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.
2015-2017:
48
states detected
24,258
utilities detected
227 million
people served
48
states over health guideline
24,197
utilities over health guideline
224 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 | Utilities | People Served | Utilities | People Served | |||
California | 1,111 | 32,502,302 | 1,136 | 33,544,530 | |||
Texas | 3,125 | 25,711,892 | 3,129 | 25,752,152 | |||
New York | 1,378 | 18,901,460 | 1,390 | 19,716,391 | |||
Illinois | 1,355 | 12,591,613 | 1,355 | 12,591,613 | |||
Pennsylvania | 1,333 | 10,329,707 | 1,336 | 10,348,485 | |||
Ohio | 1,062 | 10,003,582 | 1,062 | 10,003,582 | |||
Georgia | 829 | 9,049,658 | 830 | 9,051,104 | |||
New Jersey | 462 | 8,740,681 | 472 | 8,756,771 | |||
North Carolina | 849 | 7,544,824 | 849 | 7,544,824 | |||
Tennessee | 335 | 6,649,689 | 324 | 6,627,901 | |||
Virginia | 689 | 6,614,564 | 689 | 6,614,564 | |||
Massachusetts | 302 | 6,187,597 | 304 | 6,221,897 | |||
Washington | 839 | 5,475,494 | 841 | 5,486,293 | |||
Missouri | 737 | 4,842,063 | 741 | 4,882,890 | |||
Alabama | 314 | 4,678,087 | 310 | 4,662,859 | |||
Louisiana | 861 | 4,244,602 | 862 | 4,244,762 | |||
Wisconsin | 554 | 3,913,141 | 558 | 3,917,135 | |||
Minnesota | 530 | 3,801,888 | 534 | 3,831,900 | |||
Colorado | 593 | 3,771,831 | 592 | 3,771,637 | |||
South Carolina | 338 | 3,705,803 | 339 | 3,717,160 | |||
Oklahoma | 753 | 3,483,510 | 753 | 3,483,510 | |||
Arkansas | 566 | 3,022,435 | 570 | 3,036,169 | |||
Connecticut | 229 | 2,660,057 | 230 | 2,660,185 | |||
Nevada | 79 | 2,514,426 | 81 | 2,521,696 | |||
Iowa | 683 | 2,448,670 | 684 | 2,449,895 | |||
Utah | 206 | 2,331,751 | 209 | 2,410,351 | |||
Indiana | 141 | 2,424,027 | 136 | 2,393,039 | |||
Kansas | 771 | 2,150,458 | 771 | 2,150,458 | |||
Mississippi | 461 | 1,850,511 | 461 | 1,850,511 | |||
New Mexico | 275 | 1,685,062 | 284 | 1,701,692 | |||
West Virginia | 412 | 1,531,272 | 412 | 1,531,272 | |||
Nebraska | 133 | 1,282,229 | 133 | 1,282,229 | |||
Delaware | 126 | 976,224 | 127 | 977,142 | |||
Maryland | 225 | 936,187 | 225 | 936,187 | |||
New Hampshire | 233 | 769,578 | 237 | 774,868 | |||
North Dakota | 272 | 676,035 | 272 | 676,035 | |||
District Of Columbia | 4 | 664,572 | 4 | 664,572 | |||
Rhode Island | 32 | 612,496 | 32 | 612,496 | |||
Alaska | 167 | 606,141 | 167 | 606,141 | |||
Montana | 225 | 543,755 | 224 | 563,713 | |||
Hawaii | 46 | 286,824 | 47 | 475,363 | |||
Vermont | 232 | 460,763 | 232 | 460,232 | |||
Wyoming | 180 | 330,944 | 170 | 327,379 | |||
Maine | 108 | 301,351 | 108 | 301,351 | |||
Arizona | 5 | 144,390 | 5 | 144,390 | |||
Kentucky | 10 | 204,685 | 8 | 109,034 | |||
Idaho | 12 | 75,851 | 12 | 75,851 | |||
Michigan | 10 | 41,416 | 8 | 40,707 | |||
South Dakota | 5 | 2,773 | 3 | 1,213 |
Filtering technologies that reduce bromodichloromethane

Activated Carbon

Reverse Osmosis
Utilities with the highest amounts of bromodichloromethane, 2015-2017
Utility | Location | Tests | Average level | People served |
---|---|---|---|---|
Elmdale, City of | Elmdale, KS | 1 of 1 | 110.0 ppb | 53 |
Village of Calvin Water System | Calvin, LA | 48 of 48 | 92.5 ppb | 591 |
Walnut Ridge Estates Water System | Zavalla, TX | 15 of 15 | 82.6 ppb | 178 |
Southwest Ouachita Waterworks Inc. | West Monroe, LA | 40 of 42 | 77.0 ppb | 10,092 |
