EWG's Tap Water Database — 2019 UPDATE


Bromodichloroacetic acid

Status: No national drinking water standard exists


Bromodichloroacetic acid is formed when chlorine or other disinfectants are used to treat drinking water. Bromodichloroacetic acid and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy.




states detected


utilities detected

2.3 million

people served


states over health guideline


utilities over health guideline

2.3 million

people served over health guideline

Health concerns for bromodichloroacetic acid


Change to fetal growth and development

State and national drinking water standards and health guidelines

EWG Health Guideline 0.04 ppb

The EWG Health Guideline of 0.04 ppb for bromodichloroacetic acid was defined in a peer-reviewed scientific study by EWG and represents a on-in-a-million lifetime cancer risk level. This health guideline protects against cancer.

ppb = parts per billion

States reporting bromodichloroacetic acid in drinking water

State UtilitiesPeople Served UtilitiesPeople Served
New York311,100311,100

Filtering technologies that reduce bromodichloroacetic acid

carbon filter icon

Activated Carbon

reverse osmosis icon

Reverse Osmosis

Utilities with the highest amounts of bromodichloroacetic acid, 2015-2017

UtilityLocationTestsAverage levelPeople served
Waverly PWS*Waverly, MO23 of 2412.3 ppb800
Miami PWSMiami, MO11 of 1112.1 ppb140
JamesonJameson, MO5 of 511.8 ppb121
Blackwater PWSBlackwater, MO9 of 1011.7 ppb205
Big Lake Village ofCraig, MO6 of 611.3 ppb800
Nelson PWSNelson, MO11 of 1211.3 ppb189
Saline County Public Water Supply District 1Marshall, MO12 of 1210.9 ppb480
Rosendale PWSRosendale, MO11 of 1110.4 ppb140
Sweet Springs PWS*Sweet Springs, MO22 of 2310.2 ppb1,428
Saline County Public Water Supply District 3*Marshall, MO21 of 2310.2 ppb2,673
Coffey PWSCoffey, MO10 of 109.75 ppb251
Marshall*Marshall, MO41 of 469.62 ppb13,065
Adrian PWS*Adrian, MO10 of 109.49 ppb1,677
Bolckow PWS*Bolckow, MO1 of 19.24 ppb187
Unity VillageUnity Village, MO24 of 249.04 ppb1,000
Bates County Public Water Supply District 5Adrian, MO24 of 248.65 ppb2,637
Gentry County Public Water Supply District 1*Albany, MO19 of 198.55 ppb2,000
Malta Bend PWSMalta Bend, MO9 of 107.97 ppb200
Fillmore PWSFillmore, MO12 of 127.76 ppb250
Andrew County Public Water Supply District 3*Rosendale, MO24 of 247.55 ppb1,780
Louisiana PWS*Louisiana, MO23 of 247.47 ppb3,364
Rockville PWSRockville, MO10 of 107.06 ppb175
Harrison County Public Water Supply District 1Eagleville, MO19 of 207.02 ppb870
Harry S Truman Public Water Supply District 2*Montrose, MO24 of 247.01 ppb2,700
Cainsville PWSCainsville, MO3 of 36.94 ppb296
Boonville PWS*Boonville, MO23 of 246.92 ppb8,319
Linn County Cons Public Water Supply District 1Purdin, MO24 of 246.83 ppb1,620
Caldwell County Public Water Supply District 1Cowgill, MO10 of 106.53 ppb460
Daviess County Public Water Supply District 3Gallatin, MO6 of 66.33 ppb337
Archie PWSArchie, MO14 of 146.26 ppb1,170
Saline County Public Water Supply District 2*Slater, MO24 of 246.10 ppb883
Garden City PWSGarden City, MO18 of 186.02 ppb1,642
Salisbury PWSSalisbury, MO23 of 245.91 ppb1,620
Smithville PWS*Smithville, MO24 of 245.89 ppb9,233
Montrose PWSMontrose, MO9 of 105.79 ppb386
Deepwater PWSDeepwater, MO9 of 105.69 ppb433
Mosby PWSMosby, MO10 of 105.65 ppb194
Gilliam PWSGilliam, MO10 of 105.64 ppb125
Savannah PWS*Savannah, MO6 of 65.62 ppb5,046
Bungalow Trailer ParkSavanna, MO6 of 65.62 ppb50
Triple L Trailer ParkSavanna, MO6 of 65.62 ppb52
Henry County Water Company*Clinton, MO24 of 245.60 ppb9,014
Calhoun PWSCalhoun, MO12 of 125.54 ppb496
Lagrange PWSLa Grange, MO22 of 225.52 ppb1,102
Amoret PWSAmoret, MO7 of 75.50 ppb190
Slater PWS*Slater, MO23 of 245.34 ppb1,856
Laf/jo/saline County Consolidated Public Water Supply District 2*Higginsville, MO23 of 245.28 ppb6,365
Bates County Public Water Supply District 7Rockville, MO22 of 245.27 ppb512
Holt County Public Water Supply District 1Oregon, MO24 of 245.26 ppb1,020
Jamesport PWSJamesport, MO3 of 35.26 ppb930

