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EWG's Tap Water Database — 2021 UPDATE

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Dichlorodifluoromethane

Status: No national drinking water standard exists

 

Dichlorodifluoromethane (Freon-12) is a refrigerant, solvent and aerosol propellant banned in 2000 under the Montreal Protocol because of its ozone-depleting properties. Freons can cause heart, nervous system and liver damage.

2017-2019:

FOUND

13

states detected

68

utilities detected

2.3 million

people served

Health concerns for dichlorodifluoromethane

Harm to the liver

Change to the central nervous system

Harm to the heart and blood vessels

States reporting dichlorodifluoromethane in drinking water

UTILITIES WITH CONTAMINATION
State UtilitiesPeople Served
California161,779,274
New York26431,223
Alabama138,700
Massachusetts331,066
Ohio423,624
Wisconsin820,921
Idaho114,125
Delaware16,422
Washington42,897
Nebraska11,171
New Hampshire1228
Vermont145
Rhode Island133
MORE
LESS

Utilities with the highest amounts of dichlorodifluoromethane, 2017-2019

ALL UTILITIES
LARGE UTILITIES
UtilityLocationTestsAverage levelPeople served
The MeadowsGreene, ME1 of 12.50 ppb33
California Water Service (CWS) - North Garden*San Jose, CA7 of 431.74 ppb24,167
Meridian Heights Water DistrictPort Orchard, WA2 of 21.35 ppb126
Altoona WaterworksAltoona, WI20 of 201.32 ppb7,345
Island Nursing HomeDeer Isle, ME1 of 11.30 ppb173
San Bernardino City*San Bernardino, CA920 of 1,6511.20 ppb188,931
Birch Hill Water SystemCharlestown, VT2 of 21.000 ppb45
Garden CityGarden City, NY83 of 7310.950 ppb46,000
Adirondack Airport CommunitySaranac Lake, NY6 of 70.857 ppb90
Stratford WaterworksStratford, WI4 of 40.725 ppb1,651
Sugar Tree ClubNewburg, MO1 of 20.710 ppb50
Hamilton Water DepartmentHamilton, MA1 of 10.690 ppb8,430
California Water Service - LivermoreLivermore, CA229 of 3750.663 ppb56,700
Sunny Gables- Glenburn HousingGlenburn, ME2 of 20.610 ppb60
Mount Baldy Homeowners AssociationMt. Baldy, CA3 of 30.607 ppb350
Town of CulpeperCulpeper, VA1 of 10.600 ppb17,411
Woodland City OfWoodland, WA1 of 80.588 ppb5,720
City of ChubbuckChubbuck, ID1 of 10.520 ppb14,125
Abbotsford WaterworksAbbotsford, WI8 of 80.505 ppb1,956
Ausable Heights Water SystemKeeseville, NY1 of 10.500 ppb46
Tainter Woods CondominiumsColfax, WI1 of 10.390 ppb85
Fruitridge Vista Water CompanySacramento, CA36 of 970.389 ppb15,000
Crandon WaterworksCrandon, WI2 of 20.380 ppb1,958
California Water Service - StocktonSan Jose, CA48 of 2550.372 ppb185,346
City of Fresno*Fresno, CA93 of 1,8310.371 ppb522,352
Fcsa #39 A&bFresno, CA93 of 1,8310.371 ppb465
Rib Mountain Sanitary DistrictWausau, WI2 of 20.370 ppb5,850
Colby WaterworksColby, WI14 of 150.351 ppb1,829
San Gabriel Valley Water Company - FontanaFontana, CA379 of 1,0070.340 ppb213,209
DeytonaPort Angeles, WA1 of 20.335 ppb50
Foster Senior Housing Inc.Foster, RI3 of 50.324 ppb33
Northernaire Sanitary DistrictThree Lakes, WI1 of 10.320 ppb300
Stage Village Mobile Home CommunityDagsboro, DE3 of 60.307 ppb93
Stromsburg, City ofStromsburg, NE5 of 140.303 ppb1,171
Withee Waterworks*Withee, WI4 of 40.300 ppb480
Classic HeightsGig Harbor, WA1 of 40.250 ppb482
Progressive Flat Water AssociationTonasket, WA4 of 80.238 ppb150
Okanogan Water Department City Of*Okanogan, WA4 of 80.238 ppb2,571
MineolaMineola, NY95 of 5040.228 ppb20,600
Snowtree CondominiumWest Dover, VT1 of 30.200 ppb302
Tenney Brook IIAshland, NH2 of 70.186 ppb228
California Water Service (CWS) - Los Altos SuburbanSan Jose, CA2 of 1160.165 ppb68,404
Cathedral Gardens Water DistrictWest Hempstead, NY39 of 2610.162 ppb1,500
West Hempstead WD*West Hempstead, NY39 of 2610.162 ppb33,531
Boone County PWSD 9Columbia, MO1 of 100.141 ppb12,200
Silver Lake Institute - Castile Water District #1, NY1 of 40.125 ppb440
Perry Center Water DistrictPerry, NY1 of 40.125 ppb150
Perry Village*, NY1 of 40.125 ppb4,348
Gardeau Water DistrictCastile, NY1 of 40.125 ppb60
City of Upland*Upland, CA4 of 390.107 ppb78,791