Highway 84 West Water Supply | Winnfield, LA | 40 of 40 | 73.9 ppb | 499 |
East Columbia Water System | Columbia, LA | 14 of 16 | 69.0 ppb | 2,640 |
Town of Friars Point | Friars Point, MS | 1 of 1 | 65.4 ppb | 1,200 |
Ryan Utilities Authority | Ryan, OK | 24 of 24 | 61.6 ppb | 800 |
Fcsa #30/el Porvenir | Fresno, CA | 11 of 11 | 57.8 ppb | 130 |
Lakewood Water System | Lufkin, TX | 15 of 15 | 57.8 ppb | 42 |
Anthony Harbor Subdivision | Lufkin, TX | 15 of 15 | 57.8 ppb | 109 |
Joyce Water Supply | Covington, LA | 44 of 44 | 56.7 ppb | 474 |
La Playa Subdivision Water System | Kirbyville, TX | 8 of 8 | 55.9 ppb | 59 |
Fcsa #32/cantua Creek | Fresno, CA | 11 of 11 | 55.7 ppb | 250 |
Waurika Public Works Authority* | Waurika, OK | 26 of 26 | 54.7 ppb | 2,100 |
Village of Georgetown Water Supply | Georgetown, LA | 48 of 48 | 54.3 ppb | 302 |
Rra Preston Shores Water System* | Wichita Falls, TX | 27 of 27 | 53.6 ppb | 2,112 |
Powell Point Water System | Lufkin, TX | 15 of 15 | 51.2 ppb | 349 |
Pappas & Company (coalinga) | Mendota, CA | 12 of 12 | 51.2 ppb | 25 |
Pappas & Company (mendota) | Mendota, CA | 11 of 12 | 50.5 ppb | 25 |
Millersview-doole Water Supply Corporation* | Millersview, TX | 27 of 30 | 49.7 ppb | 3,987 |
Pleasant Hills-crossroads Water Systems | Joyce, LA | 52 of 52 | 48.8 ppb | 840 |
Concord Water System | Marion, LA | 48 of 48 | 48.6 ppb | 426 |
Mountain Park Public Works Authority | Mountain Park, OK | 12 of 12 | 47.5 ppb | 473 |
Davenport Utility Authority | Davenport, OK | 24 of 24 | 46.8 ppb | 881 |
City of Megargel | Megargel, TX | 18 of 18 | 46.3 ppb | 205 |
Pleasure Point | Zavalla, TX | 12 of 15 | 46.0 ppb | 106 |
Duncan Public Utilities Authority* | Duncan, OK | 48 of 49 | 45.9 ppb | 23,000 |
Otoe-missouria Tribe | Red Rock, OK | 13 of 14 | 45.1 ppb | 250 |
Rra Arrowhead Lake Lots | Wichita Falls, TX | 27 of 27 | 43.3 ppb | 1,675 |
Buena Vista Ws Burnet | Navasota, TX | 15 of 15 | 42.6 ppb | 366 |
Red Hill Waterworks Inc.* | Georgetown, LA | 48 of 48 | 42.3 ppb | 1,872 |
Cadeville Water District | West Monroe, LA | 44 of 44 | 41.6 ppb | 4,800 |
City of Rio Hondo | Rio Hondo, TX | 20 of 20 | 41.2 ppb | 2,400 |
Lincoln County Rural Water District #2 | Chandler, OK | 10 of 10 | 40.9 ppb | 400 |
Fcsa #49/ Five Points | Fresno, CA | 11 of 11 | 40.5 ppb | 122 |
City of Paint Rock | Paint Rock, TX | 14 of 15 | 39.3 ppb | 247 |
Camp Loma Mar | Oakland , CA | 12 of 12 | 38.8 ppb | 176 |
Town of Tullos Water System | Tullos, LA | 46 of 48 | 38.6 ppb | 792 |
Blackwater PWS | Blackwater, MO | 10 of 10 | 38.4 ppb | 205 |
Commodore Cove Improvement District | Freeport, TX | 15 of 15 | 38.3 ppb | 495 |
Loma Mar Mutual | Loma Mar, CA | 9 of 9 | 37.8 ppb | 65 |
Shishmaref Water System | Shishmaref, AK | 7 of 7 | 37.5 ppb | 572 |
Lincoln County Rural Water District #3 | Wellston, OK | 24 of 24 | 37.5 ppb | 575 |
Vixen Water System West | Chatham, LA | 40 of 40 | 37.4 ppb | 288 |
Miami PWS | Miami, MO | 11 of 11 | 37.2 ppb | 140 |
The Trails S/d | Chapel Hill, NC | 2 of 2 | 37.0 ppb | 246 |
Eros Community Water System | Eros, LA | 32 of 32 | 36.9 ppb | 729 |
Ridgecrest | Pflugerville, TX | 21 of 21 | 36.5 ppb | 1,617 |
Bayridge Subdivision Water System | Houston, TX | 13 of 14 | 36.5 ppb | 243 |
* 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.
