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.

2015-2017:

FOUND

FOUND ABOVE HEALTH GUIDELINES

states detected

24,258

utilities detected

227 million

people served

states over health guideline

24,197

utilities over health guideline

224 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

EWG Health Guideline 0.06 ppb

The EWG 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

States reporting bromodichloromethane in drinking water

	UTILITIES REPORTING ABOVE HEALTH GUIDELINES			UTILITIES WITH CONTAMINATION
State	Utilities	People Served		Utilities	People Served
California		1,111	32,502,302			1,136	33,544,530
Texas		3,125	25,711,892			3,129	25,752,152
New York		1,378	18,901,460			1,390	19,716,391
Illinois		1,355	12,591,613			1,355	12,591,613
Pennsylvania		1,333	10,329,707			1,336	10,348,485
Ohio		1,062	10,003,582			1,062	10,003,582
Georgia		829	9,049,658			830	9,051,104
New Jersey		462	8,740,681			472	8,756,771
North Carolina		849	7,544,824			849	7,544,824
Tennessee		335	6,649,689			324	6,627,901
Virginia		689	6,614,564			689	6,614,564
Massachusetts		302	6,187,597			304	6,221,897
Washington		839	5,475,494			841	5,486,293
Missouri		737	4,842,063			741	4,882,890
Alabama		314	4,678,087			310	4,662,859
Louisiana		861	4,244,602			862	4,244,762
Wisconsin		554	3,913,141			558	3,917,135
Minnesota		530	3,801,888			534	3,831,900
Colorado		593	3,771,831			592	3,771,637
South Carolina		338	3,705,803			339	3,717,160
Oklahoma		753	3,483,510			753	3,483,510
Arkansas		566	3,022,435			570	3,036,169
Connecticut		229	2,660,057			230	2,660,185
Nevada		79	2,514,426			81	2,521,696
Iowa		683	2,448,670			684	2,449,895
Utah		206	2,331,751			209	2,410,351
Indiana		141	2,424,027			136	2,393,039
Kansas		771	2,150,458			771	2,150,458
Mississippi		461	1,850,511			461	1,850,511
New Mexico		275	1,685,062			284	1,701,692
West Virginia		412	1,531,272			412	1,531,272
Nebraska		133	1,282,229			133	1,282,229
Delaware		126	976,224			127	977,142
Maryland		225	936,187			225	936,187
New Hampshire		233	769,578			237	774,868
North Dakota		272	676,035			272	676,035
District Of Columbia		4	664,572			4	664,572
Rhode Island		32	612,496			32	612,496
Alaska		167	606,141			167	606,141
Montana		225	543,755			224	563,713
Hawaii		46	286,824			47	475,363
Vermont		232	460,763			232	460,232
Wyoming		180	330,944			170	327,379
Maine		108	301,351			108	301,351
Arizona		5	144,390			5	144,390
Kentucky		10	204,685			8	109,034
Idaho		12	75,851			12	75,851
Michigan		10	41,416			8	40,707
South Dakota		5	2,773			3	1,213

