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EWG's Tap Water Database — 2019 UPDATE

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1,1,1-Trichloroethane

Status: National drinking water standard exists

 

1,1,1-Trichloroethane is a solvent and a degreasing agent used for manufacturing metal products and as ingredient in cleaners and aerosols. Exposure to 1,1,1-trichloroethane can harm the nervous system, liver and circulatory system.

2015-2017:

FOUND

20

states detected

134

utilities detected

5.0 million

people served

Health concerns for 1,1,1-trichloroethane

Harm to the brain and nervous system

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 200 ppb

The legal limit for 1,1,1-trichloroethane, established in 1987, was based on toxicity studies conducted in laboratory animals in the 1970s and 1980s.

ppb = parts per billion

States reporting 1,1,1-trichloroethane in drinking water

UTILITIES WITH CONTAMINATION
State UtilitiesPeople Served
New York271,829,699
California171,292,116
New Jersey18466,942
Florida12426,682
Wisconsin7278,491
Indiana5190,076
Illinois4162,257
Connecticut5121,319
Pennsylvania1395,224
Massachusetts350,342
West Virginia938,472
Washington510,219
Ohio16,400
Virginia11,975
North Carolina11,763
Arkansas11,353
North Dakota11,280
Vermont1642
Alaska2511
Nevada1150
MORE
LESS

Filtering technologies that reduce 1,1,1-trichloroethane

carbon filter icon

Activated Carbon

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Reverse Osmosis

Utilities with the highest amounts of 1,1,1-trichloroethane, 2015-2017

ALL UTILITIES
LARGE UTILITIES
UtilityLocationTestsAverage levelPeople served
Bets Water SystemOak Harbor, WA3 of 316.6 ppb50
Grafton WaterworksGrafton, WI35 of 755.95 ppb11,745
Madisonburg Water WorksMadisonburg, PA3 of 34.32 ppb250
Umh Valley View Danboro Mobile Home ParkDoylestown, PA3 of 33.37 ppb920
Hinsdale Town Water DistrictHinsdale, NY3 of 32.67 ppb350
Grafton Water District*Grafton, MA4 of 282.28 ppb10,703
Coraopolis Water & Sewer Authority*Coraopolis, PA4 of 52.14 ppb5,804
Nikishka BayAnchorage, AK3 of 31.49 ppb470
Edna Mahan CorrectionalClinton, NJ1 of 11.22 ppb1,080
Mcconnellsburg Borough Municipal AuthorityMcconnellsburg, PA11 of 171.05 ppb2,000
Washington Pike PsdWellsburg, WV2 of 21.01 ppb3,571
Wellsburg, City Of*Wellsburg, WV2 of 21.01 ppb3,468
Rolla, City ofRolla, ND2 of 20.950 ppb1,280
Rainier TerraceOlympia, WA4 of 40.935 ppb125
Holden Water Division, DPWHolden, MA12 of 250.920 ppb16,942
Milford City Public Water SystemMilford, OH9 of 190.914 ppb6,400
Lomira WaterworksLomira, WI6 of 110.875 ppb2,461
Birchview PropertiesFairbanks, AK4 of 40.750 ppb41
Easton Water Div*Easton, MA2 of 100.730 ppb22,697
Hicksville WDHicksville, NY173 of 6820.653 ppb48,000
Olivet Public Water DistrictGeorgetown, IL2 of 30.627 ppb325
Georgetown*Georgetown, IL2 of 30.627 ppb3,678
Aberdeen Pate Water Company Inc.*Aurora, IN1 of 10.500 ppb4,688
South Huntington Water DepartmentSouth Huntington, NY3 of 30.492 ppb81,760
East Middlebury Fd 1E Middlebury, VT1 of 30.433 ppb642
Charlotte Courthouse, Town ofCharlotte Courthouse, VA1 of 40.375 ppb1,975
Riverside VillagePainted Post, NY2 of 30.367 ppb492
Painted Post Village*Painted Post, NY2 of 30.367 ppb2,334
Mason County Psd-camp ConleyPoint Pleasant, WV1 of 20.350 ppb458
Point Pleasant Water Works*Pt. Pleasant, WV1 of 20.350 ppb5,290
Cassadaga VillageCassadaga, NY5 of 120.331 ppb760
Unadilla VillageUnadilla, NY2 of 40.315 ppb1,128
Upper Hanover Water Authority*East Greenville, PA4 of 110.273 ppb4,600
MineolaMineola, NY31 of 2550.272 ppb20,600
Ashwood ApartmentsChester Springs, PA3 of 70.257 ppb75
RockfordRockford, IL13 of 540.252 ppb155,000
Auburn Water SystemCrestview, FL7 of 70.250 ppb22,015
Indiantown CompanyIndiantown, FL1 of 20.250 ppb5,000
Franklin Square WDFranklin Square, NY59 of 2240.216 ppb20,000
Great Oaks Water Company Inc.San Jose, CA5 of 240.215 ppb99,199
Garfield Water DepartmentGarfield, NJ13 of 420.210 ppb30,487
Weirton Area Water Board*Weirton, WV2 of 40.188 ppb22,694
Brooke County PsdWellsburg, WV2 of 40.188 ppb240
Oakland Psd Golden Key AcresWeirton, WV2 of 40.188 ppb506
Bethpage WDBethpage, NY75 of 4960.184 ppb33,000
Lafayette Water Works*Lafayette, IN2 of 60.180 ppb67,140
Dayton Water UtilityDayton, IN2 of 60.180 ppb1,420
Westbury WDWestbury, NY46 of 1750.177 ppb20,500
Garden CityGarden City, NY30 of 3850.168 ppb46,000
HempsteadHempstead, NY14 of 1790.157 ppb56,000

