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EWG's Tap Water Database — 2019 UPDATE

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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.

2015-2017:

FOUND
FOUND ABOVE HEALTH GUIDELINES

48

states detected

23,436

utilities detected

219 million

people served

48

states over health guideline

22,929

utilities over health guideline

209 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

EWG Health Guideline 0.1 ppb

The EWG 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

States reporting dibromochloromethane in drinking water

UTILITIES REPORTING ABOVE HEALTH GUIDELINES UTILITIES WITH CONTAMINATION
State UtilitiesPeople Served UtilitiesPeople Served
California1,11331,912,8881,14733,428,186
Texas3,50026,108,9573,52826,337,722
New York1,29716,465,7791,34118,887,664
Illinois1,26712,182,9161,27612,431,028
Pennsylvania1,32710,209,2681,34810,347,736
Ohio1,0549,985,8951,0559,995,896
Georgia6948,537,2917228,863,099
New Jersey4508,680,7344688,724,198
North Carolina7567,072,5787667,132,614
Virginia6116,353,1916346,443,304
Massachusetts2835,662,9792915,750,171
Tennessee2504,647,8762475,420,745
Washington7383,541,7547684,599,337
Alabama2814,343,5172914,421,394
Louisiana8314,136,5168424,237,088
Missouri6613,775,2886713,947,701
Wisconsin5183,784,4715283,857,849
South Carolina3123,234,4753193,639,540
Oklahoma7753,486,3767833,497,493
Colorado5513,318,2695623,435,680
Arkansas4872,531,4216103,042,709
Minnesota4092,873,6604163,010,213
Connecticut2232,610,7832272,657,372
Nevada922,539,137932,543,337
Utah1932,253,8532032,355,616
Iowa6172,237,2866172,237,286
Kansas7882,174,1727892,182,046
Indiana1002,186,473982,158,373
New Mexico3241,760,2073271,761,312
West Virginia3711,431,0333841,502,108
Hawaii67411,697741,347,403
Mississippi3301,325,3703351,330,177
Nebraska1481,304,2471481,304,247
Delaware109965,313110965,742
Maryland188888,238191899,418
New Hampshire220725,093228743,419
District Of Columbia4664,5724664,572
Rhode Island33631,46033631,460
North Dakota228547,556231610,236
Montana205451,951206454,914
Alaska84110,72490345,637
Wyoming166292,790156289,225
Vermont163160,554171228,806
Arizona6172,1906172,190
Maine74153,83575155,735
Kentucky10204,6858109,034
Idaho976,382976,382
Michigan1041,416840,707
South Dakota27632763
MORE
LESS

Filtering technologies that reduce dibromochloromethane

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Activated Carbon

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Reverse Osmosis

Utilities with the highest amounts of dibromochloromethane, 2015-2017

ALL UTILITIES
LARGE UTILITIES
UtilityLocationTestsAverage levelPeople served
Village of Calvin Water SystemCalvin, LA48 of 48144.7 ppb591
Pleasant Hills-crossroads Water SystemsJoyce, LA52 of 52132.6 ppb840
Country Estates Water System SouthWest Monroe, LA4 of 4129.7 ppb600
Concord Water SystemMarion, LA48 of 48124.7 ppb426
Walnut Ridge Estates Water SystemZavalla, TX15 of 1598.2 ppb178
Highway 84 West Water SupplyWinnfield, LA40 of 4093.5 ppb499
Town of Friars PointFriars Point, MS1 of 191.5 ppb1,200
La Playa Subdivision Water SystemKirbyville, TX8 of 884.3 ppb59
Mountain Park Public Works AuthorityMountain Park, OK12 of 1283.5 ppb473
Village of Georgetown Water SupplyGeorgetown, LA48 of 4881.2 ppb302
Southwest Ouachita Waterworks Inc.West Monroe, LA40 of 4281.1 ppb10,092
Wards Chapel Water SystemFarmerville, LA44 of 5078.6 ppb1,350
Millersview-doole Water Supply Corporation*Millersview, TX27 of 3075.5 ppb3,987
Commodore Cove Improvement DistrictFreeport, TX15 of 1571.5 ppb495
Turtle Cove Lot Owners AssociationFreeport, TX15 of 1568.9 ppb66
Red Hill Waterworks Inc.*Georgetown, LA48 of 4866.9 ppb1,872
City of Paint RockPaint Rock, TX15 of 1565.1 ppb247
Litroe Water SystemMarion, LA48 of 4864.1 ppb369
Sardis Water SystemGilbert, LA48 of 4861.6 ppb1,404
Backwood Village Water SystemSaline, LA34 of 3660.9 ppb783
Dubach Water SystemDubach, LA48 of 4858.5 ppb1,218
Indiahoma Public Works AuthorityIndiahoma, OK11 of 1157.9 ppb350
Chatham Water SystemChatham, LA52 of 5256.4 ppb1,137
Darbonne Ws SouthBernice, LA30 of 3056.2 ppb3,054
Jones Mcginty Water SystemJones, LA48 of 4855.3 ppb801
Edenton, Town ofEdenton, NC24 of 2454.6 ppb5,500
Linville-haile Water SystemMarion, LA48 of 4853.3 ppb1,635
Pappas & Company (mendota)Mendota, CA11 of 1252.4 ppb25
Rowena Water Supply CorporationRowena, TX12 of 1252.0 ppb480
Point Wilhite Ws*Downsville, LA62 of 6250.7 ppb1,950
Coke County Water Supply CorporationRobert Lee, TX24 of 2450.4 ppb523
Darling Water AssociationDarling, MS1 of 150.3 ppb213
Wildwood Mobile Home Park WsWest Monroe, LA30 of 3650.0 ppb72
Holmesville Water System*Downsville, LA48 of 4849.7 ppb2,310
Olustee Public Water SupplyOlustee, OK24 of 2447.7 ppb607
Ebarb Wwks District # 1 - Aimwell AreaZwolle, LA50 of 5047.4 ppb6,186
South Lake Water AssociationMarks, MS2 of 247.2 ppb570
Comanche County Rural Water District #4*Cache, OK20 of 2047.2 ppb3,000
Clearwater DistributionDallas, TX9 of 1047.1 ppb252
Robinson Chapel Water SystemWest Monroe, LA16 of 1646.3 ppb180
Fcsa #49/ Five PointsFresno, CA11 of 1146.3 ppb122
Fcsa #30/el PorvenirFresno, CA11 of 1144.6 ppb130
Ramsey Water SystemWest Monroe, LA30 of 3644.6 ppb60
Bayridge Subdivision Water SystemHouston, TX13 of 1444.3 ppb243
Country Estates Water System NorthWest Monroe, LA36 of 3643.8 ppb597
Pappas & Company (coalinga)Mendota, CA12 of 1243.7 ppb25
Salem Water SystemFarmerville, LA38 of 4843.5 ppb753
CheyenneCheyenne, OK25 of 2543.3 ppb778
Kensington, City ofKensington, KS1 of 143.0 ppb461
City of Rio HondoRio Hondo, TX20 of 2042.7 ppb2,400

