EWG's Tap Water Database — 2021 UPDATE



Status: No national drinking water standard exists


Bromomethane, or methyl bromide, is a pesticide fumigant that was banned because it depletes the ozone layer.




states detected


utilities detected

4.8 million

people served

Health concerns for bromomethane

Harm to the brain and nervous system

Harm to fetal growth and child development

Harm to the lungs

Skin and eye irritation

States reporting bromomethane in drinking water

State UtilitiesPeople Served
New York70543,736
New Jersey6452,076
North Carolina547,515
South Carolina1367

Filtering technologies that reduce bromomethane

carbon filter icon

Activated Carbon

reverse osmosis icon

Reverse Osmosis

Utilities with the highest amounts of bromomethane, 2013-2019

UtilityLocationTestsAverage levelPeople served
Naval Support Facility, Indian HeadIndian Head, MD1 of 121.1 ppb3,321
J & R Mobile Home ParkBastrop, TX5 of 511.1 ppb30
Lakeside WaterKennard, TX1 of 37.43 ppb50
Lake Livingston BranchwoodLivingston, TX4 of 57.06 ppb55
Huttig WaterworksHuttig, AR3 of 116.07 ppb733
Wee Wood ParkMayville, NY19 of 255.88 ppb45
Lake Erie Mobile Home Park LLCFredonia, NY34 of 484.33 ppb320
Town of KitzmillerMountain Lake Park, MD2 of 23.84 ppb370
Bell WaterNew Waverly, TX5 of 52.56 ppb59
City of Giddings*Giddings, TX8 of 112.19 ppb7,428
Westwood Villa ApartmentsBlanco, TX8 of 112.19 ppb70
Cameron Parish Water and Water Works District 1Cameron, LA10 of 202.17 ppb972
Creston Public WaterCreston, WA3 of 101.92 ppb275
Villager ApartmentsColden, NY5 of 61.90 ppb40
Bradley Waterworks*Bradley, AR18 of 211.80 ppb567
Walnut Hill WaterBradley, AR18 of 211.80 ppb270
Cedar Hills Water AssociationGillette, WY1 of 11.80 ppb258
Prattsville Water DistrictPrattsville, NY25 of 401.80 ppb375
New London WaterStrong, AR5 of 81.76 ppb802
Wilmot WaterworksWilmot, AR5 of 51.71 ppb550
SmackoverSmackover, AR6 of 101.67 ppb2,821
Tennessee Water Supply CorporationTimpson, TX5 of 71.65 ppb384
Felsenthal WaterFelsenthal, AR13 of 221.61 ppb150
Alpine Manor Home For AdultsLima, NY4 of 51.60 ppb36
Woodbine Water DepartmentWoodbine, IA1 of 11.60 ppb1,464
Wildwood WaterEl Dorado, AR10 of 121.57 ppb1,350
Lamont Water SystemLamont, WA1 of 21.55 ppb88
Three Palms Mobilehome ParkSacramento, CA1 of 11.50 ppb300
Welton Water SupplyCalamus, IA1 of 11.50 ppb165
Glenview Apartments - LowerBinghamton, NY1 of 61.49 ppb164
Canal Fulton City Public Water SystemCanal Fulton, OH1 of 21.48 ppb5,479
Twin Fawn EstatesLowman, NY2 of 21.45 ppb50
Rockwood Borough Municipal Authority*Rockwood, PA2 of 21.38 ppb1,250
Milford Township Municipal AuthorityRockwood, PA2 of 21.38 ppb75
Osage County Public Water Supply District 4Argyle, MO1 of 21.30 ppb358
Big Tree Mobile Home ParkWest Seneca, NY3 of 71.16 ppb99
Louann Waterworks*El Dorado, AR9 of 121.15 ppb180
Shorewood Forest Water SystemRiverside, TX3 of 61.13 ppb305
Chenango RanchMagnolia, TX2 of 61.12 ppb51
Willbe Mobile Home ParkHopewell Junction, NY1 of 31.07 ppb45
Clay Water Supply CorporationDripping Springs, TX2 of 61.05 ppb156
Howlands Mobile Home ParkAthens, NY1 of 21.05 ppb35
Gilbertown (utilities Board of, Town of)Gilbertown, AL3 of 81.04 ppb8,157
PentwaterPentwater, MI1 of 11.000 ppb857
North Milam Water Supply CorporationCameron, TX1 of 111.000 ppb1,713
NorphletNorphlet, AR10 of 130.984 ppb1,112
Sunset TownhousesIthaca, NY2 of 40.975 ppb36
Sawkill Trailer ParkHyde Park, NY15 of 330.972 ppb186
Harris County Water Control and Improvement District 91Houston, TX1 of 50.960 ppb3,018
Olivehurst Public UDOlivehurst, CA1 of 40.950 ppb13,738

