Overview

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.

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.06 ppb

The EWG Health Guideline of 0.06 ppb for bromodichloromethane 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 reproduction and child development
Change to fetal growth and development

Want to remove
Bromodichloromethane from your water?

Try these filter technologies:

Activated Carbon,

Reverse Osmosis,

understand filter technology

Bromodichloromethane around the Country

	UTILITIES REPORTING ABOVE HEALTH GUIDELINES		UTILITIES WITH CONTAMINATION
State	Utilities	People Served	Utilities	People Served
California		1,334	35,188,717		1,357	35,924,337
Texas		3,243	28,812,369		3,294	29,123,665
New York		1,422	17,630,499		1,453	18,887,071
Illinois		1,452	11,807,206		1,452	11,807,206
Pennsylvania		1,336	11,206,464		1,339	11,208,354
Ohio		1,064	10,418,534		1,083	10,423,825
Georgia		867	9,706,958		884	9,775,226
North Carolina		872	9,296,682		872	9,296,682
New Jersey		467	8,819,097		474	8,822,566
Washington		843	8,065,709		873	8,208,472
Virginia		677	7,223,123		681	7,227,160
Tennessee		341	7,017,360		345	7,163,495
Massachusetts		344	6,326,225		358	6,455,784
Florida		228	6,434,565		228	6,434,565
Colorado		748	6,304,801		754	6,318,567
Missouri		759	4,761,855		793	5,075,990
Louisiana		855	4,337,318		872	4,994,825
Alabama		239	4,320,206		254	4,498,695
Maryland		155	4,418,651		155	4,418,651
Minnesota		528	4,120,545		529	4,125,463
South Carolina		339	3,864,213		339	3,864,213
Wisconsin		539	3,838,852		555	3,863,347
Oklahoma		690	3,536,469		691	3,536,564
Utah		257	3,186,219		266	3,277,611
Nevada		75	2,933,501		81	2,962,073
Indiana		242	2,744,567		242	2,744,567
Arkansas		540	2,730,149		546	2,735,912
Connecticut		238	2,678,712		241	2,681,275
Iowa		744	2,591,703		751	2,619,980
Kansas		775	1,955,017		775	1,955,017
New Mexico		276	1,793,238		287	1,822,708
Arizona		143	1,677,033		145	1,697,852
West Virginia		383	1,547,578		384	1,548,579
Nebraska		129	1,295,553		130	1,296,596
Rhode Island		43	997,575		43	997,575
Delaware		139	864,971		140	865,013
North Dakota		276	693,572		276	693,572
District Of Columbia		4	667,325		4	667,325
Idaho		34	624,604		34	624,604
Montana		235	505,842		238	576,492
Alaska		163	465,241		164	466,234
Vermont		248	460,534		250	462,686
Wyoming		187	456,164		192	461,016
Hawaii		44	262,681		44	262,681
Maine		53	259,275		53	259,275
Mississippi		58	160,599		58	160,599

