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.

2017-2019:

FOUND

FOUND ABOVE HEALTH GUIDELINES

states detected

24,914

utilities detected

237 million

people served

states over health guideline

24,858

utilities over health guideline

235 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		1,207	31,894,681			1,227	32,670,650
Texas		3,102	26,600,111			3,106	26,652,134
New York		1,373	19,300,263			1,386	19,837,707
Illinois		1,386	11,953,978			1,386	11,953,978
Pennsylvania		1,345	11,140,165			1,345	11,140,165
Ohio		1,042	9,980,736			1,043	9,982,761
Georgia		836	9,076,322			840	9,080,047
North Carolina		840	8,807,855			840	8,807,855
New Jersey		471	8,776,593			476	8,777,881
Virginia		664	6,658,465			664	6,658,465
Massachusetts		313	6,270,098			314	6,304,098
Colorado		649	6,072,456			649	6,072,456
Washington		829	5,880,566			832	5,907,735
Tennessee		319	5,797,502			311	5,887,750
Alabama		320	5,008,974			311	4,945,891
Missouri		755	4,917,172			757	4,924,366
Louisiana		854	4,213,842			861	4,217,996
Minnesota		524	3,981,847			530	4,093,619
South Carolina		353	3,910,875			353	3,910,875
Wisconsin		527	3,865,545			531	3,894,522
Michigan		518	3,576,260			519	3,576,614
Oklahoma		717	3,516,905			718	3,517,105
Utah		238	2,843,523			241	2,924,823
Nevada		85	2,724,909			87	2,729,179
Maryland		177	2,711,428			177	2,711,428
Arkansas		564	2,680,348			566	2,685,269
Connecticut		231	2,663,223			231	2,663,223
Iowa		713	2,487,683			713	2,487,683
Kansas		777	2,412,187			778	2,424,244
Indiana		130	2,201,824			125	2,170,836
New Mexico		272	1,792,273			282	1,813,736
Mississippi		444	1,796,828			444	1,796,828
West Virginia		398	1,549,377			398	1,549,377
Nebraska		137	1,252,115			137	1,252,115
Delaware		127	995,260			127	995,260
New Hampshire		246	785,078			247	786,318
Arizona		90	688,450			90	688,450
North Dakota		273	678,268			273	678,268
Rhode Island		36	578,345			37	616,345
Alaska		167	609,793			167	609,793
Montana		231	580,032			230	580,007
Hawaii		46	302,593			47	520,072
Vermont		241	466,608			241	466,608
Wyoming		175	340,678			165	337,149
Idaho		18	310,870			18	310,870
Maine		85	273,336			85	273,336
Kentucky		9	203,281			7	107,630
South Dakota		4	2,306			2	746