LESS

Filtering technologies that reduce bromodichloromethane

Utilities with the highest amounts of bromodichloromethane, 2015-2017

ALL UTILITIES

LARGE UTILITIES

Utility	Location	Tests	Average level	People served
Elmdale, City of	Elmdale, KS	1 of 1	110.0 ppb	53
Village of Calvin Water System	Calvin, LA	48 of 48	92.5 ppb	591
Walnut Ridge Estates Water System	Zavalla, TX	15 of 15	82.6 ppb	178
Southwest Ouachita Waterworks Inc.	West Monroe, LA	40 of 42	77.0 ppb	10,092
Highway 84 West Water Supply	Winnfield, LA	40 of 40	73.9 ppb	499
East Columbia Water System	Columbia, LA	14 of 16	69.0 ppb	2,640
Town of Friars Point	Friars Point, MS	1 of 1	65.4 ppb	1,200
Ryan Utilities Authority	Ryan, OK	24 of 24	61.6 ppb	800
Fcsa #30/el Porvenir	Fresno, CA	11 of 11	57.8 ppb	130
Lakewood Water System	Lufkin, TX	15 of 15	57.8 ppb	42
Anthony Harbor Subdivision	Lufkin, TX	15 of 15	57.8 ppb	109
Joyce Water Supply	Covington, LA	44 of 44	56.7 ppb	474
La Playa Subdivision Water System	Kirbyville, TX	8 of 8	55.9 ppb	59
Fcsa #32/cantua Creek	Fresno, CA	11 of 11	55.7 ppb	250
Waurika Public Works Authority*	Waurika, OK	26 of 26	54.7 ppb	2,100
Village of Georgetown Water Supply	Georgetown, LA	48 of 48	54.3 ppb	302
Rra Preston Shores Water System*	Wichita Falls, TX	27 of 27	53.6 ppb	2,112
Powell Point Water System	Lufkin, TX	15 of 15	51.2 ppb	349
Pappas & Company (coalinga)	Mendota, CA	12 of 12	51.2 ppb	25
Pappas & Company (mendota)	Mendota, CA	11 of 12	50.5 ppb	25
Millersview-doole Water Supply Corporation*	Millersview, TX	27 of 30	49.7 ppb	3,987
Pleasant Hills-crossroads Water Systems	Joyce, LA	52 of 52	48.8 ppb	840
Concord Water System	Marion, LA	48 of 48	48.6 ppb	426
Mountain Park Public Works Authority	Mountain Park, OK	12 of 12	47.5 ppb	473
Davenport Utility Authority	Davenport, OK	24 of 24	46.8 ppb	881
City of Megargel	Megargel, TX	18 of 18	46.3 ppb	205
Pleasure Point	Zavalla, TX	12 of 15	46.0 ppb	106
Duncan Public Utilities Authority*	Duncan, OK	48 of 49	45.9 ppb	23,000
Otoe-missouria Tribe	Red Rock, OK	13 of 14	45.1 ppb	250
Rra Arrowhead Lake Lots	Wichita Falls, TX	27 of 27	43.3 ppb	1,675
Buena Vista Ws Burnet	Navasota, TX	15 of 15	42.6 ppb	366
Red Hill Waterworks Inc.*	Georgetown, LA	48 of 48	42.3 ppb	1,872
Cadeville Water District	West Monroe, LA	44 of 44	41.6 ppb	4,800
City of Rio Hondo	Rio Hondo, TX	20 of 20	41.2 ppb	2,400
Lincoln County Rural Water District #2	Chandler, OK	10 of 10	40.9 ppb	400
Fcsa #49/ Five Points	Fresno, CA	11 of 11	40.5 ppb	122
City of Paint Rock	Paint Rock, TX	14 of 15	39.3 ppb	247
Camp Loma Mar	Oakland �, CA	12 of 12	38.8 ppb	176
Town of Tullos Water System	Tullos, LA	46 of 48	38.6 ppb	792
Blackwater PWS	Blackwater, MO	10 of 10	38.4 ppb	205
Commodore Cove Improvement District	Freeport, TX	15 of 15	38.3 ppb	495
Loma Mar Mutual	Loma Mar, CA	9 of 9	37.8 ppb	65
Shishmaref Water System	Shishmaref, AK	7 of 7	37.5 ppb	572
Lincoln County Rural Water District #3	Wellston, OK	24 of 24	37.5 ppb	575
Vixen Water System West	Chatham, LA	40 of 40	37.4 ppb	288
Miami PWS	Miami, MO	11 of 11	37.2 ppb	140
The Trails S/d	Chapel Hill, NC	2 of 2	37.0 ppb	246
Eros Community Water System	Eros, LA	32 of 32	36.9 ppb	729
Ridgecrest	Pflugerville, TX	21 of 21	36.5 ppb	1,617
Bayridge Subdivision Water System	Houston, TX	13 of 14	36.5 ppb	243

* 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.

