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CONTAMINANT

Bromochloromethane

FOUND

Exceeding guidelines

STATES DETECTED

43

serves

33 million

utilities detected

801

states detected

21

serves

2.5 million

utilities detected

162

Overview

Bromochloromethane is a tap water disinfection byproduct; it is also used as an intermediate in chemical manufacturing and as a fire extinguishing agent. Disinfection byproducts in drinking water increase the risk of cancer.

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.06 ppb

The EWG Health Guideline of 0.06 ppb for bromochloromethane was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer, harm to reproduction and child development, and change to fetal growth and development.

ppb = parts per billion

National Standard Exists

Health Concerns:

  • Cancer

  • Harm to reproduction and child development

  • Change to fetal growth and development

Want to remove
Bromochloromethane from your water?

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Activated Carbon, 

Reverse Osmosis, 

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Bromochloromethane around the Country

UTILITIES REPORTING ABOVE HEALTH GUIDELINES UTILITIES WITH CONTAMINATION
State Utilities People Served Utilities People Served
California251,326,97712413,639,300
Texas29276,4383019,224,938
New Jersey649,736381,543,008
Arizona00101,471,835
Pennsylvania00271,333,081
Florida1102,00020875,896
Oklahoma0034866,434
New York29271,75040542,994
Alabama520,33126393,190
Nevada002356,985
Nebraska004329,030
Illinois116,54416273,923
North Carolina0013273,498
Idaho002238,820
Maryland28234,35528234,355
Kentucky004226,496
Mississippi008175,545
Kansas13309161,458
Iowa32,7156140,560
West Virginia11110,95711110,957
Massachusetts24,6745110,412
Utah00599,770
South Carolina00699,520
Virginia622,477998,374
Ohio434,9871291,010
Colorado00383,166
Louisiana11,891775,792
Georgia00253,136
Oregon00150,003
Missouri00344,984
Hawaii00134,854
Wisconsin34,810533,855
Washington311,770524,930
Michigan00117,593
District Of Columbia00115,690
New Mexico00114,530
New Hampshire00114,000
Indiana00213,204
Rhode Island19,50019,500
Connecticut0015,030
Arkansas141243,823
Montana16501650
South Dakota15331533

Utilities with the highest amounts of bromochloromethane, 2013-2023

ALL UTILITIES
LARGE UTILITIES
Utility Location Tests Average level People served
Fort Detrick, MD1 of 113.8 ppb7,900
Hillside VillageDallas, MT1 of 17.90 ppb650
Rombout Water DistrictFishkill, NY1 of 17.60 ppb2,000
Lebec County Water DistrictLebec, CA2 of 26.88 ppb1,379
Mountain Hill Water CompanyNewark, MD2 of 26.38 ppb2,154
Town of North East*North East, MD2 of 26.38 ppb8,600
Brookmont AreaPulaski, VA1 of 14.70 ppb100
Town of FriendsvilleMountain Lake Park, MD1 of 14.06 ppb622
Ilwaco Water Department City OfIlwaco, WA1 of 33.67 ppb2,757
Newbern HeightsPulaski, VA1 of 13.10 ppb292
Pulaski County Public Service Authority*Pulaski, VA1 of 13.10 ppb9,452
Dublin, Town of540-674-4803, VA1 of 13.10 ppb6,538
Elizabeth Water DepartmentElizabeth, WV1 of 12.60 ppb2,289
Perry Point V.a. Medical CenterPerry Point, MD1 of 12.37 ppb2,000
Kelley Water SupplyKelley, IA1 of 12.20 ppb304
Wapello Municipal Water WorksWapello, IA2 of 21.95 ppb2,096
Alexandria Town Water District #1 - Otter Street*Alexandria Bay, NY1 of 21.85 ppb60
Alexandria Town Water District #2 - RedwoodAlexandria Bay, NY1 of 21.85 ppb500
Alexandria Village*Alexandria Bay, NY1 of 21.85 ppb2,460
Fox Run Condominiums Inc.Sunderland, MD1 of 11.73 ppb85
Town of OaklandOakland, MD2 of 21.57 ppb1,850
Highland Estates Distribution SystemDunkirk, MD1 of 51.41 ppb105
Lavale Sanitary CommissionLavale, MD1 of 51.41 ppb5,500
Eastern Region Allegany Distribution SystemCumberland, MD1 of 51.41 ppb5,703
City of Cumberland*, MD1 of 51.41 ppb27,039
Bel Air - Pinto Distribution SystemDunkirk, MD1 of 51.41 ppb2,614
Ridgeley, Town OfRidgeley, WV1 of 51.41 ppb737
Riverdale SubdivisionWarsaw, VA1 of 11.40 ppb95
Williams Water SupplyWilliams, IA7 of 71.37 ppb315
Whitesville Water DistrictWhitesville, NY1 of 21.35 ppb475
Keene Valley Water DistrictKeene, NY1 of 21.30 ppb660
Rocky Mount, Town ofRocky Mount, VA1 of 11.30 ppb6,000
Greenville Water DistrictGreenville, RI2 of 61.23 ppb9,500
Troy City PWS*Troy, OH1 of 41.13 ppb26,305
Miami Co-n25a ExtensionTroy, OH1 of 41.13 ppb140
Miami Co-camp Troy Public Water SystemTroy, OH1 of 41.13 ppb3,742
West Milton Village Public Water SystemWest Milton, OH1 of 41.13 ppb4,800
Town of WillardsWillards, MD1 of 10.880 ppb940
Galveston County WCID 1Dickinson, TX12 of 260.860 ppb29,832
BloomingtonMountain Lake Park, MD1 of 10.810 ppb350
PhoenixBaltimore, MD1 of 10.770 ppb31
South Deerfield Water Supply DistrictSouth Deerfield, MA1 of 60.757 ppb3,800
Blandford Water DepartmentBlandford, MA1 of 30.723 ppb874
Ventura County Waterworks District No. 17 - Bell CanyonMoorpark, CA21 of 500.698 ppb1,946
Ventura County Waterworks District No. 19 - SomisMoorpark, CA21 of 500.698 ppb1,429
Calleguas Municipal Water District*Thousand Oaks, CA21 of 500.698 ppb640,000
Camarillo Water DepartmentCamarillo, CA21 of 500.698 ppb46,848
Crestview Mutual Water CompanyCamarillo, CA21 of 500.698 ppb2,079
Solano Verde Mutual Water CompanyCamarillo, CA21 of 500.698 ppb100
Brandeis Bardin InstituteSimi Valley, CA21 of 500.698 ppb65

