Overview

Dibromochloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Dibromochloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.1 ppb

The EWG Health Guideline of 0.1 ppb for dibromochloromethane was based on the California Office of Environmental Health Hazard Assessment's public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer and harm to fetal growth and development.

ppb = parts per billion

National Standard Exists

Health Concerns:

Cancer
Harm to fetal growth and development

Want to remove
Dibromochloromethane from your water?

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Activated Carbon,

Reverse Osmosis,

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Dibromochloromethane around the Country

	UTILITIES REPORTING ABOVE HEALTH GUIDELINES		UTILITIES WITH CONTAMINATION
State	Utilities	People Served	Utilities	People Served
California		1,302	33,874,494		1,376	35,977,838
Texas		3,546	29,038,567		3,688	29,596,084
New York		1,322	7,254,326		1,417	18,407,401
Illinois		1,326	11,468,152		1,356	11,552,447
Pennsylvania		1,250	10,493,813		1,307	11,119,256
Ohio		1,042	10,395,017		1,066	10,407,782
Georgia		819	9,520,379		883	9,719,479
New Jersey		441	8,740,430		472	8,823,878
North Carolina		738	7,778,330		790	8,518,077
Virginia		509	6,389,267		608	7,057,771
Massachusetts		319	5,844,754		352	6,407,434
Florida		215	6,110,496		218	6,384,555
Colorado		677	5,385,270		739	6,090,852
Washington		717	4,265,433		794	5,950,932
Tennessee		200	3,990,030		276	5,411,046
Maryland		121	4,383,365		121	4,383,365
Louisiana		817	4,170,184		849	4,353,536
Missouri		678	3,730,017		741	4,090,950
Minnesota		430	3,692,614		457	3,888,394
Wisconsin		480	3,425,982		524	3,835,661
Oklahoma		713	3,548,263		726	3,556,034
South Carolina		284	3,142,006		313	3,434,599
Utah		255	3,132,436		277	3,279,127
Alabama		134	2,710,336		162	3,166,496
Nevada		88	2,976,691		101	3,008,242
Arkansas		407	1,794,648		561	2,737,715
Indiana		195	2,562,611		221	2,737,642
Connecticut		224	2,044,797		238	2,568,111
Iowa		682	2,398,430		697	2,418,612
Kansas		800	1,956,710		805	1,971,357
New Mexico		312	1,884,552		327	1,898,571
Arizona		197	1,852,480		208	1,860,930
West Virginia		285	1,295,979		346	1,487,259
Hawaii		65	390,677		77	1,320,893
Nebraska		135	1,309,416		141	1,316,185
Rhode Island		41	1,016,641		42	1,016,689
Delaware		116	822,158		125	853,261
Idaho		29	711,377		33	733,593
District Of Columbia		4	667,325		4	667,325
North Dakota		248	623,039		251	641,509
Montana		224	386,885		231	464,552
Wyoming		163	363,167		173	390,352
Vermont		159	137,453		181	245,872
Mississippi		61	159,742		61	159,742
Alaska		88	83,120		103	99,314
Maine		24	65,081		24	65,081

