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.

2015-2017:

FOUND

states detected

utilities detected

3.3 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	Utilities	People Served
California		22	2,545,582
New York		16	621,981
Ohio		5	34,658
Wisconsin		9	22,090
Idaho		1	14,125
Missouri		2	12,266
Washington		4	8,130
Nebraska		1	1,171
Maine		2	300
New Hampshire		1	228
Delaware		1	93
Vermont		1	45
Rhode Island		1	33

LESS

Utilities with the highest amounts of dichlorodifluoromethane, 2015-2017

ALL UTILITIES

LARGE UTILITIES

Utility	Location	Tests	Average level	People served
Sugar Tree Club	Newburg, MO	1 of 1	1.42 ppb	66
Altoona Waterworks	Altoona, WI	9 of 9	1.40 ppb	7,345
San Bernardino City*	San Bernardino, CA	470 of 783	1.33 ppb	188,931
Island Nursing Home	Deer Isle, ME	1 of 1	1.30 ppb	240
Garden City	Garden City, NY	41 of 385	0.984 ppb	46,000
Birch Hill Water System	Charlestown, VT	1 of 1	0.900 ppb	45
Meridian Heights Water District	Olympia, WA	1 of 1	0.900 ppb	126
Stratford Waterworks	Stratford, WI	3 of 3	0.890 ppb	1,651
California Water Service - Livermore	Livermore, CA	119 of 159	0.855 ppb	56,700
Woodland, City Of	Woodland, WA	1 of 6	0.783 ppb	5,315
California Water Service - Stockton	San Jose, CA	67 of 152	0.773 ppb	185,346
Adirondack Airport Community	Saranac Lake, NY	3 of 4	0.700 ppb	90
Sunny Gables- Glenburn Housing	Bangor, ME	1 of 1	0.670 ppb	60
Mount Baldy Homeowners Association	Mt. Baldy, CA	3 of 3	0.607 ppb	350
Hemlock Village	Foster, RI	2 of 2	0.530 ppb	33
City of Chubbuck	Chubbuck, ID	1 of 1	0.520 ppb	14,125
Stage Village Mobile Home Community	Dagsboro, DE	2 of 3	0.417 ppb	93
Colby Waterworks	Colby, WI	8 of 8	0.391 ppb	1,829
Tainter Woods Condominiums	Colfax, WI	1 of 1	0.390 ppb	85
City of Fresno*	Fresno, CA	46 of 956	0.384 ppb	522,352
Fcsa #39 A&b	Fresno, CA	46 of 956	0.384 ppb	465
Rib Mountain Sanitary District	Wausau, WI	2 of 2	0.370 ppb	5,850
Abbotsford Waterworks	Abbotsford, WI	4 of 4	0.370 ppb	1,956
Fruitridge Vista Water Company	Sacramento, CA	17 of 45	0.362 ppb	15,000
San Gabriel Valley Water Company - Fontana	Fontana, CA	189 of 524	0.336 ppb	213,209
Progressive Flat Water Association	Tonasket, WA	2 of 3	0.333 ppb	150
Okanogan Water Department, City Of*	Okanogan, WA	2 of 3	0.333 ppb	2,539
Tenney Brook II	Ashland, NH	2 of 4	0.325 ppb	228
Crandon Waterworks	Crandon, WI	1 of 1	0.300 ppb	1,958
Boone County PWSD 9	Columbia, MO	1 of 5	0.282 ppb	12,200
California Water Service (CWS) - Los Altos Suburban	San Jose, CA	2 of 68	0.281 ppb	68,404
Withee Waterworks*	Withee, WI	2 of 2	0.265 ppb	480
Mineola	Mineola, NY	50 of 255	0.240 ppb	20,600
Stromsburg, City of	Stromsburg, NE	3 of 8	0.235 ppb	1,171
Roslyn WD*	Roslyn, NY	7 of 43	0.127 ppb	18,000
Glenwood Water District	Glenwood Landing, NY	7 of 43	0.127 ppb	1,000
City of Upland*	Upland, CA	1 of 10	0.120 ppb	78,791
Carlisle City Public Water System	Carlisle, OH	1 of 5	0.112 ppb	4,897
Franklin Public Water System*	Franklin, OH	1 of 5	0.112 ppb	11,396
City of Anaheim	Anaheim, CA	13 of 171	0.0942 ppb	450,000
Hempstead	Hempstead, NY	19 of 179	0.0925 ppb	56,000
City of Modesto	Modesto, CA	7 of 169	0.0740 ppb	212,000
Round Lake Village (Clifton Park Water Authority)	Round Lake, NY	1 of 15	0.0667 ppb	650
Clifton Park Water Authority*	Clifton Park, NY	1 of 15	0.0667 ppb	39,710
Hicksville WD	Hicksville, NY	48 of 682	0.0647 ppb	48,000
Cathedral Gardens Water District	West Hempstead, NY	6 of 79	0.0539 ppb	1,500
West Hempstead WD*	West Hempstead, NY	6 of 79	0.0539 ppb	33,531
Milford City Public Water System	Milford, OH	1 of 19	0.0263 ppb	6,400
East Orange County Water District - Rz	Orange, CA	1 of 19	0.0263 ppb	3,000
Wright-Patterson AFB Area B PWS	Wright Patterson Afb, OH	1 of 65	0.0195 ppb	11,034