LESS

Filtering technologies that reduce bromodichloromethane

Utilities with the highest amounts of bromodichloromethane, 2017-2019

ALL UTILITIES

LARGE UTILITIES

Utility	Location	Tests	Average level	People served
East Columbia Water System	Columbia, LA	46 of 52	83.7 ppb	2,640
Village of Calvin Water System	Calvin, LA	96 of 102	81.7 ppb	591
Walnut Ridge Estates Water System	Zavala, TX	28 of 29	71.9 ppb	134
Highway 84 West Water Supply	Winnfield, LA	88 of 92	64.4 ppb	499
Ryan Utilities Authority	Ryan, OK	48 of 48	63.2 ppb	800
Palo Verde County Water District	Palo Verde, CA	2 of 2	63.0 ppb	410
Fcsa #30/el Porvenir	Fresno, CA	24 of 24	57.0 ppb	130
Lakewood Water System	Lufkin, TX	27 of 27	55.7 ppb	42
Waurika Public Works Authority*	Waurika, OK	54 of 54	55.3 ppb	2,100
Fcsa #32/cantua Creek	Fresno, CA	23 of 23	55.3 ppb	250
Rra Preston Shores Water System*	Wichita Falls, TX	52 of 52	54.1 ppb	2,037
Anthony Harbor Subdivision	Lufkin, TX	27 of 27	53.7 ppb	109
Pappas & Company (mendota)	Mendota, CA	23 of 24	50.8 ppb	25
Pleasant Hills-crossroads Water Systems	Joyce, LA	102 of 106	50.4 ppb	840
Village of Georgetown Water Supply	Georgetown, LA	94 of 96	50.0 ppb	302
Powell Point Water System	Lufkin, TX	28 of 28	48.9 ppb	363
La Playa Subdivision Water System	Kirbyville, TX	18 of 18	48.8 ppb	59
Joyce Water Supply	Mandeville, LA	68 of 82	48.4 ppb	474
Elmdale, City of	Elmdale, KS	10 of 10	46.0 ppb	52
Rra Arrowhead Lake Lots	Wichita Falls, TX	53 of 53	44.2 ppb	2,061
Otoe-missouria Tribe	Red Rock, OK	35 of 36	43.9 ppb	250
Fcsa #49/ Five Points	Fresno, CA	22 of 22	42.0 ppb	122
City of Paint Rock	Paint Rock, TX	27 of 28	41.9 ppb	273
City of Megargel	Megargel, TX	31 of 31	41.6 ppb	205
Buena Vista Ws Burnet	Burnet, TX	30 of 30	41.0 ppb	375
Deering Utility System	Deering, AK	15 of 15	40.7 ppb	160
Robinson Chapel Water System	West Monroe, LA	52 of 52	40.5 ppb	180
Duncan Public Utilities Authority*	Duncan, OK	97 of 98	40.0 ppb	23,000
Chatham Water System	Chatham, LA	88 of 100	40.0 ppb	1,137
Concord Water System	Marion, LA	96 of 96	39.7 ppb	426
Red Hill Waterworks Inc.*	Georgetown, LA	96 of 96	39.3 ppb	1,872
Davenport Utility Authority	Davenport, OK	48 of 48	39.0 ppb	881
Camp Loma Mar	Oakland , CA	25 of 25	38.2 ppb	176
Town of Tullos Water System	Tullos, LA	92 of 102	38.2 ppb	792
Comanche Public Works Authority*	Comanche, OK	49 of 49	37.3 ppb	1,649
Millersview-doole Water Supply Corporation*	Millersview, TX	54 of 59	37.1 ppb	3,987
Mountain Park Public Works Authority	Mountain Park, OK	24 of 24	36.9 ppb	473
Vixen Water System West	Chatham, LA	92 of 92	35.9 ppb	288
Woodbine, City of	Woodbine, KS	20 of 20	35.5 ppb	167
Maysville	Maysville, OK	51 of 51	35.0 ppb	1,212
Huron, City of	Huron, CA	45 of 45	34.8 ppb	7,306
Southwest Ouachita Waterworks Inc.	West Monroe, LA	100 of 118	34.6 ppb	10,092
Edenton, Town of	Edenton, NC	45 of 45	34.4 ppb	5,500
Cadeville Water District	West Monroe, LA	92 of 100	34.3 ppb	4,800
Turtle Cove Lot Owners Association	Freeport, TX	29 of 29	34.2 ppb	66
Lincoln County Rural Water District #2	Chandler, OK	21 of 21	34.2 ppb	400
Eros Community Water System	West Monroe, LA	68 of 68	34.0 ppb	729
Barnard, City of	Barnard, KS	10 of 10	33.8 ppb	65
French Mutual Domestic Water Consumers Association/swa	Springer, NM	40 of 41	33.7 ppb	150
Commodore Cove Improvement District	Freeport, TX	30 of 30	33.4 ppb	495