* 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.

UtilityLocationTestsAverage levelPeople served
Southwest Ouachita Waterworks Inc.West Monroe, LA40 of 4281.1 ppb10,092
City of San LuisSan Luis, AZ1 of 142.5 ppb27,800
Orange County WCID 1Vidor, TX57 of 5734.9 ppb17,773
City of LemooreLemoore, CA48 of 5733.2 ppb24,945
Altus*Altus, OK49 of 4930.5 ppb21,477
Weirton Area Water Board*Weirton, WV36 of 3627.1 ppb22,694
Military Highway WSC - Las Rusias WTPProgreso, TX49 of 4926.2 ppb14,292
Hudson Water Supply CorporationLufkin, TX24 of 2425.3 ppb10,211
Geneva City*Geneva, NY48 of 4825.1 ppb13,914
Duncan Public Utilities Authority*Duncan, OK48 of 4924.5 ppb23,000
Lemoore Naval Air StationNas Lemoore, CA57 of 6024.4 ppb11,500
El Reno*El Reno, OK55 of 5522.4 ppb16,212
City of Laredo*Laredo, TX111 of 11122.4 ppb259,113
Nueces County WCID 3*Robstown, TX51 of 5122.1 ppb14,607
City of Mercedes*Mercedes, TX54 of 5422.1 ppb15,700
CoalingaCoalinga, CA71 of 7121.9 ppb19,362
City of Port Lavaca*Port Lavaca, TX48 of 4821.8 ppb12,248
City of KearneyKearney, NE50 of 5021.7 ppb30,919
City of Eagle PassEagle Pass, TX55 of 5520.7 ppb53,082
Brownville Water SystemWest Monroe, LA36 of 3620.2 ppb10,872
Kempner WSC*Kempner, TX54 of 5420.1 ppb17,031
Streetsboro City PWSStreetsboro, OH48 of 4820.0 ppb13,185
Marshall*Marshall, MO47 of 4719.8 ppb13,065
Water Works District #1 of VermilionMaurice, LA96 of 10419.6 ppb21,300
City of LampasasLampasas, TX24 of 2419.3 ppb10,236
City of Mineral Wells*Mineral Wells, TX51 of 5119.3 ppb14,826
City of Abbeville Water SystemAbbeville, LA94 of 9619.2 ppb15,012
City of ImperialImperial, CA45 of 4519.0 ppb16,145
Sapulpa*Sapulpa, OK49 of 4918.9 ppb19,702
City of Brighton*Brighton, CO42 of 4218.5 ppb32,700
Culkin Water DistrictVicksburg, MS44 of 4418.2 ppb11,238
City of Junction City*Junction City, KS48 of 4818.2 ppb24,665
City of AvenalAvenal, CA30 of 3018.2 ppb16,236
City of Hays*Hays, KS49 of 4917.9 ppb21,044
City of Beeville*Beeville, TX54 of 5417.9 ppb15,039
Eunice Water System (LAWCO)Baton Rouge, LA96 of 9617.8 ppb15,753
City of Temple*Temple, TX99 of 9917.6 ppb69,180
TroyTroy, IL48 of 4817.6 ppb15,000
Texas A&M University Main CampusCollege Station, TX54 of 5417.6 ppb62,500
Ashland City*Ashland, OH48 of 4817.6 ppb20,648
Buckeye Water District 50Deville, LA96 of 9617.5 ppb10,287
West Monroe Water SystemWest Monroe, LA96 of 9617.5 ppb15,930
City of InglewoodInglewood, CA96 of 10817.4 ppb82,500
Centennial Water and Sanitation District*Highlands Ranch, CO8 of 917.2 ppb88,042
City of San BenitoSan Benito, TX49 of 5017.1 ppb24,250
City of Eden*Eden, NC48 of 4816.7 ppb15,527
City of Santa Barbara Water Department*Santa Barbara, CA114 of 12216.7 ppb92,371
Montecito Water DistrictSanta Barbara, CA53 of 5616.7 ppb13,500
CollinsvilleCollinsville, IL6 of 616.5 ppb29,500
Ponca City Mun Water*Ponca City, OK64 of 6416.4 ppb27,155

* 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.