Menu

EWG's Tap Water Database

Donate

Dibromochloromethane

Status: No national drinking water standard exists

 

Dibromochloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Dibromochloromethane 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

47

states detected

17,579

utilities detected

192 million

people served

47

states over health guideline

17,421

utilities over health guideline

187 million

people served over health guideline

Health concerns for dibromochloromethane

Cancer

Harm to fetal growth and development

State and national drinking water standards and health guidelines

Health Guideline 0.1 ppb

The health guideline of 0.1 ppb for dibromochloromethane 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)60.0 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 dibromochloromethane in drinking water

UTILITIES REPORTING ABOVE HEALTH GUIDELINES UTILITIES WITH CONTAMINATION
State UtilitiesPeople Served UtilitiesPeople Served
California86132,947,73887934,403,916
Texas2,91424,738,9932,92124,808,663
Illinois1,05411,935,7501,05512,091,132
Ohio97510,023,69597610,024,845
Pennsylvania1,0189,737,1741,0249,804,828
Massachusetts2498,007,1712508,041,171
New York8777,199,0868937,778,412
Georgia4757,701,9024807,762,804
North Carolina5826,975,1405836,995,630
Virginia4296,031,0804316,040,404
New Jersey2465,169,2582515,183,544
Washington4844,315,7244864,474,372
Tennessee1752,851,0211793,660,856
Missouri5303,558,6935323,568,818
Wisconsin3883,533,5973883,533,597
Alabama2183,506,2872183,506,287
Oklahoma7883,429,7317903,434,532
Louisiana6553,240,0726563,243,894
South Carolina2743,043,4562753,070,156
Arkansas4512,547,3335042,845,287
Colorado3662,800,9803672,841,397
Minnesota3342,722,3693352,740,833
Maryland812,519,583832,533,283
Nevada582,493,433592,502,746
Connecticut1912,443,7891912,443,789
Kansas6322,232,8366322,232,836
Iowa4832,133,2314832,133,231
Indiana571,810,295571,810,295
New Mexico2421,669,9322431,670,278
West Virginia3361,381,3393441,448,242
Hawaii37339,196391,015,602
Delaware72895,01873897,318
District Of Columbia4664,5724664,572
Mississippi129502,939129502,939
Rhode Island23370,86224445,862
New Hampshire87433,85087433,850
Montana140416,754141416,848
North Dakota191411,853191411,853
Alaska6196,71669322,283
Wyoming103266,849103266,849
Vermont103128,161106175,421
Kentucky7108,9697108,969
Maine3236,0123236,012
Michigan335,378335,378
Idaho218,672218,672
Arizona12,90012,900
Utah11,40011,400
South Dakota27632763
MORE
LESS

