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EWG's Tap Water Database — 2021 UPDATE

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Bromochloromethane

Status: No national drinking water standard exists

 

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.

2013-2019:

FOUND

42

states detected

670

utilities detected

32 million

people served

Health concerns for bromochloromethane

Cancer

States reporting bromochloromethane in drinking water

UTILITIES WITH CONTAMINATION
State UtilitiesPeople Served
California10513,229,842
Texas2368,270,920
Arizona121,460,619
Pennsylvania271,259,551
New Jersey151,214,886
Oklahoma35854,244
Florida20842,553
New York39525,901
Alabama9449,291
Nevada3342,262
Nebraska6313,334
Massachusetts11311,848
North Carolina12264,192
Illinois17261,512
Kentucky5227,981
Idaho2196,237
Iowa8178,758
Mississippi8175,771
Kansas10165,895
Louisiana10131,089
Georgia8118,255
West Virginia11104,047
South Carolina699,520
Utah598,300
Colorado479,629
Virginia366,615
Ohio1059,611
Oregon146,228
Missouri339,330
Hawaii134,854
Wisconsin631,931
New Mexico218,094
Michigan117,593
District Of Columbia115,690
New Hampshire314,383
Indiana212,809
Rhode Island19,500
Washington16,798
Arkansas66,358
Connecticut15,030
Montana2723
South Dakota1581
Delaware1447
MORE
LESS

Filtering technologies that reduce bromochloromethane

carbon filter icon

Activated Carbon

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Reverse Osmosis

Utilities with the highest amounts of bromochloromethane, 2013-2019

ALL UTILITIES
LARGE UTILITIES
UtilityLocationTestsAverage levelPeople served
Mcdowell County Psd BerwindWelch, WV1 of 115.4 ppb863
HogansvilleHogansville, GA12 of 1210.7 ppb3,866
Barrow County Boc Transmission Mains*Winder, GA4 of 49.55 ppb39,000
Auburn*Auburn, GA4 of 49.55 ppb7,387
Switzerland of Ohio WaterJerusalem, OH1 of 19.48 ppb2,500
Hillside VillageLaurel, MT1 of 17.90 ppb650
Houma Water Treatment Service AreaHouma, LA2 of 65.76 ppb31,560
Roanoke (the Util. Bd. of The, City of)Roanoke, AL1 of 25.50 ppb7,371
Barrow County Water System*Winder, GA4 of 84.08 ppb14,043
The Reserve At Snows BrookAtkinson, NH1 of 63.78 ppb13
Niagara Falls Water BoardNiagara Falls, NY1 of 51.88 ppb50,193
Gypsum, Town ofGypsum, CO1 of 11.70 ppb7,764
Quimby Water SupplyQuimby, IA1 of 11.50 ppb319
Hudson CityHudson, NY2 of 121.45 ppb7,500
Julian Community Services DistrictJulian, CA1 of 31.40 ppb1,105
Triform Camphill CommunityHudson, NY1 of 41.33 ppb63
Greenville Water DistrictGreenville, RI2 of 61.23 ppb9,500
Galveston County WCID 1Dickinson, TX19 of 331.23 ppb29,280
Hartland ColonyHavre, MT1 of 21.20 ppb73
Springhouse Estates W.w. CorporationBrewster, NY1 of 61.17 ppb212
Cal American Water Company - Las Posas EstatesNewbury Park, CA23 of 471.17 ppb1,800
Thousand Oaks Water DepartmentThousand Oaks, CA23 of 471.17 ppb50,000
Oak Park Water ServiceVentura, CA23 of 471.17 ppb12,200
Calleguas Municipal Water District*Thousand Oaks, CA23 of 471.17 ppb0
Solano Verde Mutual Water CompanyCamarillo, CA23 of 471.17 ppb100
Ventura County Waterworks District No. 17 - Bell CanyonMoorpark, CA23 of 471.17 ppb2,049
California Water Service Company - WestlakeSan Jose, CA23 of 471.17 ppb19,451
Lake Sherwood Community Services DistrictMoorpark, CA23 of 471.17 ppb1,527
Modesto Irrigation District*Modesto, CA1 of 61.000 ppb16
Greenwood Water DistrictGreenwood, NY1 of 20.900 ppb260
Urban Bluffs - NorthAvoca, IA4 of 40.875 ppb1,435
Town of Tonawanda Water Department*Tonawanda, NY1 of 100.830 ppb78,423
Kenmore VillageKenmore, NY1 of 100.830 ppb15,423
Coxsackie Consolidated Water DistrictCoxsackie, NY1 of 20.750 ppb376
New Baltimore Water District #2Hannacroix, NY1 of 20.750 ppb63
Coxsackie Village*Coxsackie, NY1 of 20.750 ppb4,539
Green Mountain Water CompanyMorgan Hill, CA1 of 20.700 ppb180
Cobleskill Village*Cobleskill, NY1 of 50.680 ppb6,283
Cobleskill Water DistrictCobleskill, NY1 of 50.680 ppb500
Warnerville Water District # 1Richmondville, NY1 of 50.680 ppb1,300
Champion EstatesCanton, NY1 of 20.650 ppb82
Williams Water SupplyWilliams, IA3 of 30.633 ppb353
Atlantic City Municipal Utilities AuthorityAtlantic City, NJ2 of 270.624 ppb152,415
Deer MeadowsNewark, DE1 of 60.617 ppb447
Scott Water Utility DistrictNew Franken, WI1 of 10.610 ppb1,875
Brockton Water Commission*Brockton, MA2 of 160.594 ppb93,810
Whitman Water System*Whitman, MA2 of 160.594 ppb14,574
Mountainview Mobile Home ParkOwego, NY1 of 20.550 ppb250
Town of QuintanaQuintana, TX1 of 50.520 ppb231
Charles Town UtilitiesKearneysville, WV1 of 40.503 ppb14,488