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

UtilityLocationTestsAverage levelPeople served
California Water Service (CWS) - North Garden*San Jose, CA7 of 431.74 ppb24,167
San Bernardino City*San Bernardino, CA920 of 1,6511.20 ppb188,931
Garden CityGarden City, NY83 of 7310.950 ppb46,000
California Water Service - LivermoreLivermore, CA229 of 3750.663 ppb56,700
Town of CulpeperCulpeper, VA1 of 10.600 ppb17,411
City of ChubbuckChubbuck, ID1 of 10.520 ppb14,125
Fruitridge Vista Water CompanySacramento, CA36 of 970.389 ppb15,000
California Water Service - StocktonSan Jose, CA48 of 2550.372 ppb185,346
City of Fresno*Fresno, CA93 of 1,8310.371 ppb522,352
San Gabriel Valley Water Company - FontanaFontana, CA379 of 1,0070.340 ppb213,209
MineolaMineola, NY95 of 5040.228 ppb20,600
California Water Service (CWS) - Los Altos SuburbanSan Jose, CA2 of 1160.165 ppb68,404
West Hempstead WD*West Hempstead, NY39 of 2610.162 ppb33,531
Boone County PWSD 9Columbia, MO1 of 100.141 ppb12,200
City of Upland*Upland, CA4 of 390.107 ppb78,791
US Army Aviation and Missile CommandRedstone Arsenal, AL2 of 130.0805 ppb38,700
Franklin Public Water System*Franklin, OH1 of 70.0800 ppb11,396
City of AnaheimAnaheim, CA22 of 3420.0708 ppb450,000
Clifton Park Water Authority*Clifton Park, NY2 of 320.0700 ppb39,710
Hicksville WDHicksville, NY88 of 1,3910.0635 ppb48,000
HempsteadHempstead, NY37 of 4970.0603 ppb56,000
Roslyn WD*Roslyn, NY8 of 1200.0500 ppb18,000
City of ModestoModesto, CA9 of 3040.0484 ppb212,000
Bourne Water District*Pocasset, MA1 of 440.0223 ppb22,500
Sparta Twp Water Utility - Lake MohawkSparta, NJ1 of 350.0171 ppb17,628
WA of Great Neck NorthGreat Neck, NY17 of 8710.0137 ppb31,400
Wright-Patterson AFB Area B PWSWright Patterson Afb, OH1 of 1100.0115 ppb11,034
California Water Service (CWS) - Bakersfield*San Jose, CA4 of 5150.00845 ppb246,371
California Water Service (CWS) - VisaliaSan Jose, CA6 of 5690.00680 ppb135,923
Franklin Square WDFranklin Square, NY4 of 4430.00603 ppb20,000
Jurupa Community Services District*Jurupa Valley, CA1 of 1900.00284 ppb106,907
South Farmingdale WDFarmingdale, NY1 of 6390.00250 ppb44,700
New York American Water - LynbrookMerrick, NY2 of 9740.00124 ppb220,000
Cal-water Service Company - ChicoChico, CA1 of 7650.000758 ppb100,435
Jericho Water DistrictSyosset, NY1 of 1,0880.000496 ppb58,000

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