Bromodichloromethane

Status: No national drinking water standard exists

Bromodichloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromodichloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

2015:

FOUND

FOUND ABOVE HEALTH GUIDELINES

states detected

18,860

utilities detected

214 million

people served

states over health guideline

18,824

utilities over health guideline

212 million

people served over health guideline

Health concerns for bromodichloromethane

Cancer

Harm to reproduction and child development

Change to fetal growth and development

State and national drinking water standards and health guidelines

Health Guideline 0.06 ppb

The health guideline of 0.06 ppb for bromodichloromethane 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.

EPA Maximum Contaminant
Level Goal (MCLG)0 ppb

A non-enforceable federal health guideline. For cancer-causing chemicals, these health goals are typically set to zero.

ppb = parts per billion.

States reporting bromodichloromethane in drinking water

	UTILITIES REPORTING ABOVE HEALTH GUIDELINES			UTILITIES WITH CONTAMINATION
State	Utilities	People Served		Utilities	People Served
California		896	33,567,524			905	34,311,513
Texas		2,530	24,154,780			2,532	24,176,029
New York		955	17,645,240			968	19,233,556
Illinois		1,133	12,389,019			1,133	12,389,019
Ohio		980	10,024,348			980	10,024,348
Pennsylvania		1,043	9,906,003			1,043	9,906,003
Massachusetts		270	8,600,785			270	8,600,785
Georgia		578	7,994,456			579	8,000,532
North Carolina		675	7,464,463			675	7,464,463
Virginia		485	6,339,240			485	6,339,240
Tennessee		284	5,990,261			285	6,082,767
Washington		580	5,343,630			581	5,344,988
New Jersey		182	5,088,433			188	5,102,337
Missouri		598	4,626,011			598	4,626,011
Alabama		241	4,137,150			241	4,137,150
Louisiana		764	4,013,155			764	4,013,155
Wisconsin		434	3,755,794			435	3,756,194
Minnesota		440	3,639,313			440	3,639,313
South Carolina		308	3,515,040			308	3,515,040
Oklahoma		794	3,425,630			794	3,425,630
Colorado		449	3,423,119			449	3,423,119
Arkansas		517	2,976,631			517	2,976,631
Connecticut		198	2,640,752			198	2,640,752
Nevada		49	2,446,855			49	2,446,855
Iowa		529	2,324,885			529	2,324,885
Kansas		627	2,240,974			628	2,253,232
Indiana		101	2,058,994			101	2,058,994
Utah		125	1,931,300			125	1,931,300
New Mexico		208	1,581,008			209	1,601,889
West Virginia		388	1,500,074			388	1,500,074
Delaware		91	925,803			91	925,803
Mississippi		191	839,857			191	839,857
District Of Columbia		4	664,572			4	664,572
North Dakota		252	585,070			252	585,070
Alaska		131	577,797			131	577,797
New Hampshire		99	574,433			99	574,433
Maryland		110	549,400			110	549,400
Montana		168	537,465			168	537,465
Rhode Island		27	452,662			27	452,662
Vermont		160	429,697			160	429,697
Wyoming		120	315,619			120	315,619
Hawaii		27	231,566			27	231,566
Maine		62	163,913			62	163,913
Kentucky		8	126,501			8	126,501
Michigan		8	40,707			8	40,707
Idaho		1	15,510			1	15,510
Arizona		1	2,900			1	2,900
South Dakota		3	1,213			3	1,213