SHOW LESS

Utilities with the highest amounts of bromodichloromethane, 2021-2023

ALL UTILITIES

LARGE UTILITIES

Utility	Location	Tests	Average level	People served
Fcsa #30/el Porvenir	Fresno, CA	11 of 11	73.4 ppb	241
Starr Ridge Manor	Brewster, NY	3 of 3	69.2 ppb	420
Village of Calvin Water System	Calvin, LA	24 of 25	66.9 ppb	591
Camp Loma Mar	Loma Mar, CA	12 of 12	65.6 ppb	7
Fcsa #32/cantua Creek	Fresno, CA	12 of 12	62.5 ppb	462
Walnut Ridge Estates Water System	Huntington, TX	15 of 15	62.4 ppb	84
Ryan Utilities Authority	Ryan, OK	24 of 24	59.0 ppb	800
Lakewood Water System	Huntington, TX	15 of 15	56.5 ppb	42
City of Paint Rock	Paint Rock, TX	12 of 12	55.2 ppb	275
Powell Point Water System	Huntington, TX	15 of 15	53.7 ppb	363
Anthony Harbor Subdivision	Huntington, TX	15 of 15	51.8 ppb	101
Town of Tullos Water System	Tullos, LA	24 of 24	51.5 ppb	792
Buena Vista Ws Burnet	Burnet, TX	15 of 15	51.3 ppb	375
River Bend Water Services	Matagorda, TX	15 of 15	51.0 ppb	100
Sierra Country Club	Coupeville, WA	5 of 5	50.9 ppb	355
Fcsa #49/ Five Points	Fresno, CA	12 of 12	50.8 ppb	440
Village of Georgetown Water Supply	Georgetown, LA	24 of 24	48.0 ppb	363
Red Hill Waterworks Inc.*	Georgetown, LA	24 of 24	45.5 ppb	1,872
Waurika Public Works Authority*	Waurika, OK	22 of 22	45.1 ppb	2,100
Millersview-doole Water Supply Corporation*	Millersview, TX	27 of 30	44.4 ppb	3,987
Tannehill Water System	Winnfield, LA	24 of 24	42.9 ppb	1,932
Ebarb Wwks District #1 - North Ebarb	Zwolle, LA	24 of 24	42.5 ppb	1,761
Rra Preston Shores Water System*	Wichita Falls, TX	27 of 27	42.2 ppb	2,163
La Playa Subdivision Water System	Des Peres, TX	11 of 15	41.5 ppb	59
Backwood Village Water System	Saline, LA	24 of 24	41.3 ppb	783
Town of Clayton Water System	Clayton, LA	24 of 24	40.5 ppb	723
Silverton Municipal Water System	Silverton, TX	24 of 24	39.0 ppb	597
Seminole County Rural Water District #2	Wewoka, OK	12 of 12	37.2 ppb	315
Cali Lake Rv Resort	Wilmington, CA	3 of 3	36.7 ppb	99
Mount Erie	Mount Erie, IL	2 of 2	36.1 ppb	116
Panoche Water District	Firebaugh, CA	46 of 46	35.9 ppb	146
Huron, City of	Huron, CA	26 of 26	35.9 ppb	7,306
Town of Quintana	Quintana, TX	14 of 15	35.7 ppb	231
Comanche Public Works Authority*	Comanche, OK	24 of 24	35.7 ppb	1,649
Ebarb Wwks District # 1 - N Ebarb/belmont	Zwolle, LA	24 of 24	35.1 ppb	789
Callahan County Water Supply Corporation	Clyde, TX	24 of 24	34.6 ppb	3,747
Starbase Airstream Park 3	Brownsville, TX	4 of 4	34.2 ppb	35
Rra Foard County Water System	Wichita Falls, TX	12 of 12	34.0 ppb	318
City of Timpson	Timpson, TX	27 of 27	33.9 ppb	1,578
Maysville	Maysville, OK	23 of 23	33.7 ppb	1,212
Highway 513 Water Supply	Mansfield, LA	26 of 26	33.2 ppb	120
Prairie Grove Water Supply Corporation	Lufkin, TX	27 of 27	32.9 ppb	592
Grand Harbor Water Supply Corporation	Arlington, TX	12 of 12	32.9 ppb	231
French Mutual Domestic Water Consumers Association/swa	Springer, NM	24 of 24	32.7 ppb	150
Town of Ridgecrest Water Supply	Ridgecrest, LA	24 of 24	32.6 ppb	855
Strikeaxe Airport	Bartlesville, OK	3 of 3	32.5 ppb	125
City of Lemoore	Lemoore, CA	44 of 44	32.5 ppb	27,038
IL Youth Center St. Charles	St. Charles, IL	2 of 2	31.6 ppb	375
Merrill Gardens Iris Canyon Ws	Monterey, CA	5 of 5	31.2 ppb	136
Wellton, Town of	Wellton, AZ	8 of 8	30.8 ppb	2,375