* 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
Duncan Public Utilities Authority*	Duncan, OK	97 of 98	40.0 ppb	23,000
Southwest Ouachita Waterworks Inc.	West Monroe, LA	100 of 118	34.6 ppb	10,092
City of Port Lavaca*	Port Lavaca, TX	92 of 92	26.9 ppb	12,248
Walnut Creek SUD*	Springtown, TX	102 of 102	25.0 ppb	23,118
City of Lemoore	Lemoore, CA	90 of 113	24.7 ppb	24,945
Naval Station Washington - WNY	Washington Navy Yard, DC	1 of 1	24.1 ppb	15,690
Chickasha Municipal Authority*	Chickasha, OK	101 of 101	23.8 ppb	16,036
City of Calexico	Calexico, CA	73 of 75	22.4 ppb	38,572
OSU Water Plant	Stillwater, OK	85 of 85	22.4 ppb	13,000
Marshall*	Marshall, MO	98 of 98	22.2 ppb	13,065
Sapulpa*	Sapulpa, OK	97 of 97	22.2 ppb	19,702
City of Temple*	Temple, TX	197 of 197	22.0 ppb	85,884
Tri County Joint Municipal Authority*	Fredericktown, PA	95 of 96	21.9 ppb	10,100
City of Imperial	Imperial, CA	85 of 87	21.1 ppb	16,145
Culkin Water District	Vicksburg, MS	92 of 92	20.8 ppb	11,135
City of Laredo*	Laredo, TX	238 of 238	20.2 ppb	259,113
Orange County WCID 1	Vidor, TX	112 of 112	20.2 ppb	16,448
City of Taylor*	Taylor, TX	96 of 96	20.2 ppb	18,252
D.C. Water and Sewer Authority*	Washington, DC	4 of 4	19.7 ppb	632,323
Brookesmith Special Utility District*	Brownwood, TX	68 of 68	19.7 ppb	11,289
Wagoner County Rwd #4	Broken Arrow, OK	101 of 101	19.6 ppb	25,792
Geneva City*	Geneva, NY	92 of 92	19.5 ppb	13,914
City of Papillion	Papillion, NE	96 of 105	19.4 ppb	30,000
Streetsboro City PWS	Streetsboro, OH	92 of 92	19.3 ppb	13,185
Jefferson County W and S District - M*	Wintersville, OH	92 of 92	19.2 ppb	13,983
City of Junction City*	Junction City, KS	96 of 96	19.1 ppb	22,120
Okmulgee*	Okmulgee, OK	101 of 101	19.0 ppb	13,495
Kempner WSC*	Kempner, TX	109 of 109	18.8 ppb	19,313
City of Beeville	Beeville, TX	106 of 106	18.7 ppb	15,039
Kingsland	Kingsland, GA	100 of 100	18.7 ppb	18,697
City of Salina*	Salina, KS	93 of 93	18.7 ppb	46,716
Nellis Air Force Base	Nellis Afb, NV	82 of 82	18.6 ppb	16,857
City of Brownwood	Brownwood, TX	96 of 96	18.5 ppb	19,288
Joint Base Anacostia - Bolling	Washington, DC	1 of 1	18.3 ppb	16,559
Muskingum County Water and Sewer*	Zanesville, OH	92 of 92	18.1 ppb	10,788
Ashland City*	Ashland, OH	96 of 96	18.0 ppb	20,648
City of Henderson	Henderson, NV	293 of 293	17.9 ppb	321,781
Sioux City Water Supply*	Sioux City, IA	192 of 192	17.8 ppb	82,759
City of Horseshoe Bay*	Horseshoe Bay, TX	66 of 66	17.7 ppb	10,725
City of Brighton*	Brighton, CO	74 of 74	17.7 ppb	36,010
Holbrook Public Works Department	Holbrook, MA	80 of 80	17.6 ppb	10,791
Rogers County Rural Water District # 3 Lake Plant	Claremore, OK	53 of 53	17.6 ppb	10,470
West Travis County Regional WS*	Bee Cave, TX	102 of 102	17.5 ppb	21,600
North Las Vegas Utilities	Las Vegas, NV	290 of 290	17.5 ppb	306,570
Chowan County Water System	Edenton, NC	96 of 96	17.4 ppb	10,762
City of Kerrville*	Kerrville, TX	110 of 135	17.4 ppb	22,217
Nyack Village Water Supply	Nyack, NY	83 of 83	17.4 ppb	14,700
City of Sanford*	Sanford, NC	96 of 96	17.3 ppb	45,649
Abington/rockland Joint Water Works	Rockland, MA	99 of 99	17.3 ppb	33,887
City of El Centro	El Centro, CA	92 of 96	17.2 ppb	42,595