* 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.

Utility	Location	Tests	Average level	People served
San Bernardino City*	San Bernardino, CA	470 of 783	1.33 ppb	188,931
Garden City	Garden City, NY	41 of 385	0.984 ppb	46,000
California Water Service - Livermore	Livermore, CA	119 of 159	0.855 ppb	56,700
California Water Service - Stockton	San Jose, CA	67 of 152	0.773 ppb	185,346
City of Chubbuck	Chubbuck, ID	1 of 1	0.520 ppb	14,125
City of Fresno*	Fresno, CA	46 of 956	0.384 ppb	522,352
Fruitridge Vista Water Company	Sacramento, CA	17 of 45	0.362 ppb	15,000
San Gabriel Valley Water Company - Fontana	Fontana, CA	189 of 524	0.336 ppb	213,209
Boone County PWSD 9	Columbia, MO	1 of 5	0.282 ppb	12,200
California Water Service (CWS) - Los Altos Suburban	San Jose, CA	2 of 68	0.281 ppb	68,404
Mineola	Mineola, NY	50 of 255	0.240 ppb	20,600
Roslyn WD*	Roslyn, NY	7 of 43	0.127 ppb	18,000
City of Upland*	Upland, CA	1 of 10	0.120 ppb	78,791
Franklin Public Water System*	Franklin, OH	1 of 5	0.112 ppb	11,396
City of Anaheim	Anaheim, CA	13 of 171	0.0942 ppb	450,000
Hempstead	Hempstead, NY	19 of 179	0.0925 ppb	56,000
City of Modesto	Modesto, CA	7 of 169	0.0740 ppb	212,000
Clifton Park Water Authority*	Clifton Park, NY	1 of 15	0.0667 ppb	39,710
Hicksville WD	Hicksville, NY	48 of 682	0.0647 ppb	48,000
West Hempstead WD*	West Hempstead, NY	6 of 79	0.0539 ppb	33,531
Wright-Patterson AFB Area B PWS	Wright Patterson Afb, OH	1 of 65	0.0195 ppb	11,034
Jurupa Community Services District*	Jurupa Valley, CA	2 of 64	0.0181 ppb	106,907
WA of Great Neck North	Great Neck, NY	9 of 447	0.0145 ppb	31,400
South Farmingdale WD	Farmingdale, NY	1 of 308	0.00520 ppb	44,700
New York American Water - Lynbrook	Merrick, NY	2 of 481	0.00252 ppb	220,000
Jericho Water District	Syosset, NY	1 of 632	0.000854 ppb	58,000