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CONTAMINANT

1,1,1-Trichloroethane

STATES DETECTED

15

serves

2.0 million

utilities detected

92

Overview

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.

State, National, and Health Guidelines for Drinking Water

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

National Standard Exists

Health Concerns:

  • Harm to the brain and nervous system

Want to remove
1,1,1-Trichloroethane from your water?

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Activated Carbon, 

Reverse Osmosis, 

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1,1,1-Trichloroethane around the Country

UTILITIES WITH CONTAMINATION
State Utilities People Served
California171,148,735
Indiana4189,005
New York18174,822
Illinois3150,481
Pennsylvania1157,758
Minnesota354,152
Connecticut352,469
New Jersey437,275
Florida1136,000
Ohio633,484
Massachusetts329,238
Wisconsin214,206
West Virginia26,435
Alaska2461
Washington3295

Utilities with the highest amounts of 1,1,1-trichloroethane, 2021-2023

ALL UTILITIES
LARGE UTILITIES
Utility Location Tests Average level People served
Bets Water SystemCoupeville, WA2 of 225.9 ppb50
Laurel Mobile Home ParkNokomis, FL1 of 65.57 ppb24
Grafton WaterworksGrafton, WI39 of 905.18 ppb11,745
Coraopolis Water & Sewer Authority*Coraopolis, PA8 of 81.86 ppb5,804
Hinsdale Town Water DistrictHinsdale, NY3 of 31.15 ppb350
Nikishka BayAnchorage, AK4 of 41.10 ppb420
Milford City Public Water SystemMilford, OH33 of 341.02 ppb6,700
Hansons Landing Mobile Home ParkMilton, PA1 of 30.930 ppb86
Schodack Consolidated Water District 101Castleton, NY1 of 10.800 ppb1,068
Mcconnellsburg Borough Municipal AuthorityMc Connellsburg, PA6 of 120.760 ppb2,000
Vevay Water DepartmentVevay, IN1 of 10.656 ppb1,750
Birchview PropertiesFairbanks, AK4 of 40.600 ppb41
Umh Arbor EstatesMorgantown, PA1 of 30.600 ppb920
East Deer Township Water DepartmentCreighton, PA1 of 40.525 ppb2,000
Tarentum Borough Water Department*Tarentum, PA1 of 40.525 ppb4,927
Villa MargaretOkeechobee, FL1 of 10.500 ppb132
Soundings Yacht & Tennis ClubHobe Sound, FL1 of 10.500 ppb450
Hialeah GardensHialeah Gardens, FL1 of 10.500 ppb22,200
Pine Tree Mobile Home ParkStamford, NY1 of 10.500 ppb44
Big Flats Water District #2Big Flats, NY5 of 120.410 ppb5,110
Cassadaga Village*Cassadaga, NY3 of 50.398 ppb760
Pomfret Water District #8 - Lily DaleFredonia, NY3 of 50.398 ppb400
Dix Hills Water DistrictHuntington, NY1 of 10.395 ppb34,522
Indian River Shores Mobile Home ParkMicco, FL1 of 10.390 ppb55
Greenlawn WDGreenlawn, NY1 of 10.350 ppb42,000
Expressview Community Water AssociationMansfield, OH1 of 10.300 ppb300
Edna Mahan CorrectionalClinton, NJ1 of 10.300 ppb1,080
Pompton Lakes MuaPompton Lakes, NJ3 of 50.297 ppb11,435
Hillcrest Estates, Inc.Zephyrhills, FL1 of 10.290 ppb130
Taconic Estates Water DistrictHopewell Jctn, NY2 of 80.284 ppb115
Plainview WDPlainview, NY70 of 3160.276 ppb35,000
Oak Park Trailer Court LLCTitusville, FL1 of 10.270 ppb90
Rainier TerracePort Orchard, WA1 of 30.263 ppb125
Holden Water Division, DPWHolden, MA10 of 260.255 ppb17,106
Silver Lake Institute - Castile Water District #1Castile, NY1 of 20.250 ppb440
Perry Center Water DistrictPerry, NY1 of 20.250 ppb150
Gardeau Water DistrictSilver Springs, NY1 of 20.250 ppb60
Perry Village*Perry, NY1 of 20.250 ppb4,348
New BrightonNew Brighton, MN1 of 10.240 ppb22,902
Lafayette Water Works*Lafayette, IN2 of 60.237 ppb70,835
Dayton Water UtilityDayton, IN2 of 60.237 ppb1,420
Timberlane Mobile EstatesNapavine, WA1 of 30.213 ppb120
MomenceMomence, IL2 of 60.208 ppb3,180
Bellefontaine City PWSBellefontaine, OH2 of 30.200 ppb13,249
Newport Water/sewer District Public Water SystemNewport, OH1 of 10.200 ppb1,582
Grafton Water District*Grafton, MA2 of 270.192 ppb10,703
E Greenville Borough Water DepartmentEast Greenville, PA1 of 60.133 ppb3,100
Westbury WDWestbury, NY39 of 2290.128 ppb20,500
Angelica Village Public WaterAngelica, NY1 of 40.125 ppb950
Rockford*Rockford, IL7 of 410.119 ppb147,051

* 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, WI39 of 905.18 ppb11,745
Hialeah GardensHialeah Gardens, FL1 of 10.500 ppb22,200
Dix Hills Water DistrictHuntington, NY1 of 10.395 ppb34,522
Greenlawn WDGreenlawn, NY1 of 10.350 ppb42,000
Pompton Lakes MuaPompton Lakes, NJ3 of 50.297 ppb11,435
Plainview WDPlainview, NY70 of 3160.276 ppb35,000
Holden Water Division, DPWHolden, MA10 of 260.255 ppb17,106
New BrightonNew Brighton, MN1 of 10.240 ppb22,902
Lafayette Water Works*Lafayette, IN2 of 60.237 ppb70,835
Bellefontaine City PWSBellefontaine, OH2 of 30.200 ppb13,249
Grafton Water District*Grafton, MA2 of 270.192 ppb10,703
Westbury WDWestbury, NY39 of 2290.128 ppb20,500
Rockford*Rockford, IL7 of 410.119 ppb147,051
Great Oaks Water Company Inc.*San Jose, CA3 of 280.104 ppb108,902
Paw Glen Alsace DivMechanicsburg, PA3 of 210.0905 ppb24,951
Sunrise SouthwestFort Lauderdale, FL1 of 40.0675 ppb10,750
AnokaAnoka, MN1 of 40.0650 ppb18,000
San Jose State UniversitySan Jose, CA11 of 1810.0625 ppb30,000
San Jose Water Company*San Jose, CA11 of 1810.0625 ppb1,007,514
Moorestown Water DepartmentMoorestown, NJ5 of 420.0398 ppb20,700
Mounds ViewMounds View, MN1 of 60.0383 ppb13,250
Urbana City PWSUrbana, OH7 of 240.0367 ppb11,428
Manchester Water Department*Manchester, CT1 of 490.0106 ppb51,198
South Bend Water WorksSouth Bend, IN1 of 760.00671 ppb115,000
Franklin Square WDFranklin Square, NY2 of 1950.00544 ppb20,000

* 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.

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