* 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 1,1,1-Trichloroethane, but it likely has the contaminant in its water supply.

UtilityLocationTestsAverage levelPeople served
Grafton WaterworksGrafton, WI35 of 755.95 ppb11,745
Grafton Water District*Grafton, MA4 of 282.28 ppb10,703
Holden Water Division, DPWHolden, MA12 of 250.920 ppb16,942
Easton Water Div*Easton, MA2 of 100.730 ppb22,697
Hicksville WDHicksville, NY173 of 6820.653 ppb48,000
South Huntington Water DepartmentSouth Huntington, NY3 of 30.492 ppb81,760
MineolaMineola, NY31 of 2550.272 ppb20,600
RockfordRockford, IL13 of 540.252 ppb155,000
Auburn Water SystemCrestview, FL7 of 70.250 ppb22,015
Franklin Square WDFranklin Square, NY59 of 2240.216 ppb20,000
Great Oaks Water Company Inc.San Jose, CA5 of 240.215 ppb99,199
Garfield Water DepartmentGarfield, NJ13 of 420.210 ppb30,487
Weirton Area Water Board*Weirton, WV2 of 40.188 ppb22,694
Bethpage WDBethpage, NY75 of 4960.184 ppb33,000
Lafayette Water Works*Lafayette, IN2 of 60.180 ppb67,140
Westbury WDWestbury, NY46 of 1750.177 ppb20,500
Garden CityGarden City, NY30 of 3850.168 ppb46,000
HempsteadHempstead, NY14 of 1790.157 ppb56,000
Plainview WDPlainview, NY25 of 2330.138 ppb35,000
South Bend Water WorksSouth Bend, IN10 of 590.132 ppb112,400
Manchester Water Department*Manchester, CT6 of 490.0980 ppb51,066
Paw Glen Alsace DivBirdsboro, PA2 of 150.0933 ppb22,000
City of San Jose - EVG/EDV/COYSan Jose, CA1 of 130.0923 ppb93,300
San Jose Water Company*San Jose, CA15 of 2090.0756 ppb998,000
San Jose State UniversitySan Jose, CA15 of 2090.0756 ppb30,000
Swta - Main System*Allentown, PA2 of 180.0633 ppb16,000
Valley Water Systems, Inc.Plainville, CT2 of 240.0463 ppb18,231
Miramar (East & West) PlantsMiramar, FL1 of 60.0417 ppb128,729
Hudson WaterworksHudson, WI1 of 100.0400 ppb17,100
Moorestown Water DepartmentMoorestown, NJ5 of 160.0375 ppb20,700
Jericho Water DistrictSyosset, NY27 of 6320.0373 ppb58,000
Suffolk County Water Authority*Oakdale, NY3 of 30.0359 ppb1,100,000
Smithtown WDKings Park, NY3 of 30.0359 ppb19,635
St James WDSt James, NY3 of 30.0359 ppb10,587
Perkasie Regional AuthorityPerkasie, PA1 of 320.0344 ppb11,100
Wallingford Water DepartmentWallingford, CT1 of 170.0294 ppb37,267
Lee County Utilities*Fort Myers, FL1 of 70.0286 ppb236,944
Port Washington WD38 Sqndy Hollow Rd, NY9 of 2640.0258 ppb34,000
NJ American Water - Western*Jericho, NJ1 of 460.0196 ppb264,586
Elmira Water Board*Elmira, NY2 of 560.0191 ppb65,631
Emmaus Borough Public Water*Emmaus, PA2 of 600.0183 ppb14,000
CTWC - Unionville SystemClinton, CT1 of 370.0168 ppb14,693
South Farmingdale WDFarmingdale, NY1 of 3080.0136 ppb44,700
Town of Hempstead Water DepartmentEast Meadow, NY2 of 6290.00447 ppb110,000
Cedarburg L & W CommissionCedarburg, WI1 of 720.00319 ppb11,900
Madison Water Utility*Madison, WI1 of 1000.00280 ppb235,000

* 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 1,1,1-Trichloroethane, but it likely has the contaminant in its water supply.