Overview

Bromoform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromoform 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: 0.5 ppb

The EWG Health Guideline of 0.5 ppb for bromoform is 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, harm to reproduction and child development, and change 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
Bromoform from your water?

Try these filter technologies:

Activated Carbon,

Reverse Osmosis,

understand filter technology

Bromoform around the Country

	UTILITIES REPORTING ABOVE HEALTH GUIDELINES		UTILITIES WITH CONTAMINATION
State	Utilities	People Served	Utilities	People Served
California		931	26,574,611		1,238	33,644,235
Texas		2,349	19,669,682		3,327	28,397,439
Ohio		489	5,558,069		981	10,103,673
Pennsylvania		285	780,063		697	7,453,630
New Jersey		104	1,563,989		355	7,409,969
New York		408	714,952		892	6,308,328
Florida		59	1,579,163		128	6,027,102
Illinois		379	1,514,016		788	5,362,146
Colorado		281	1,568,527		534	4,227,475
Louisiana		367	1,507,653		669	3,797,951
Washington		244	573,686		481	3,675,350
North Carolina		236	2,027,333		343	3,279,535
Wisconsin		69	333,994		383	3,248,837
Massachusetts		47	624,894		221	3,216,850
Oklahoma		367	1,114,211		567	3,065,489
Nevada		46	2,380,461		91	3,008,301
Missouri		185	571,679		487	3,002,522
Virginia		53	132,334		181	2,998,941
Utah		55	467,271		173	2,789,230
Indiana		40	341,328		141	2,196,511
Maryland		15	104,073		24	2,114,995
Iowa		242	1,086,973		471	1,932,603
New Mexico		230	1,569,640		326	1,915,201
Arizona		158	1,733,331		221	1,864,228
Kansas		472	1,305,428		734	1,750,519
South Carolina		43	224,813		166	1,586,002
Minnesota		77	806,165		191	1,575,642
Georgia		58	198,795		262	1,552,047
Hawaii		67	999,283		91	1,374,829
Nebraska		76	288,633		136	1,316,566
Tennessee		11	169,981		41	1,247,439
Connecticut		41	74,796		155	1,156,974
Alabama		17	104,716		75	923,367
District Of Columbia		0	0		4	866,635
Idaho		14	283,101		24	703,235
West Virginia		52	198,618		170	689,102
Delaware		12	23,579		67	565,131
Arkansas		120	360,973		188	516,717
North Dakota		67	110,552		132	410,254
Wyoming		49	67,260		126	304,757
Rhode Island		6	87,088		17	204,561
Montana		49	40,883		125	161,175
Vermont		25	12,774		76	71,483
Mississippi		17	37,827		28	54,176
Alaska		21	8,472		53	46,695
Maine		3	3,461		3	3,461