LESS

Utilities with the highest amounts of bromodichloromethane, 2015

ALL UTILITIES

LARGE UTILITIES

Utility	Location	Tests	Average level	People served
Village of Calvin Water System	Calvin, LA	16 of 16	93.3 ppb	591
Fcsa #30/el Porvenir	Fresno, CA	3 of 3	77.7 ppb	130
Walnut Ridge Estates Water System	Zavalla, TX	5 of 5	76.9 ppb	178
Fcsa #32/cantua Creek	Fresno, CA	3 of 3	74.0 ppb	250
Vaquero Farms	Firebaugh, CA	4 of 4	66.8 ppb	70
Ryan	Ryan, OK	8 of 8	66.1 ppb	894
Lakewood Water System	Lufkin, TX	5 of 5	58.4 ppb	52
Fcsa #49/ Five Points	Fresno, CA	3 of 3	58.0 ppb	122
Southwest Ouachita Waterworks Inc.*	West Monroe, LA	8 of 10	57.2 ppb	8,469
Anthony Harbor Subdivision	Lufkin, TX	5 of 5	57.0 ppb	183
Pappas & Company (coalinga)	Mendota, CA	4 of 4	56.5 ppb	25
Commodore Cove Improvement District	Freeport, TX	5 of 5	56.1 ppb	495
Village of Georgetown Water Supply	Georgetown, LA	16 of 16	56.1 ppb	302
Powell Point Water System	Lufkin, TX	5 of 5	56.0 ppb	349
Creta Water Corporation*	Hollis, OK	2 of 2	55.2 ppb	230
Milford, City of	Milford, KS	4 of 4	54.5 ppb	594
City of Megargel	Megargel, TX	8 of 8	53.6 ppb	205
Waurika Public Works Authority*	Waurika, OK	9 of 9	53.1 ppb	1,988
Village of Surfside Beach	Freeport, TX	10 of 11	52.8 ppb	3,477
Joyce Water Supply	Covington, LA	8 of 8	52.8 ppb	474
Duncan Mobile Village	Duncan, OK	4 of 4	52.3 ppb	68
City of Paint Rock	Paint Rock, TX	7 of 7	51.9 ppb	280
Duncan Public Utilities Authority*	Duncan, OK	16 of 16	51.0 ppb	23,000
Davenport Utility Authority	Davenport, OK	8 of 8	50.9 ppb	881
Concord Water System	Marion, LA	16 of 16	50.8 ppb	426
Pleasure Point	Zavalla, TX	4 of 5	50.2 ppb	168
Somervell County Water District - Wheele*	Glen Rose, TX	5 of 5	49.1 ppb	1,020
Pleasant Hills-crossroads Water Systems	Joyce, LA	16 of 16	48.8 ppb	840
Millersview-doole Water Supply Corporation*	Millersview, TX	9 of 10	47.8 ppb	3,589
Loma Mar Mutual	Loma Mar, CA	5 of 5	47.6 ppb	65

* This water utility supplies finished drinking water to at least one other water utility. The purchasing utility is not required to test for or report Bromodichloromethane, but it likely has the contaminant in its water supply.

LESS

Utility	Location	Tests	Average level	People served
Duncan Public Utilities Authority*	Duncan, OK	16 of 16	51.0 ppb	23,000
Altus*	Altus, OK	16 of 16	40.2 ppb	21,477
Tri County Joint Municipal Authority*	Fredericktown, PA	16 of 16	30.9 ppb	10,100
City of Port Lavaca*	Port Lavaca, TX	16 of 16	28.5 ppb	12,248
Marshall*	Marshall, MO	16 of 16	27.5 ppb	13,065
City of Temple*	Temple, TX	33 of 33	27.2 ppb	69,180
Chickasha Municipal Authority*	Chickasha, OK	16 of 16	26.1 ppb	16,036
Inima USA / Aquaria Water*	North Dighton, MA	1 of 1	25.6 ppb	93,810
City of Laredo*	Laredo, TX	37 of 37	24.5 ppb	244,731
Wagoner County Rwd #4	Broken Arrow, OK	20 of 20	24.2 ppb	25,792
Corpus Christi Naval Air Station	Corpus Christi, TX	8 of 8	24.2 ppb	10,464
Walnut Creek SUD*	Springtown, TX	17 of 17	22.9 ppb	18,528
City of Calexico	Calexico, CA	13 of 13	22.7 ppb	38,572
Gloucester County Water Treatment Plant	Gloucester, VA	10 of 10	22.6 ppb	11,397
Sapulpa*	Sapulpa, OK	16 of 16	22.6 ppb	19,702
City of Lemoore	Lemoore, CA	16 of 17	22.3 ppb	24,945
City of Victoria	Victoria, TX	33 of 33	22.1 ppb	67,444
Halifax Co--Halifax*	Roanoke Rapids, NC	16 of 16	21.6 ppb	19,762
Geneva City*	Geneva, NY	16 of 16	21.5 ppb	14,284
Alliance City PWS	Alliance, OH	16 of 16	21.4 ppb	22,232
City of Blythe	Blythe, CA	16 of 16	21.3 ppb	12,155
Lemoore Naval Air Station	Nas Lemoore, CA	20 of 20	21.2 ppb	11,500
Muskingum County Water - NW	Zanesville, OH	16 of 16	20.8 ppb	11,102
Orange County WCID 1	Vidor, TX	18 of 18	20.7 ppb	17,681
Streetsboro City PWS	Streetsboro, OH	16 of 16	20.7 ppb	13,185
Jefferson County W and S District - M*	Wintersville, OH	16 of 16	20.6 ppb	13,983
Butts County/Jackson/Jenkinsburg WS*	Jackson, GA	18 of 18	20.2 ppb	21,600
City of Taylor*	Taylor, TX	16 of 16	20.2 ppb	18,291
City of Ennis*	Ennis, TX	17 of 17	20.1 ppb	19,331
City of Henderson	Las Vegas, NV	48 of 48	20.0 ppb	275,000

LESS