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EWG's Tap Water Database — 2021 UPDATE

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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

48

states detected

24,914

utilities detected

237 million

people served

48

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 UtilitiesPeople Served UtilitiesPeople Served
California1,20731,894,6811,22732,670,650
Texas3,10226,600,1113,10626,652,134
New York1,37319,300,2631,38619,837,707
Illinois1,38611,953,9781,38611,953,978
Pennsylvania1,34511,140,1651,34511,140,165
Ohio1,0429,980,7361,0439,982,761
Georgia8369,076,3228409,080,047
North Carolina8408,807,8558408,807,855
New Jersey4718,776,5934768,777,881
Virginia6646,658,4656646,658,465
Massachusetts3136,270,0983146,304,098
Colorado6496,072,4566496,072,456
Washington8295,880,5668325,907,735
Tennessee3195,797,5023115,887,750
Alabama3205,008,9743114,945,891
Missouri7554,917,1727574,924,366
Louisiana8544,213,8428614,217,996
Minnesota5243,981,8475304,093,619
South Carolina3533,910,8753533,910,875
Wisconsin5273,865,5455313,894,522
Michigan5183,576,2605193,576,614
Oklahoma7173,516,9057183,517,105
Utah2382,843,5232412,924,823
Nevada852,724,909872,729,179
Maryland1772,711,4281772,711,428
Arkansas5642,680,3485662,685,269
Connecticut2312,663,2232312,663,223
Iowa7132,487,6837132,487,683
Kansas7772,412,1877782,424,244
Indiana1302,201,8241252,170,836
New Mexico2721,792,2732821,813,736
Mississippi4441,796,8284441,796,828
West Virginia3981,549,3773981,549,377
Nebraska1371,252,1151371,252,115
Delaware127995,260127995,260
New Hampshire246785,078247786,318
Arizona90688,45090688,450
North Dakota273678,268273678,268
Rhode Island36578,34537616,345
Alaska167609,793167609,793
Montana231580,032230580,007
Hawaii46302,59347520,072
Vermont241466,608241466,608
Wyoming175340,678165337,149
Idaho18310,87018310,870
Maine85273,33685273,336
Kentucky9203,2817107,630
South Dakota42,3062746
MORE
LESS

Filtering technologies that reduce bromodichloromethane

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Activated Carbon

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Reverse Osmosis

Utilities with the highest amounts of bromodichloromethane, 2017-2019

ALL UTILITIES
LARGE UTILITIES
UtilityLocationTestsAverage levelPeople served
East Columbia Water SystemColumbia, LA46 of 5283.7 ppb2,640
Village of Calvin Water SystemCalvin, LA96 of 10281.7 ppb591
Walnut Ridge Estates Water SystemZavala, TX28 of 2971.9 ppb134
Highway 84 West Water SupplyWinnfield, LA88 of 9264.4 ppb499
Ryan Utilities AuthorityRyan, OK48 of 4863.2 ppb800
Palo Verde County Water DistrictPalo Verde, CA2 of 263.0 ppb410
Fcsa #30/el PorvenirFresno, CA24 of 2457.0 ppb130
Lakewood Water SystemLufkin, TX27 of 2755.7 ppb42
Waurika Public Works Authority*Waurika, OK54 of 5455.3 ppb2,100
Fcsa #32/cantua CreekFresno, CA23 of 2355.3 ppb250
Rra Preston Shores Water System*Wichita Falls, TX52 of 5254.1 ppb2,037
Anthony Harbor SubdivisionLufkin, TX27 of 2753.7 ppb109
Pappas & Company (mendota)Mendota, CA23 of 2450.8 ppb25
Pleasant Hills-crossroads Water SystemsJoyce, LA102 of 10650.4 ppb840
Village of Georgetown Water SupplyGeorgetown, LA94 of 9650.0 ppb302
Powell Point Water SystemLufkin, TX28 of 2848.9 ppb363
La Playa Subdivision Water SystemKirbyville, TX18 of 1848.8 ppb59
Joyce Water SupplyMandeville, LA68 of 8248.4 ppb474
Elmdale, City ofElmdale, KS10 of 1046.0 ppb52
Rra Arrowhead Lake LotsWichita Falls, TX53 of 5344.2 ppb2,061
Otoe-missouria TribeRed Rock, OK35 of 3643.9 ppb250
Fcsa #49/ Five PointsFresno, CA22 of 2242.0 ppb122
City of Paint RockPaint Rock, TX27 of 2841.9 ppb273
City of MegargelMegargel, TX31 of 3141.6 ppb205
Buena Vista Ws BurnetBurnet, TX30 of 3041.0 ppb375
Deering Utility SystemDeering, AK15 of 1540.7 ppb160
Robinson Chapel Water SystemWest Monroe, LA52 of 5240.5 ppb180
Duncan Public Utilities Authority*Duncan, OK97 of 9840.0 ppb23,000
Chatham Water SystemChatham, LA88 of 10040.0 ppb1,137
Concord Water SystemMarion, LA96 of 9639.7 ppb426
Red Hill Waterworks Inc.*Georgetown, LA96 of 9639.3 ppb1,872
Davenport Utility AuthorityDavenport, OK48 of 4839.0 ppb881
Camp Loma MarOakland  , CA25 of 2538.2 ppb176
Town of Tullos Water SystemTullos, LA92 of 10238.2 ppb792
Comanche Public Works Authority*Comanche, OK49 of 4937.3 ppb1,649
Millersview-doole Water Supply Corporation*Millersview, TX54 of 5937.1 ppb3,987
Mountain Park Public Works AuthorityMountain Park, OK24 of 2436.9 ppb473
Vixen Water System WestChatham, LA92 of 9235.9 ppb288
Woodbine, City ofWoodbine, KS20 of 2035.5 ppb167
MaysvilleMaysville, OK51 of 5135.0 ppb1,212
Huron, City ofHuron, CA45 of 4534.8 ppb7,306
Southwest Ouachita Waterworks Inc.West Monroe, LA100 of 11834.6 ppb10,092
Edenton, Town ofEdenton, NC45 of 4534.4 ppb5,500
Cadeville Water DistrictWest Monroe, LA92 of 10034.3 ppb4,800
Turtle Cove Lot Owners AssociationFreeport, TX29 of 2934.2 ppb66
Lincoln County Rural Water District #2Chandler, OK21 of 2134.2 ppb400
Eros Community Water SystemWest Monroe, LA68 of 6834.0 ppb729
Barnard, City ofBarnard, KS10 of 1033.8 ppb65
French Mutual Domestic Water Consumers Association/swaSpringer, NM40 of 4133.7 ppb150
Commodore Cove Improvement DistrictFreeport, TX30 of 3033.4 ppb495