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

UtilityLocationTestsAverage levelPeople served
Marshall*Marshall, MO41 of 469.62 ppb13,065
Excelsior Springs*Excelsior Springs, MO48 of 485.05 ppb11,084
SpringfieldSpringfield, MO79 of 804.69 ppb175,000
Poplar BluffPoplar Bluff, MO48 of 484.24 ppb17,266
NeoshoNeosho, MO48 of 483.99 ppb12,157
GladstoneGladstone, MO48 of 483.88 ppb27,000
Columbia*Columbia, MO72 of 723.41 ppb100,733
Hannibal*Hannibal, MO44 of 483.30 ppb17,916
Thomas Hill PWSD 1*Moberly, MO23 of 243.07 ppb10,315
MoberlyMoberly, MO43 of 482.96 ppb13,974
FestusFestus, MO23 of 242.85 ppb11,600
KennettKennett, MO5 of 62.44 ppb11,500
BransonBranson, MO23 of 242.41 ppb11,880
Fort Leonard WoodFt Leonard Wood, MO46 of 482.39 ppb34,000
Cape GirardeauCape Girardeau, MO10 of 102.13 ppb39,628
Sikeston*Sikeston, MO4 of 61.89 ppb16,393
Macon County PWSD 1*Macon, MO40 of 481.81 ppb11,606
Kirksville*Kirksville, MO40 of 461.68 ppb17,304
Webb CityWebb City, MO15 of 261.26 ppb10,996
West PlainsWest Plains, MO27 of 381.08 ppb12,000
WentzvilleWentzville, MO21 of 261.07 ppb31,000
O'FallonOfallon, MO3 of 60.775 ppb27,000
Liberty*Liberty, MO8 of 380.710 ppb29,000
St. Charles County PWSD 2*O Fallon, MO31 of 540.675 ppb100,587
St. Louis City*St Louis, MO13 of 180.604 ppb315,685
KirkwoodKirkwood, MO10 of 260.477 ppb28,000
Boone County Cons. PWSD1*Columbia, MO2 of 60.440 ppb21,500
Jefferson County PWSD 10Imperial, MO9 of 240.388 ppb10,000
FultonFulton, MO3 of 60.377 ppb12,128
Jefferson County PWSD 3*Arnold, MO10 of 260.374 ppb17,000
Jefferson County Cons. PWSD C 1*Barnhart, MO15 of 480.300 ppb35,000
St. PetersSt Peters, MO15 of 520.297 ppb56,971
Johnson County PWSD 2*Holden, MO1 of 30.280 ppb13,500
Maryville*Maryville, MO13 of 480.250 ppb11,972
Jefferson County PWSD1*Arnold, MO13 of 480.235 ppb20,000
Jefferson County PWSD 2*Eureka, MO6 of 280.165 ppb20,000
Boone County PWSD 9Columbia, MO1 of 60.142 ppb12,200
St. CharlesSt Charles, MO8 of 480.138 ppb67,453
RollaRolla, MO1 of 60.102 ppb19,559
Sedalia*Sedalia, MO2 of 200.0660 ppb21,400
Blue SpringsBlue Springs, MO1 of 100.0610 ppb52,530
Lees SummitLees Summit, MO3 of 470.0602 ppb97,135
Raytown Water CompanyRaytown, MO1 of 260.0273 ppb21,135
RaymoreRaymore, MO1 of 260.0242 ppb19,963
Belton*Belton, MO1 of 260.0242 ppb23,175

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