Utility	Location	Tests	Average level	People served
Southwest Ouachita Waterworks Inc.	West Monroe, LA	40 of 42	77.0 ppb	10,092
Duncan Public Utilities Authority*	Duncan, OK	48 of 49	45.9 ppb	23,000
City of Port Lavaca*	Port Lavaca, TX	48 of 48	28.4 ppb	12,248
City of Temple*	Temple, TX	99 of 99	26.5 ppb	69,180
Marshall*	Marshall, MO	47 of 47	25.8 ppb	13,065
Walnut Creek SUD*	Springtown, TX	51 of 51	25.4 ppb	23,807
City of Lemoore	Lemoore, CA	48 of 57	25.4 ppb	24,945
Tri County Joint Municipal Authority*	Fredericktown, PA	48 of 48	24.6 ppb	10,100
Sapulpa*	Sapulpa, OK	49 of 49	24.3 ppb	19,702
Chickasha Municipal Authority*	Chickasha, OK	49 of 49	23.0 ppb	16,036
City of Imperial	Imperial, CA	45 of 45	22.9 ppb	16,145
City of Calexico	Calexico, CA	25 of 25	22.8 ppb	38,572
City of Laredo*	Laredo, TX	111 of 111	22.3 ppb	259,113
Brookesmith Special Utility District*	Brownwood, TX	28 of 28	21.7 ppb	11,289
Altus*	Altus, OK	49 of 49	21.4 ppb	21,477
Kempner WSC*	Kempner, TX	54 of 54	21.0 ppb	17,031
Culkin Water District	Vicksburg, MS	44 of 44	20.9 ppb	11,238
City of Papillion	Papillion, NE	48 of 54	20.3 ppb	25,000
City of Taylor*	Taylor, TX	48 of 48	20.2 ppb	18,258
Jefferson County W and S District - M*	Wintersville, OH	48 of 48	20.2 ppb	13,983
Orange County WCID 1	Vidor, TX	57 of 57	20.1 ppb	17,773
City of Brownwood	Brownwood, TX	48 of 48	20.1 ppb	18,965
Geneva City*	Geneva, NY	48 of 48	19.8 ppb	13,914
City of Beeville*	Beeville, TX	54 of 54	19.6 ppb	15,039
Muskingum County Water and Sewer*	Zanesville, OH	48 of 48	19.6 ppb	10,788
City of Lampasas	Lampasas, TX	24 of 24	19.5 ppb	10,236
Wagoner County Rwd #4	Broken Arrow, OK	53 of 53	19.5 ppb	25,792
Streetsboro City PWS	Streetsboro, OH	48 of 48	19.5 ppb	13,185
Okmulgee*	Okmulgee, OK	49 of 49	19.0 ppb	13,495
City of Junction City*	Junction City, KS	48 of 48	18.9 ppb	24,665
Berkeley County PSD/Opequon	Hedgesville, WV	36 of 37	18.9 ppb	27,335
City of Eden*	Eden, NC	48 of 48	18.9 ppb	15,527
City of Weatherford*	Weatherford, TX	51 of 51	18.9 ppb	26,428
Dan River Water Inc	Eden, NC	43 of 48	18.7 ppb	11,890
Holbrook Public Works Department	Holbrook, MA	48 of 48	18.6 ppb	10,791
Nellis Air Force Base	Nellis Afb, NV	42 of 42	18.6 ppb	19,081
Ashland City*	Ashland, OH	48 of 48	18.5 ppb	20,648
Pike Water, Inc.- Plant PWS	Waverly, OH	50 of 50	18.5 ppb	18,490
Chowan County Water System	Edenton, NC	48 of 48	18.5 ppb	10,762
City of El Centro	El Centro, CA	48 of 48	18.5 ppb	42,595
OSU Water Plant	Stillwater, OK	51 of 51	18.5 ppb	13,000
USMC Lejeune--New River Air Station*	Camp Lejeune, NC	56 of 56	18.4 ppb	11,500
Kingsland	Kingsland, GA	50 of 50	18.4 ppb	18,697
West Travis County Regional WS*	Bee Cave, TX	51 of 51	18.2 ppb	21,600
City of Brighton*	Brighton, CO	42 of 42	18.2 ppb	32,700
City of Henderson	Las Vegas, NV	149 of 149	18.1 ppb	275,000
Halifax Co--Halifax*	Roanoke Rapids, NC	48 of 48	18.1 ppb	19,762
East Liverpool City	East Liverpool, OH	48 of 48	18.0 ppb	11,195
North Las Vegas Utilities	North Las Vegas, NV	146 of 146	18.0 ppb	306,570
Braintree Water and Sewer Department	Braintree, MA	15 of 15	17.8 ppb	35,744