EWG's Tap Water Database — 2019 UPDATE



Status: No national drinking water standard exists


Tetrahydrofuran is a solvent used for production of polyvinyl chloride (PVC) plastics and adhesives.




states detected


utilities detected

2.6 million

people served

Health concerns for tetrahydrofuran

Change to fetal growth and development

States reporting tetrahydrofuran in drinking water

State UtilitiesPeople Served
New Jersey333,130
New Hampshire92,330
New York160

Utilities with the highest amounts of tetrahydrofuran, 2015-2017

UtilityLocationTestsAverage levelPeople served
Lake Livingston Eagles Nest WaterLivingston, TX1 of 11,581.0 ppb65
Ladd Hill Mobile Home ParkFranklin, NH1 of 4847.5 ppb68
City of RenoAzle, TX5 of 21284.8 ppb2,566
Rockhouse MountainConway, NH2 of 5204.6 ppb412
Water Association of North LakeAubrey, TX1 of 3202.3 ppb57
City of Bridge CityBridge City, TX1 of 8145.0 ppb9,455
Mcfarland Village ApartmentsHouston, TX1 of 387.0 ppb120
City of AndrewsAndrews, TX2 of 384.3 ppb11,088
River Club WaterHouston, TX1 of 538.0 ppb297
Shady Oaks EstatesConroe, TX2 of 636.7 ppb648
Mooreland Subdivision Water SystemCypress, TX2 of 535.2 ppb144
Johnson CreekDurham, NH1 of 235.0 ppb50
Windsor Water Utility NorthMorrisonville, WI1 of 435.0 ppb400
Timberland EstatesPorter, TX1 of 929.3 ppb1,983
Fort Bend County Municipal Utility District 35Houston, TX1 of 329.0 ppb6,609
Fort Bend County Municipal Utility District 34*Houston, TX1 of 329.0 ppb3,756
Canterbury Spruces HousingConcord, NH1 of 125.8 ppb25
Snug Harbor Inn Mobile Home ParkDelavan, WI1 of 125.0 ppb30
Delsea Woods Community LLCGreen Creek, NJ1 of 124.9 ppb95
Enchanted ForestVidor, TX1 of 624.0 ppb279
Canyon Lake Mobile Home EstatesAustin, TX1 of 623.3 ppb1,656
Bachelor KnollsGranby, MA1 of 123.0 ppb101
Encinal Water Supply CorporationEncinal, TX1 of 722.4 ppb1,338
Chaparral Place Water SystemPorter, TX1 of 317.3 ppb114
Sullivan County ComplexUnity, NH1 of 317.2 ppb625
Possum Kingdom Water Supply CorporationGraford, TX1 of 315.1 ppb5,309
Fort Belknap Water Supply Corporation*Graham, TX1 of 313.2 ppb5,235
Graham East Water Supply CorporationGraham, TX1 of 313.2 ppb694
City of Graham*Graham, TX1 of 313.2 ppb8,792
Cypress Lakes Water SystemCleveland, TX1 of 613.0 ppb315
Governors GreenLondonderry, NH1 of 213.0 ppb25
City of PothPoth, TX1 of 313.0 ppb2,100
Woodhaven EstatesHouston, TX1 of 312.7 ppb138
City of JasperJasper, TX3 of 1411.4 ppb10,388
Mcwhorters Live Oak LodgeBlackwell, TX1 of 310.4 ppb50
Town North Village Water SystemLubbock, TX1 of 610.1 ppb335
City of Archer City*Archer City, TX1 of 39.03 ppb1,848
Oakwood Water SystemPflugerville, TX1 of 59.00 ppb162
Spicewood Beach Water Supply CorporationAustin, TX1 of 38.67 ppb1,353
Crotched Mountain Rehab CenterGreenfield, NH1 of 68.17 ppb750
The Villages ResortAvondale, TX2 of 78.11 ppb2,037
Riviera Mobile Home ParkPlano, TX1 of 37.53 ppb75
Matagorda County Water Control and Improvement District 5Blessing, TX1 of 77.14 ppb1,059
Toledo Village Water Supply CorporationJasper, TX1 of 66.50 ppb1,610
Crazy Horse Ranch WaterWeatherford, TX1 of 56.48 ppb177
Washington County RailroadConroe, TX1 of 76.43 ppb648
Shenandoah EstatesFort Worth, TX1 of 36.17 ppb270
Lake Livingston Big Thicket Lake 2Livingston, TX1 of 66.00 ppb435
Cottages At WindchimesConcord, NH1 of 26.00 ppb75
Monroe Water DepartmentWoodsville, NH1 of 45.75 ppb300

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

UtilityLocationTestsAverage levelPeople served
City of AndrewsAndrews, TX2 of 384.3 ppb11,088
City of JasperJasper, TX3 of 1411.4 ppb10,388
Harris County MUD 55 Heritage ParkHouston, TX1 of 64.50 ppb15,671
Lakeway MUD*Lakeway, TX1 of 31.97 ppb10,673
East Cedar Creek FWSD BrookshireMabank, TX1 of 31.82 ppb13,170
City of AngletonAngleton, TX1 of 71.71 ppb18,120
San Antonio Water System Northeast*San Antonio, TX1 of 61.27 ppb50,772
City of BudaBuda, TX1 of 160.875 ppb10,680
Stone Harbor Water DepartmentStone Harbor, NJ1 of 20.745 ppb31,000
City of HurstHurst, TX1 of 100.503 ppb38,410
Manville WSC*Coupland, TX1 of 240.292 ppb26,253
City of Balch SpringsBalch Springs, TX1 of 90.193 ppb30,234
City of CarrolltonCarrollton, TX1 of 90.193 ppb127,980
City of CoppellCoppell, TX1 of 90.193 ppb39,880
City of Farmers BranchFarmers Branch, TX1 of 90.193 ppb31,560
City of IrvingIrving, TX1 of 90.193 ppb238,829
Town of AddisonAddison, TX1 of 90.193 ppb15,458
City of Seagoville*Seagoville, TX1 of 90.193 ppb15,240
City of Lancaster*Lancaster, TX1 of 90.193 ppb37,550
City of DuncanvilleDuncanville, TX1 of 90.193 ppb39,826
City of DesotoDesoto, TX1 of 90.193 ppb51,700
Dallas Water Utility*Dallas, TX1 of 90.193 ppb1,197,816
City of Kilgore*Kilgore, TX1 of 90.148 ppb13,738
Clwsc Canyon Lake Shores*Canyon Lake, TX1 of 450.113 ppb15,960
City of Grand Prairie*Grand Prairie, TX1 of 220.0305 ppb187,050

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