SHOW LESS

Utilities with the highest amounts of dibromochloromethane, 2021-2023

ALL UTILITIES

LARGE UTILITIES

Utility	Location	Tests	Average level	People served
City of Paint Rock	Paint Rock, TX	12 of 12	134.3 ppb	275
Village of Calvin Water System	Calvin, LA	25 of 25	107.5 ppb	591
Millersview-doole Water Supply Corporation*	Millersview, TX	27 of 30	106.3 ppb	3,987
Backwood Village Water System	Saline, LA	24 of 24	98.5 ppb	783
Wards Chapel Water System	Farmerville, LA	24 of 24	94.7 ppb	1,350
Litroe Water System	Marion, LA	24 of 24	90.6 ppb	369
Village of Georgetown Water Supply	Georgetown, LA	24 of 24	87.5 ppb	363
Linville-haile Water System	Marion, LA	24 of 24	85.8 ppb	1,635
Red Hill Waterworks Inc.*	Georgetown, LA	24 of 24	84.6 ppb	1,872
Jones Mcginty Water System	Jones, LA	24 of 24	82.7 ppb	696
Paxton Water Supply Corporation	Joaquin, TX	23 of 23	80.1 ppb	1,168
Walnut Ridge Estates Water System	Huntington, TX	15 of 15	70.9 ppb	84
Sardis Water System	Gilbert, LA	24 of 24	65.0 ppb	1,404
Camp Loma Mar	Loma Mar, CA	12 of 12	61.2 ppb	7
Turtle Cove Lot Owners Association	Freeport, TX	14 of 14	61.2 ppb	67
Fcsa #30/el Porvenir	Fresno, CA	11 of 11	56.9 ppb	241
South Desoto Water System	Mansfield, LA	24 of 24	54.8 ppb	936
Matagorda County Water Control and Improvement District 2	Sargent, TX	7 of 7	54.6 ppb	564
Pleasant Hills-crossroads Water Systems	Joyce, LA	26 of 26	53.8 ppb	840
Fcsa #49/ Five Points	Fresno, CA	12 of 12	53.3 ppb	440
West Sterlington Water System	Sterlington, LA	24 of 24	49.7 ppb	1,095
Mountain Park Public Works Authority	Mountain Park, OK	12 of 12	49.6 ppb	473
Sunset Bay	Spring, TX	7 of 7	49.0 ppb	108
La Playa Subdivision Water System	Des Peres, TX	11 of 15	48.3 ppb	59
Fcsa #32/cantua Creek	Fresno, CA	12 of 12	47.4 ppb	462
Wekiva Falls Resort	Sorrento, FL	4 of 4	47.2 ppb	352
City of Lemoore	Lemoore, CA	44 of 44	45.7 ppb	27,038
Salem Water System	Farmerville, LA	22 of 26	45.2 ppb	753
Maysville Regional Water	White Cottage, OH	24 of 24	44.4 ppb	6,540
Ryan Utilities Authority	Ryan, OK	24 of 24	44.2 ppb	800
Huron, City of	Huron, CA	26 of 26	44.0 ppb	7,306
Indiahoma Public Works Authority	Indiahoma, OK	12 of 12	43.0 ppb	350
Prairie Grove Water Supply Corporation	Lufkin, TX	27 of 27	42.4 ppb	592
Multi-county Water Supply Corporation	Gatesville, TX	24 of 24	42.4 ppb	4,302
Rowena Water Supply Corporation	Rowena, TX	12 of 12	42.3 ppb	714
Town of Clayton Water System	Clayton, LA	24 of 24	41.2 ppb	723
Las Deltas Mutual Water System	Firebaugh, CA	1 of 1	41.0 ppb	375
Union Springs Water System	Converse, LA	24 of 24	40.8 ppb	1,305
Callahan County Water Supply Corporation	Clyde, TX	23 of 24	40.8 ppb	3,747
Town of Quintana	Quintana, TX	14 of 15	40.4 ppb	231
Centerline Water Supply Corporation	Somerville, TX	3 of 3	40.3 ppb	120
Port Sulphur Water District	Belle Chasse, LA	30 of 30	39.4 ppb	9,222
Starbase Airstream Park 3	Brownsville, TX	4 of 4	39.0 ppb	35
Wright City Water Supply Corporation 1	Troup, TX	29 of 29	38.5 ppb	1,308
Waurika Public Works Authority*	Waurika, OK	22 of 22	38.5 ppb	2,100
Merrill Gardens Iris Canyon Ws	Monterey, CA	5 of 5	38.4 ppb	136
Sun Meadow Estates	Rifle, CO	11 of 11	37.7 ppb	50
Hico Water System	Dubach, LA	24 of 24	37.5 ppb	1,530
City of Timpson	Timpson, TX	27 of 27	37.4 ppb	1,578
Buena Vista Ws Burnet	Burnet, TX	15 of 15	37.3 ppb	375