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

UtilityLocationTestsAverage levelPeople served
Olivehurst Public UDOlivehurst, CA1 of 40.950 ppb13,738
City of GreenvilleGreenville, MS15 of 180.843 ppb31,517
City of Stuart - Water PlantStuart, FL1 of 60.567 ppb19,000
West Monroe Water SystemWest Monroe, LA5 of 180.378 ppb15,930
Fitchburg Dpw, Div. of Water Supply*Fitchburg, MA1 of 90.322 ppb40,545
City of Alvin*Alvin, TX6 of 220.286 ppb24,000
Westchester County WD #2*Somers, NY1 of 70.264 ppb36,000
Easthampton Water DepartmentEasthampton, MA1 of 650.246 ppb16,053
Lee County WSCGiddings, TX1 of 440.227 ppb12,030
Midvale City Water SystemMidvale, UT4 of 340.182 ppb33,000
Dare County Water System*Kill Devil Hills, NC1 of 40.175 ppb22,766
Methuen Water Department*Methuen, MA1 of 50.160 ppb50,259
Glendale WaterworksGlendale, WI1 of 50.146 ppb12,883
Saratoga Springs City*Saratoga Springs, NY4 of 180.140 ppb35,900
Golden State Water Company (GSWC) - SouthwestGardena, CA5 of 240.135 ppb271,677
Lomita Water DepartmentLomita, CA2 of 80.104 ppb20,256
Village Water SystemPrinceton, LA2 of 160.0806 ppb10,644
City of LemooreLemoore, CA2 of 330.0779 ppb24,945
City of Pineville Water SystemPineville, LA2 of 200.0740 ppb20,315
South ElginSouth Elgin, IL2 of 120.0709 ppb22,549
Boone County Cons. PWSD1*Columbia, MO1 of 360.0694 ppb21,500
City of Santa RosaSanta Rosa, CA1 of 60.0667 ppb170,236
South Hadley FD #1 (MWRA)South Hadley, MA1 of 50.0660 ppb14,000
City of GautierGautier, MS1 of 140.0647 ppb18,572
City of GrandviewGrandview, WA1 of 160.0563 ppb11,010
Water Works District #1 of VermilionMaurice, LA2 of 140.0529 ppb21,600
City of OrangeOrange, TX3 of 150.0479 ppb18,643
City of AliceAlice, TX1 of 130.0438 ppb18,949
Carolina Beach Water SystemCarolina Beach, NC2 of 160.0438 ppb11,786
City of Seabrook*Seabrook, TX1 of 130.0400 ppb12,792
Rapides Parish Waterworks District 3*Tioga, LA1 of 120.0367 ppb19,983
City of SangerSanger, CA1 of 170.0341 ppb25,664
Sacramento County Water Authority - Laguna/Vineyard*Sacramento, CA4 of 1030.0335 ppb148,814
Queensbury Water District*Queensbury, NY1 of 210.0276 ppb39,799
Pennsylvania American Water Lake ScrantonWilkes-barre, PA2 of 200.0250 ppb134,570
City of CorinthGlen, MS1 of 100.0247 ppb16,000
Lyndhurst Water DepartmentLyndhurst, NJ2 of 170.0241 ppb20,500
Hoboken Water Services*Hoboken, NJ2 of 170.0241 ppb52,000
Jersey City Municipal Utilities Authority*Hoboken, NJ2 of 170.0241 ppb262,000
US Army Aviation and Missile CommandRedstone Arsenal, AL1 of 210.0221 ppb38,700
AnokaAnoka, MN1 of 150.0220 ppb18,000
Clearwater Water SystemClearwater, FL1 of 100.0220 ppb110,000
Norwalk Water DepartmentNorwalk, CA5 of 850.0212 ppb18,372
City of InglewoodInglewood, CA1 of 240.0204 ppb82,500
City of PleasantonPleasanton, TX1 of 450.0197 ppb13,776
Aurora City - Cleveland PWSAurora, OH1 of 300.0193 ppb15,852
Cleveland Public Water System*Cleveland, OH1 of 300.0193 ppb1,262,955
Bedford City PWSBedford, OH1 of 300.0193 ppb13,074
City of LakewoodLakewood, OH1 of 300.0193 ppb52,100
City of San JacintoSan Jacinto, CA1 of 140.0143 ppb14,435

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