* 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 Bromodichloromethane, 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	32.5 ppb	27,038
City of Port Lavaca*	Port Lavaca, TX	48 of 48	30.1 ppb	11,854
OSU Water Plant	Stillwater, OK	51 of 51	23.8 ppb	13,000
Sapulpa*	Sapulpa, OK	48 of 48	23.5 ppb	19,702
Wagoner County Rwd #4	Broken Arrow, OK	48 of 48	23.1 ppb	25,792
Orange County WCID 1	Vidor, TX	56 of 56	22.3 ppb	14,769
Duncan Public Utilities Authority*	Duncan, OK	48 of 48	22.1 ppb	23,000
City of Sanford*	Sanford, NC	48 of 48	21.9 ppb	47,302
City of Imperial	Imperial, CA	49 of 49	21.9 ppb	21,347
City of Laredo*	Laredo, TX	159 of 159	21.3 ppb	260,046
City of Taylor*	Taylor, TX	48 of 48	21.2 ppb	20,622
Jefferson County W and S District - M*	Wintersville, OH	52 of 52	20.1 ppb	13,983
Geneva City*	Geneva, NY	52 of 52	19.8 ppb	13,914
St. Marys	St. Marys, GA	50 of 50	19.5 ppb	19,408
City of Englewood	Englewood, CO	128 of 128	19.4 ppb	57,332
City of Junction City*	Junction City, KS	48 of 48	19.2 ppb	19,167
Southern Okla Water Corp	Ardmore, OK	43 of 48	19.1 ppb	11,250
Norwalk Water Supply	Norwalk, IA	28 of 28	18.9 ppb	12,799
Marshall County Water Corp*	Madill, OK	49 of 49	18.8 ppb	17,587
Washington County RWD #3 (new,#1)	Collinsville, OK	48 of 48	18.5 ppb	25,375
City of Waxahachie*	Waxahachie, TX	54 of 54	18.5 ppb	41,085
Alpha-Talbott Utility District	Talbott, TN	4 of 4	18.3 ppb	18,368
City of Livingston	Livingston, TX	48 of 48	18.3 ppb	15,199
Macomb*	Macomb, IL	48 of 48	18.3 ppb	15,052
Perth Amboy Water Department	Perth Amboy, NJ	56 of 56	18.3 ppb	52,328
Kempner WSC*	Kempner, TX	54 of 54	18.2 ppb	20,550
Sonterra Municipal Utility District	Austin, TX	29 of 29	17.9 ppb	13,650
Kingsland	Kingsland, GA	46 of 47	17.6 ppb	22,448
Waukee Water Supply*	Waukee, IA	49 of 49	17.5 ppb	23,940
Urbandale Water Utility*	Urbandale, IA	48 of 48	17.5 ppb	45,600
City of Corsicana*	Corsicana, TX	54 of 54	17.5 ppb	24,190
Culkin Water District	Vicksburg, MS	4 of 4	17.5 ppb	11,698
City of Texas City	Texas City, TX	48 of 48	17.5 ppb	54,357
Brookesmith Special Utility District*	Brownwood, TX	48 of 48	17.4 ppb	12,621
Rogers County Rural Water District # 3 Lake Plant	Claremore, OK	25 of 25	17.4 ppb	10,470
Sioux City Water Supply*	Sioux City, IA	96 of 96	17.3 ppb	85,791
City of Vero Beach	Vero Beach, FL	8 of 8	17.3 ppb	37,308
Weir River Water System*	Hingham, MA	44 of 44	17.2 ppb	41,082
Ashland City*	Ashland, OH	49 of 49	17.2 ppb	20,648
Moon Twp Municipal Authority*	Moon Township, PA	48 of 48	17.2 ppb	38,000
Chickasha Municipal Authority*	Chickasha, OK	48 of 48	17.2 ppb	16,036
Rogers County RWD # 5*	Claremore, OK	48 of 48	17.2 ppb	11,782
Canandaigua-Farmington Consolidated WD*	North Tonawanda, NY	45 of 45	17.1 ppb	40,732
City of Palestine*	Palestine, TX	51 of 51	17.0 ppb	31,272
City of Brighton*	Brighton, CO	96 of 96	17.0 ppb	55,201
Clive Water Department	Clive, IA	48 of 48	17.0 ppb	18,601
City of Galveston*	Galveston, TX	96 of 96	17.0 ppb	52,326
City of Calexico	Calexico, CA	67 of 67	16.9 ppb	40,357
Joint Base Anacostia - Bolling	Washington, DC	6 of 6	16.9 ppb	19,312
Galveston County WCID 1	Dickinson, TX	54 of 54	16.8 ppb	29,832

EWG’s Tap
Water Database

Nitrate in
Tap Water

CONTAMINANT

Bromodichloromethane

STATES DETECTED

46

serves

253 million

utilities detected

24,979

states detected

46

serves

249 million

utilities detected

24,628

Overview

State, National, and Health Guidelines for Drinking Water

National Standard Exists

Health Concerns:

Want to remove
Bromodichloromethane from your water?

Bromodichloromethane around the Country

Utilities with the highest amounts of bromodichloromethane, 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

Bromodichloromethane

STATES DETECTED

46

serves

253 million

utilities detected

24,979

states detected

46

serves

249 million

utilities detected

24,628

Overview

State, National, and Health Guidelines for Drinking Water

National Standard Exists

Health Concerns:

Want to removeBromodichloromethane from your water?

Bromodichloromethane around the Country

Utilities with the highest amounts of bromodichloromethane, 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
Bromodichloromethane from your water?