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

Utility	Location	Tests	Average level	People served
City of Lemoore	Lemoore, CA	44 of 44	45.7 ppb	27,038
Orange County WCID 1	Vidor, TX	56 of 56	33.5 ppb	14,769
City of Port Lavaca*	Port Lavaca, TX	48 of 48	32.1 ppb	11,854
Seminole County Northwest	Sanford, FL	4 of 4	28.2 ppb	31,986
Hudson Water Supply Corporation	Lufkin, TX	52 of 52	27.8 ppb	10,890
City of Bastrop*	Bastrop, TX	33 of 33	26.3 ppb	13,209
City of Avenal	Avenal, CA	48 of 48	24.1 ppb	13,819
Duncan Public Utilities Authority*	Duncan, OK	48 of 48	23.3 ppb	23,000
Kempner WSC*	Kempner, TX	54 of 54	23.2 ppb	20,550
City of Big Spring*	Big Spring, TX	51 of 51	23.1 ppb	27,282
City of Junction City*	Junction City, KS	48 of 48	23.0 ppb	19,167
City of Galveston*	Galveston, TX	96 of 96	22.8 ppb	52,326
Buckeye Water District 50	Deville, LA	48 of 48	22.7 ppb	12,078
Geneva City*	Geneva, NY	52 of 52	22.7 ppb	13,914
Orange City Utilities	Orange City, FL	1 of 1	22.0 ppb	12,507
Altus*	Altus, OK	54 of 54	22.0 ppb	18,717
City of Abbeville Water System	Abbeville, LA	49 of 49	21.4 ppb	14,445
San Leon Municipal Utility District	San Leon, TX	48 of 48	21.2 ppb	11,622
West Monroe Water System	West Monroe, LA	48 of 48	21.2 ppb	16,005
Sarasota	Sarasota, FL	64 of 64	20.8 ppb	55,364
Ponca City Mun Water*	Ponca City, OK	53 of 53	20.7 ppb	27,155
City of Imperial	Imperial, CA	49 of 49	20.5 ppb	21,347
Water Works District #1 of Vermilion	Maurice, LA	54 of 56	20.4 ppb	23,490
City of Texas City	Texas City, TX	48 of 48	20.4 ppb	54,357
City of Round Rock*	Round Rock, TX	102 of 102	20.3 ppb	130,662
Central Coast Water Authority*	Buellton, CA	47 of 47	20.1 ppb	646,441
City of Pittsburg	Pittsburg, CA	110 of 110	20.0 ppb	62,500
Bucksport Water Company	Conway, SC	48 of 48	20.0 ppb	15,297
Morro Bay PW Department - Water Division	Morro Bay, CA	48 of 48	19.8 ppb	10,581
Brookesmith Special Utility District*	Brownwood, TX	48 of 48	19.8 ppb	12,621
City of Eagle Pass*	Eagle Pass, TX	99 of 99	19.7 ppb	54,900
Galveston County WCID 1	Dickinson, TX	54 of 54	19.7 ppb	29,832
Coalinga	Coalinga, CA	48 of 48	19.7 ppb	17,277
City of Taylor*	Taylor, TX	48 of 48	19.5 ppb	20,622
Macomb*	Macomb, IL	48 of 48	19.2 ppb	15,052
OSU Water Plant	Stillwater, OK	51 of 51	18.9 ppb	13,000
City of Brighton*	Brighton, CO	96 of 96	18.8 ppb	55,201
Crescenta Valley CWD	La Crescenta, CA	126 of 126	18.7 ppb	32,665
Mountain House Community Services District	Mountain House, CA	44 of 44	18.5 ppb	24,040
City of Victoria	Victoria, TX	98 of 99	18.3 ppb	66,932
Walnut Creek SUD*	Springtown, TX	51 of 51	18.3 ppb	30,364
City of Union*	Union, SC	48 of 48	18.2 ppb	11,757
City of Temple*	Temple, TX	98 of 98	18.2 ppb	85,261
City of Brownwood	Brownwood, TX	48 of 48	18.2 ppb	18,862
Eunice Water System (LAWCO)	Baton Rouge, LA	47 of 48	18.0 ppb	15,588
City of La Marque	La Marque, TX	48 of 48	17.9 ppb	15,154
Bi County WSC 1*	Pittsburg, TX	93 of 93	17.8 ppb	12,777
Sonterra Municipal Utility District	Austin, TX	29 of 29	17.8 ppb	13,650
Ashland City*	Ashland, OH	49 of 49	17.5 ppb	20,648
Manville WSC*	Coupland, TX	68 of 70	17.4 ppb	39,648

EWG’s Tap
Water Database

Nitrate in
Tap Water

CONTAMINANT

Dibromochloromethane

STATES DETECTED

46

serves

244 million

utilities detected

24,462

states detected

46

serves

218 million

utilities detected

22,882

Overview

State, National, and Health Guidelines for Drinking Water

National Standard Exists

Health Concerns:

Want to remove
Dibromochloromethane from your water?

Dibromochloromethane around the Country

Utilities with the highest amounts of dibromochloromethane, 2021-2023

Know the Standards

Take Action

Need help finding a filter?

We’re in this together

Protect your water

EWG’s TapWater Database

CONTAMINANT

Dibromochloromethane

STATES DETECTED

46

serves

244 million

utilities detected

24,462

states detected

46

serves

218 million

utilities detected

22,882

Overview

State, National, and Health Guidelines for Drinking Water

National Standard Exists

Health Concerns:

Want to removeDibromochloromethane from your water?

Dibromochloromethane around the Country

Utilities with the highest amounts of dibromochloromethane, 2021-2023

Know the Standards

Take Action

Need help finding a filter?

We’re in this together

Protect your water

EWG’s Tap
Water Database

Want to remove
Dibromochloromethane from your water?