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

UtilityLocationTestsAverage levelPeople served
City of Cumberland*, MD1 of 51.41 ppb27,039
Troy City PWS*Troy, OH1 of 41.13 ppb26,305
Galveston County WCID 1Dickinson, TX12 of 260.860 ppb29,832
Camrosa Water DistrictCamarillo, CA21 of 500.698 ppb32,700
Golden State Water Company - SimiRancho Cordova, CA21 of 500.698 ppb44,640
Camarillo Water DepartmentCamarillo, CA21 of 500.698 ppb46,848
California Water Service Company - WestlakeSan Jose, CA21 of 500.698 ppb19,512
Thousand Oaks Water DepartmentThousand Oaks, CA21 of 500.698 ppb53,157
Ventura Waterworks District No. 8 - Simi ValleySimi Valley, CA21 of 500.698 ppb94,738
Calleguas Municipal Water District*Thousand Oaks, CA21 of 500.698 ppb640,000
Ventura CWWD No. 1 - Moorpark*Moorpark, CA21 of 500.698 ppb36,625
Oak Park Water ServiceWestlake Village, CA21 of 500.698 ppb13,898
Wall Twp Water DepartmentWall Twp, NJ1 of 150.587 ppb26,000
Spring Lake Water DepartmentSpring Lake Heights, NJ1 of 150.587 ppb11,270
City of Frederick*Frederick, MD3 of 190.579 ppb54,000
New Design - Frederick County*Frederick, MD1 of 70.471 ppb49,200
Rochester City*Rochester, NY1 of 90.433 ppb232,267
Charles Town UtilitiesCharles Town, WV1 of 50.402 ppb15,220
City of Rio Grande City*Rio Grande City, TX2 of 70.298 ppb18,912
City of Denison*Denison, TX1 of 110.273 ppb22,682
West Palm Beach Water Treatment Plant*West Palm Beach, FL4 of 40.260 ppb102,000
Morgantown Utility Board*Morgantown, WV1 of 40.255 ppb64,644
ChathamChatham, IL2 of 40.227 ppb16,544
City of CorinthCorinth, TX3 of 40.219 ppb23,213
Carlsbad Municipa Water DistrictCarlsbad, CA4 of 40.190 ppb92,865
Lake Cities Municipal Utility AuthorityLake Dallas, TX8 of 160.190 ppb16,533
Ramona Municipal WDRamona, CA4 of 40.189 ppb35,135
City of Port Lavaca*Port Lavaca, TX2 of 40.164 ppb11,854
Wells Branch MUD 1Austin, TX4 of 40.158 ppb22,062
Lexington ParkCalifornia, MD1 of 40.145 ppb43,030
Town of Flower Mound*Flower Mound, TX5 of 60.143 ppb79,929
Los Angeles County WW District 29 & 80-MalibAlhambra, CA2 of 40.135 ppb32,719
Santa Margarita Water DistrictLas Flores, CA1 of 60.130 ppb164,604
City of RowlettRowlett, TX2 of 40.110 ppb66,212
Irondale Water SystemIrondale, AL7 of 320.109 ppb10,098
Pell City Water WorksPell City, AL3 of 140.107 ppb15,402
Midvale City Water SystemEagle Mountain, UT4 of 640.102 ppb33,000
City of CorinthGlen, MS6 of 100.102 ppb15,000
City of Ankeny*Ankeny, IA3 of 70.0974 ppb68,090
City of CrowleyCrowley, TX6 of 160.0963 ppb17,330
Goforth SUDNiederwald, TX6 of 200.0949 ppb34,893
City of Haltom CityHaltom City, TX2 of 40.0920 ppb46,260
City of PittsburgPittsburg, CA4 of 60.0917 ppb62,500
WentzvilleWentzville, MO1 of 40.0900 ppb41,784
Padre Dam Municipal Water District*Santee, CA3 of 40.0850 ppb88,963
City of Grand Prairie*Grand Prairie, TX8 of 260.0842 ppb187,050
California American Water Company - CoronadoImperial Beach, CA6 of 80.0838 ppb106,000
City of Galveston*Galveston, TX2 of 40.0830 ppb52,326
City of PharrPharr, TX1 of 100.0826 ppb77,320
Gateway Services DistrictFort Myers, FL4 of 130.0800 ppb12,717

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

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