10	35468309006	2.70 ppb
2019-05-10	35468309007	2.40 ppb
2019-05-10	35468309008	2.80 ppb
2019-05-10	35468309001	2.30 ppb
2019-05-10	35468309002	2.50 ppb
2019-05-10	35468309003	2.90 ppb
2019-05-10	35468309004	2.60 ppb
2019-05-10	35468309005	2.90 ppb
2019-05-10	35468309006	2.70 ppb
2019-05-10	35468309007	2.40 ppb
2019-05-10	35468309008	2.80 ppb
2019-08-02	35487184001	3.30 ppb
2019-08-02	35487184002	3.90 ppb
2019-08-02	35487184003	3.30 ppb
2019-08-02	35487184004	3.50 ppb
2019-08-02	35487184005	3.90 ppb
2019-08-02	35487184006	3.50 ppb
2019-08-02	35487184007	3.40 ppb
2019-08-02	35487184008	4.10 ppb
2019-08-02	35487184001	3.30 ppb
2019-08-02	35487184002	3.90 ppb
2019-08-02	35487184003	3.30 ppb
2019-08-02	35487184004	3.50 ppb
2019-08-02	35487184005	3.90 ppb
2019-08-02	35487184006	3.50 ppb
2019-08-02	35487184007	3.40 ppb
2019-08-02	35487184008	4.10 ppb
2019-11-05	35510527001	3.30 ppb
2019-11-05	35510527002	2.30 ppb
2019-11-05	35510527003	0.770 ppb
2019-11-05	35510527004	2.30 ppb
2019-11-05	35510527005	2.40 ppb
2019-11-05	35510527006	2.40 ppb
2019-11-05	35510527007	2.40 ppb
2019-11-05	35510527008	2.30 ppb
2019-11-05	35510527001	3.30 ppb
2019-11-05	35510527002	2.30 ppb
2019-11-05	35510527003	0.770 ppb
2019-11-05	35510527004	2.30 ppb
2019-11-05	35510527005	2.40 ppb
2019-11-05	35510527006	2.40 ppb
2019-11-05	35510527007	2.40 ppb
2019-11-05	35510527008	2.30 ppb