Utility | Location | Tests | Average level | People served |
---|---|---|---|---|
Southwest Ouachita Waterworks Inc. | West Monroe, LA | 40 of 42 | 77.0 ppb | 10,092 |
Duncan Public Utilities Authority* | Duncan, OK | 48 of 49 | 45.9 ppb | 23,000 |
City of Port Lavaca* | Port Lavaca, TX | 48 of 48 | 28.4 ppb | 12,248 |
City of Temple* | Temple, TX | 99 of 99 | 26.5 ppb | 69,180 |
Marshall* | Marshall, MO | 47 of 47 | 25.8 ppb | 13,065 |
Walnut Creek SUD* | Springtown, TX | 51 of 51 | 25.4 ppb | 23,807 |
City of Lemoore | Lemoore, CA | 48 of 57 | 25.4 ppb | 24,945 |
Tri County Joint Municipal Authority* | Fredericktown, PA | 48 of 48 | 24.6 ppb | 10,100 |
Sapulpa* | Sapulpa, OK | 49 of 49 | 24.3 ppb | 19,702 |
Chickasha Municipal Authority* | Chickasha, OK | 49 of 49 | 23.0 ppb | 16,036 |
City of Imperial | Imperial, CA | 45 of 45 | 22.9 ppb | 16,145 |
City of Calexico | Calexico, CA | 25 of 25 | 22.8 ppb | 38,572 |
City of Laredo* | Laredo, TX | 111 of 111 | 22.3 ppb | 259,113 |
Brookesmith Special Utility District* | Brownwood, TX | 28 of 28 | 21.7 ppb | 11,289 |
Altus* | Altus, OK | 49 of 49 | 21.4 ppb | 21,477 |
Kempner WSC* | Kempner, TX | 54 of 54 | 21.0 ppb | 17,031 |
Culkin Water District | Vicksburg, MS | 44 of 44 | 20.9 ppb | 11,238 |
City of Papillion | Papillion, NE | 48 of 54 | 20.3 ppb | 25,000 |
City of Taylor* | Taylor, TX | 48 of 48 | 20.2 ppb | 18,258 |
Jefferson County W and S District - M* | Wintersville, OH | 48 of 48 | 20.2 ppb | 13,983 |
Orange County WCID 1 | Vidor, TX | 57 of 57 | 20.1 ppb | 17,773 |
City of Brownwood | Brownwood, TX | 48 of 48 | 20.1 ppb | 18,965 |
Geneva City* | Geneva, NY | 48 of 48 | 19.8 ppb | 13,914 |
City of Beeville* | Beeville, TX | 54 of 54 | 19.6 ppb | 15,039 |
Muskingum County Water and Sewer* | Zanesville, OH | 48 of 48 | 19.6 ppb | 10,788 |
City of Lampasas | Lampasas, TX | 24 of 24 | 19.5 ppb | 10,236 |
Wagoner County Rwd #4 | Broken Arrow, OK | 53 of 53 | 19.5 ppb | 25,792 |
Streetsboro City PWS | Streetsboro, OH | 48 of 48 | 19.5 ppb | 13,185 |
Okmulgee* | Okmulgee, OK | 49 of 49 | 19.0 ppb | 13,495 |
City of Junction City* | Junction City, KS | 48 of 48 | 18.9 ppb | 24,665 |
Berkeley County PSD/Opequon | Hedgesville, WV | 36 of 37 | 18.9 ppb | 27,335 |
City of Eden* | Eden, NC | 48 of 48 | 18.9 ppb | 15,527 |
City of Weatherford* | Weatherford, TX | 51 of 51 | 18.9 ppb | 26,428 |
Dan River Water Inc | Eden, NC | 43 of 48 | 18.7 ppb | 11,890 |
Holbrook Public Works Department | Holbrook, MA | 48 of 48 | 18.6 ppb | 10,791 |
Nellis Air Force Base | Nellis Afb, NV | 42 of 42 | 18.6 ppb | 19,081 |
Ashland City* | Ashland, OH | 48 of 48 | 18.5 ppb | 20,648 |
Pike Water, Inc.- Plant PWS | Waverly, OH | 50 of 50 | 18.5 ppb | 18,490 |
Chowan County Water System | Edenton, NC | 48 of 48 | 18.5 ppb | 10,762 |
City of El Centro | El Centro, CA | 48 of 48 | 18.5 ppb | 42,595 |
OSU Water Plant | Stillwater, OK | 51 of 51 | 18.5 ppb | 13,000 |
USMC Lejeune--New River Air Station* | Camp Lejeune, NC | 56 of 56 | 18.4 ppb | 11,500 |
Kingsland | Kingsland, GA | 50 of 50 | 18.4 ppb | 18,697 |
West Travis County Regional WS* | Bee Cave, TX | 51 of 51 | 18.2 ppb | 21,600 |
City of Brighton* | Brighton, CO | 42 of 42 | 18.2 ppb | 32,700 |
City of Henderson | Las Vegas, NV | 149 of 149 | 18.1 ppb | 275,000 |
Halifax Co--Halifax* | Roanoke Rapids, NC | 48 of 48 | 18.1 ppb | 19,762 |
East Liverpool City | East Liverpool, OH | 48 of 48 | 18.0 ppb | 11,195 |
North Las Vegas Utilities | North Las Vegas, NV | 146 of 146 | 18.0 ppb | 306,570 |
Braintree Water and Sewer Department | Braintree, MA | 15 of 15 | 17.8 ppb | 35,744 |
* 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.