* 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
Barrow County Boc Transmission Mains*Winder, GA4 of 49.55 ppb39,000
Houma Water Treatment Service AreaHouma, LA2 of 65.76 ppb31,560
Barrow County Water System*Winder, GA4 of 84.08 ppb14,043
Niagara Falls Water BoardNiagara Falls, NY1 of 51.88 ppb50,193
Galveston County WCID 1Dickinson, TX19 of 331.23 ppb29,280
Thousand Oaks Water DepartmentThousand Oaks, CA23 of 471.17 ppb50,000
Oak Park Water ServiceVentura, CA23 of 471.17 ppb12,200
California Water Service Company - WestlakeSan Jose, CA23 of 471.17 ppb19,451
Kenmore VillageKenmore, NY1 of 100.830 ppb15,423
Town of Tonawanda Water Department*Tonawanda, NY1 of 100.830 ppb78,423
Atlantic City Municipal Utilities AuthorityAtlantic City, NJ2 of 270.624 ppb152,415
Whitman Water System*Whitman, MA2 of 160.594 ppb14,574
Brockton Water Commission*Brockton, MA2 of 160.594 ppb93,810
Charles Town UtilitiesKearneysville, WV1 of 40.503 ppb14,488
Assumption Parish Waterworks District 1*Napoleonville, LA2 of 120.485 ppb22,862
Southbridge Water DepartmentSouthbridge, MA1 of 100.440 ppb15,287
Rochester City*Rochester, NY1 of 90.433 ppb232,267
City of Denison*Denison, TX2 of 150.291 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 ppb60,065
Attleboro Water DepartmentAttleboro, MA1 of 250.252 ppb43,593
ChathamChatham, IL2 of 40.227 ppb14,820
City of CorinthCorinth, TX3 of 40.219 ppb23,568
Lake Cities Municipal Utility AuthorityLake Dallas, TX8 of 150.202 ppb16,533
Midvale City Water SystemMidvale, UT4 of 340.191 ppb33,000
City of CarlsbadCarlsbad, CA4 of 40.190 ppb84,838
Ramona Municipal WDRamona, CA4 of 40.189 ppb40,000
City of Port Lavaca*Port Lavaca, TX2 of 40.164 ppb12,248
Wells Branch MUD 1Austin, TX4 of 40.158 ppb22,062
Dennis Water DistrictSouth Dennis, MA1 of 210.148 ppb65,000
Town of Flower Mound*Flower Mound, TX5 of 60.143 ppb64,669
City of PittsburgPittsburg, CA4 of 40.138 ppb62,500
Los Angeles County WW District 29 & 80-MalibAlhambra, CA2 of 40.135 ppb31,040
Santa Margarita Water DistrictSanta Margarita, CA1 of 60.130 ppb154,231
Naval Base Ventura County, Port HuenemePoint Mugu, CA3 of 80.124 ppb11,500
City of RowlettRowlett, TX2 of 40.110 ppb59,300
City of CorinthGlen, MS6 of 100.102 ppb16,000
Council Bluffs Water Works*Council Bluffs, IA1 of 50.1000 ppb63,795
Goforth SUDNiederwald, TX6 of 190.0999 ppb27,639
City of Ankeny*Ankeny, IA3 of 70.0974 ppb54,598
City of CrowleyCrowley, TX8 of 340.0962 ppb14,800
Marinette WaterworksMarinette, WI1 of 50.0920 ppb10,968
City of Haltom CityHaltom City, TX2 of 40.0920 ppb44,134
City of Kingsville*Kingsville, TX4 of 510.0906 ppb29,947
US Army Aviation and Missile CommandRedstone Arsenal, AL2 of 210.0864 ppb38,700
Padre Dam Municipal Water District*Santee, CA3 of 40.0850 ppb96,589
California American Water Company - CoronadoImperial Beach, CA6 of 80.0838 ppb96,000
City of Galveston*Galveston, TX2 of 40.0830 ppb50,180
City of PharrPharr, TX1 of 100.0826 ppb77,320
Lee County Utilities*Fort Myers, FL4 of 130.0800 ppb251,502

* 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.