* 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.

UtilityLocationTestsAverage levelPeople served
Duncan Public Utilities Authority*Duncan, OK97 of 9840.0 ppb23,000
Southwest Ouachita Waterworks Inc.West Monroe, LA100 of 11834.6 ppb10,092
City of Port Lavaca*Port Lavaca, TX92 of 9226.9 ppb12,248
Walnut Creek SUD*Springtown, TX102 of 10225.0 ppb23,118
City of LemooreLemoore, CA90 of 11324.7 ppb24,945
Naval Station Washington - WNYWashington Navy Yard, DC1 of 124.1 ppb15,690
Chickasha Municipal Authority*Chickasha, OK101 of 10123.8 ppb16,036
City of CalexicoCalexico, CA73 of 7522.4 ppb38,572
OSU Water PlantStillwater, OK85 of 8522.4 ppb13,000
Marshall*Marshall, MO98 of 9822.2 ppb13,065
Sapulpa*Sapulpa, OK97 of 9722.2 ppb19,702
City of Temple*Temple, TX197 of 19722.0 ppb85,884
Tri County Joint Municipal Authority*Fredericktown, PA95 of 9621.9 ppb10,100
City of ImperialImperial, CA85 of 8721.1 ppb16,145
Culkin Water DistrictVicksburg, MS92 of 9220.8 ppb11,135
City of Laredo*Laredo, TX238 of 23820.2 ppb259,113
Orange County WCID 1Vidor, TX112 of 11220.2 ppb16,448
City of Taylor*Taylor, TX96 of 9620.2 ppb18,252
D.C. Water and Sewer Authority*Washington, DC4 of 419.7 ppb632,323
Brookesmith Special Utility District*Brownwood, TX68 of 6819.7 ppb11,289
Wagoner County Rwd #4Broken Arrow, OK101 of 10119.6 ppb25,792
Geneva City*Geneva, NY92 of 9219.5 ppb13,914
City of PapillionPapillion, NE96 of 10519.4 ppb30,000
Streetsboro City PWSStreetsboro, OH92 of 9219.3 ppb13,185
Jefferson County W and S District - M*Wintersville, OH92 of 9219.2 ppb13,983
City of Junction City*Junction City, KS96 of 9619.1 ppb22,120
Okmulgee*Okmulgee, OK101 of 10119.0 ppb13,495
Kempner WSC*Kempner, TX109 of 10918.8 ppb19,313
City of BeevilleBeeville, TX106 of 10618.7 ppb15,039
KingslandKingsland, GA100 of 10018.7 ppb18,697
City of Salina*Salina, KS93 of 9318.7 ppb46,716
Nellis Air Force BaseNellis Afb, NV82 of 8218.6 ppb16,857
City of BrownwoodBrownwood, TX96 of 9618.5 ppb19,288
Joint Base Anacostia - BollingWashington, DC1 of 118.3 ppb16,559
Muskingum County Water and Sewer*Zanesville, OH92 of 9218.1 ppb10,788
Ashland City*Ashland, OH96 of 9618.0 ppb20,648
City of HendersonHenderson, NV293 of 29317.9 ppb321,781
Sioux City Water Supply*Sioux City, IA192 of 19217.8 ppb82,759
City of Horseshoe Bay*Horseshoe Bay, TX66 of 6617.7 ppb10,725
City of Brighton*Brighton, CO74 of 7417.7 ppb36,010
Holbrook Public Works DepartmentHolbrook, MA80 of 8017.6 ppb10,791
Rogers County Rural Water District # 3 Lake PlantClaremore, OK53 of 5317.6 ppb10,470
West Travis County Regional WS*Bee Cave, TX102 of 10217.5 ppb21,600
North Las Vegas UtilitiesLas Vegas, NV290 of 29017.5 ppb306,570
Chowan County Water SystemEdenton, NC96 of 9617.4 ppb10,762
City of Kerrville*Kerrville, TX110 of 13517.4 ppb22,217
Nyack Village Water SupplyNyack, NY83 of 8317.4 ppb14,700
City of Sanford*Sanford, NC96 of 9617.3 ppb45,649
Abington/rockland Joint Water WorksRockland, MA99 of 9917.3 ppb33,887
City of El CentroEl Centro, CA92 of 9617.2 ppb42,595

* 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.