SHOW LESS

Utilities with the highest amounts of bromoform, 2021-2023

ALL UTILITIES

LARGE UTILITIES

Utility	Location	Tests	Average level	People served
Linville-haile Water System	Marion, LA	23 of 23	184.0 ppb	1,635
Jones Mcginty Water System	Jones, LA	17 of 17	181.3 ppb	696
Litroe Water System	Marion, LA	22 of 22	180.9 ppb	369
West Sterlington Water System	Sterlington, LA	24 of 24	168.9 ppb	1,095
Rowena Water Supply Corporation	Rowena, TX	12 of 12	138.4 ppb	714
Pleasant Hills-crossroads Water Systems	Joyce, LA	25 of 25	133.5 ppb	840
Wards Chapel Water System	Farmerville, LA	24 of 24	129.3 ppb	1,350
Concord Water System	Marion, LA	26 of 26	122.6 ppb	414
City of Paint Rock	Paint Rock, TX	12 of 12	106.3 ppb	275
Salem Water System	Farmerville, LA	22 of 26	106.2 ppb	753
Darbonne Ws North	Bernice, LA	24 of 24	104.5 ppb	3,186
Tri-water System	Farmerville, LA	24 of 24	103.3 ppb	1,245
Marion Water System*	Marion, LA	24 of 24	101.5 ppb	1,098
Richland County Valley View Wua	Sidney, MT	5 of 5	95.0 ppb	85
Township 29 Water Association	Mount Vernon, WA	8 of 8	93.8 ppb	42
Sardis Water System	Gilbert, LA	24 of 24	90.5 ppb	1,404
Mountain Park Public Works Authority	Mountain Park, OK	12 of 12	88.5 ppb	473
Indiahoma Public Works Authority	Indiahoma, OK	12 of 12	88.5 ppb	350
Matagorda County Water Control and Improvement District 2	Sargent, TX	7 of 7	87.2 ppb	564
Paxton Water Supply Corporation	Joaquin, TX	23 of 23	86.8 ppb	1,168
Centerville Water Supply Corporation	Groveton, TX	27 of 27	85.9 ppb	1,329
Sunset Bay	Spring, TX	7 of 7	83.1 ppb	108
Ellwood Mutual Water Company	Santa Barbara, CA	4 of 4	79.5 ppb	186
Millersview-doole Water Supply Corporation*	Millersview, TX	27 of 30	77.7 ppb	3,987
Lee County Water Association*	Marianna, AR	24 of 24	77.0 ppb	3,615
Manitou	Tipton, OK	12 of 12	76.5 ppb	278
Arrowhead Beach Co-op Water Association	Mount Vernon, WA	12 of 13	74.6 ppb	168
Backwood Village Water System	Saline, LA	24 of 24	73.3 ppb	783
Hamler Village	Hamler, OH	24 of 24	72.5 ppb	627
Moro Waterworks	Moro, AR	24 of 24	72.2 ppb	236
Randolph Water System	Junction City, LA	23 of 24	71.6 ppb	249
Gary Water Supply Corporation	Gary, TX	23 of 27	71.3 ppb	1,050
Dewees Utilities (sc1050011)	Dewees Island, SC	24 of 24	68.8 ppb	43
Farmerville Water System	Farmerville, LA	25 of 25	64.1 ppb	5,400
South Desoto Water System	Mansfield, LA	24 of 24	63.3 ppb	936
Oaks At Houston Point	Cypress, TX	15 of 15	62.8 ppb	165
Somerville Place	Cypress, TX	21 of 23	60.9 ppb	525
Jean Utility Services Inc.	Las Vegas, NV	1 of 1	60.7 ppb	160
Jardines Del Valle	Santa Cruz, CA	11 of 11	60.0 ppb	130
Beacham Apartments No. 2	Jacksonville, NC	10 of 10	59.6 ppb	475
Clay Water Supply Corporation	Dripping Springs, TX	14 of 15	59.1 ppb	210
Rancho Colina Mobile Home Park	Morro Bay, CA	7 of 7	59.0 ppb	250
City of Coahoma	Coahoma, TX	24 of 24	59.0 ppb	3,552
Turtle Cove Lot Owners Association	Freeport, TX	14 of 14	58.7 ppb	67
Cape San Juan Water District	Friday Harbor, WA	12 of 12	58.5 ppb	158
Las Deltas Mutual Water System	Firebaugh, CA	1 of 1	58.0 ppb	375
Village of Georgetown Water Supply	Georgetown, LA	24 of 24	57.0 ppb	363
Village of Calvin Water System	Calvin, LA	25 of 25	56.7 ppb	591
Snug Harbor Rv Lp	Walnut Grove, CA	12 of 12	56.7 ppb	24
Lake Shreve Estates Water System	Frierson, LA	17 of 24	56.4 ppb	96