Utilities with the highest amounts of dibromochloromethane, 2015

ALL UTILITIES
LARGE UTILITIES
UtilityLocationTestsAverage levelPeople served
Village of Calvin Water SystemCalvin, LA8 of 8142.7 ppb591
Pleasant Hills-crossroads Water SystemsJoyce, LA8 of 8126.8 ppb840
Concord Water SystemMarion, LA8 of 8123.8 ppb426
Village of Georgetown Water SupplyGeorgetown, LA8 of 898.5 ppb302
Commodore Cove Improvement DistrictFreeport, TX5 of 598.3 ppb495
Walnut Ridge Estates Water SystemZavalla, TX5 of 593.5 ppb178
Southwest Ouachita Waterworks Inc.*West Monroe, LA4 of 578.8 ppb8,469
Mountain Park Public Works AuthorityMountain Park, OK4 of 476.4 ppb473
Coke County Water Supply CorporationRobert Lee, TX8 of 875.2 ppb523
City of Paint RockPaint Rock, TX7 of 775.2 ppb280
Village of Surfside BeachFreeport, TX8 of 969.7 ppb3,477
Chatham Water SystemChatham, LA10 of 1068.9 ppb1,137
Indiahoma Public Works AuthorityIndiahoma, OK4 of 467.5 ppb350
Fcsa #49/ Five PointsFresno, CA3 of 367.0 ppb122
Dubach Water SystemDubach, LA8 of 866.0 ppb1,218
Point Wilhite Ws*Downsville, LA12 of 1265.0 ppb1,950
Vaquero FarmsFirebaugh, CA4 of 464.8 ppb70
Millersview-doole Water Supply Corporation*Millersview, TX9 of 1063.6 ppb3,589
Olustee Public Water SupplyOlustee, OK8 of 861.4 ppb650
Fcsa #30/el PorvenirFresno, CA3 of 361.3 ppb130
Pappas & Company (coalinga)Mendota, CA4 of 459.8 ppb25
Wards Chapel Water SystemFarmerville, LA6 of 959.5 ppb1,350
Sardis Water SystemFarmerville, LA8 of 859.3 ppb1,404
City Of Dos PalosDos Palos, CA8 of 858.3 ppb7,450
Fcsa #32/cantua CreekFresno, CA3 of 357.7 ppb250
Black Bayou Water AssociationGreenville, MS8 of 856.7 ppb2,716
Town of WestWest, MS1 of 156.3 ppb220
Turtle Cove Lot Owners AssociationFreeport, TX5 of 556.1 ppb66
BramanBraman, OK4 of 455.0 ppb244
Huron, City ofHuron, CA6 of 653.2 ppb7,306

* 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 Dibromochloromethane, but it likely has the contaminant in its water supply.

MORE
LESS
UtilityLocationTestsAverage levelPeople served
Altus*Altus, OK16 of 1650.3 ppb21,477
Lemoore Naval Air StationNas Lemoore, CA20 of 2048.0 ppb11,500
Orange County WCID 1Vidor, TX18 of 1837.7 ppb17,681
Duncan Public Utilities Authority*Duncan, OK16 of 1632.9 ppb23,000
City of LemooreLemoore, CA16 of 1731.0 ppb24,945
CoalingaCoalinga, CA33 of 3330.6 ppb19,362
Inima USA / Aquaria Water*North Dighton, MA2 of 228.6 ppb93,810
Geneva City*Geneva, NY16 of 1627.9 ppb14,284
Charlotte Water*Charlotte, NC48 of 4827.1 ppb833,579
City of Raymondville*Raymondville, TX17 of 1726.6 ppb11,288
Corpus Christi Naval Air StationCorpus Christi, TX8 of 826.0 ppb10,464
Mountain House Community Services DistrictMountain House, CA17 of 1725.5 ppb12,940
City of Belmont*Belmont, NC16 of 1624.3 ppb10,076
Gloucester County Water Treatment PlantGloucester, VA10 of 1024.3 ppb11,397
Crystal LakeCrystal Lake, IL2 of 224.3 ppb40,634
York County East WD*York, SC16 of 1623.7 ppb21,710
Sapulpa*Sapulpa, OK16 of 1623.5 ppb19,702
City of San Benito*San Benito, TX15 of 1623.4 ppb24,250
City of Port Lavaca*Port Lavaca, TX16 of 1623.2 ppb12,248
Military Highway WSC - Las Rusias WTPProgreso, TX11 of 1123.0 ppb14,292
City of Laredo*Laredo, TX37 of 3722.7 ppb244,731
Tri County Joint Municipal Authority*Fredericktown, PA16 of 1622.6 ppb10,100
City of Rock Hill*Rock Hill, SC56 of 5622.4 ppb67,549
Weirton Area Water Board*Weirton, WV16 of 1622.2 ppb22,694
Kempner WSC*Kempner, TX20 of 2021.9 ppb15,143
City of Mercedes*Mercedes, TX17 of 1721.6 ppb15,700
City of Brighton*Brighton, CO12 of 1221.3 ppb32,700
Marshall*Marshall, MO16 of 1620.9 ppb13,065
Agua SUD*Mission, TX19 of 1920.7 ppb45,498
City of Abbeville Water System*Abbeville, LA16 of 1620.3 ppb15,450

* 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 Dibromochloromethane, but it likely has the contaminant in its water supply.

MORE
LESS