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

Utility	Location	Tests	Average level	People served
Hudson Water Supply Corporation	Lufkin, TX	52 of 52	41.4 ppb	10,890
City of Big Spring*	Big Spring, TX	51 of 51	35.8 ppb	27,282
Town of Discovery Bay	Discovery Bay, CA	36 of 36	34.5 ppb	16,790
City of Hanford	Hanford, CA	49 of 51	31.8 ppb	62,127
Cape Girardeau	Cape Girardeau, MO	8 of 8	31.3 ppb	39,941
City of Mendota	Mendota, CA	48 of 48	30.1 ppb	11,404
Altus*	Altus, OK	54 of 54	30.1 ppb	18,717
Gowc North Water System	West Monroe, LA	34 of 35	29.8 ppb	13,287
City of San Juan	San Juan, TX	54 of 54	29.8 ppb	30,027
City of San Angelo*	San Angelo, TX	99 of 99	28.6 ppb	101,004
Nueces County WCID 3*	Robstown, TX	48 of 48	28.3 ppb	13,200
El Dorado Waterworks*	El Dorado, AR	51 of 52	27.1 ppb	17,932
South Island PSD	Hilton Head Island, SC	47 of 48	26.4 ppb	18,299
City of Mercedes*	Mercedes, TX	51 of 51	25.2 ppb	16,258
Ector County Utility District	Odessa, TX	48 of 48	24.7 ppb	15,300
City of Midland	Midland, TX	93 of 99	24.0 ppb	142,344
City of Hollister*	Hollister, CA	126 of 126	23.5 ppb	23,358
West Monroe Water System	West Monroe, LA	47 of 48	23.3 ppb	16,005
Oldsmar Water System	Oldsmar, FL	2 of 2	23.2 ppb	14,731
Eunice Water System (LAWCO)	Baton Rouge, LA	47 of 48	23.0 ppb	15,588
City of Lemoore	Lemoore, CA	43 of 44	23.0 ppb	27,038
City of Rockport*	Rockport, TX	48 of 48	22.9 ppb	28,539
West Hwy 80 Ark Road WS	West Monroe, LA	48 of 48	22.5 ppb	14,649
McAllen Public Utility	Mcallen, TX	102 of 102	21.6 ppb	183,534
City of Ingleside	Ingleside, TX	44 of 44	20.4 ppb	10,106
City of La Habra	La Habra, CA	776 of 933	20.2 ppb	63,118
Hobbs Municipal Water Supply	Hobbs, NM	6 of 6	20.2 ppb	39,700
City of Abilene*	Abilene, TX	105 of 105	20.1 ppb	125,182
Laguna Madre Water District	Port Isabel, TX	54 of 54	19.9 ppb	19,908
Texas A&M University Main Campus	College Station, TX	53 of 54	19.6 ppb	61,000
City of Portland	Portland, TX	48 of 48	19.5 ppb	20,536
American Water O&m, Llc - Vsfb	Vandenberg Afb, CA	44 of 47	19.2 ppb	14,971
City of Odessa*	Odessa, TX	96 of 99	18.8 ppb	123,334
Horizon Regional MUD	Horizon City, TX	48 of 51	18.5 ppb	31,542
Bertie County Regional Water	Windsor, NC	9 of 10	18.4 ppb	12,893
Coalinga	Coalinga, CA	48 of 48	18.3 ppb	17,277
City of Mission	Mission, TX	51 of 51	18.0 ppb	77,058
United Water Cons District*	Oxnard, CA	23 of 25	18.0 ppb	240,000
Nueces County WCID 4	Port Aransas, TX	48 of 48	17.8 ppb	14,880
Peru	Peru, IL	6 of 6	17.5 ppb	10,300
Gowc East Water System	West Monroe, LA	20 of 20	17.5 ppb	11,742
West Des Moines Water Works	West Des Moines, IA	96 of 96	17.4 ppb	68,723
City of Abbeville Water System	Abbeville, LA	49 of 49	17.4 ppb	14,445
City of Bastrop*	Bastrop, TX	33 of 33	17.3 ppb	13,209
Military Highway WSC - Progreso	Progreso, TX	50 of 50	16.8 ppb	11,136
City of Minot*	Null, ND	48 of 48	16.7 ppb	48,743
Marco Rural Water Company*	Marion, SC	35 of 48	16.6 ppb	15,082
City of Edinburg	Edinburg, TX	102 of 102	16.5 ppb	85,224
Morris	Morris, IL	6 of 6	16.4 ppb	15,335
City of Elgin	Elgin, TX	11 of 11	16.3 ppb	10,598

EWG’s Tap
Water Database

Nitrate in
Tap Water

CONTAMINANT

Bromoform

STATES DETECTED

46

serves

168 million

utilities detected

16,583

states detected

45

serves

79 million

utilities detected

8,936

Overview

State, National, and Health Guidelines for Drinking Water

National Standard Exists

Health Concerns:

Want to remove
Bromoform from your water?

Bromoform around the Country

Utilities with the highest amounts of bromoform, 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

Bromoform

STATES DETECTED

46

serves

168 million

utilities detected

16,583

states detected

45

serves

79 million

utilities detected

8,936

Overview

State, National, and Health Guidelines for Drinking Water

National Standard Exists

Health Concerns:

Want to removeBromoform from your water?

Bromoform around the Country

Utilities with the highest amounts of bromoform, 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
Bromoform from your water?