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National Drinking Water Database


National Drinking Water Database - Chemical Contaminants

Chlorodifluoromethane


Status: Unregulated - EPA has not established a maximum legal limit in tapwater for this contaminant.

Chlorodifluoromethane is a manufactured chemical historically used as a refrigerant and as an intermediate in the production of fluoropolymers; scheduled for phase-out due to its ozone depletion potential and potent greenhouse gas activity.

 
Detected
Found above
health guidelines
Found above
legal limit
States
1
-
-
Water utilities
3
-
-
People Served
132,400
-
-

Chlorodifluoromethane Exposure by State

Water utilities in 1 states have reported detecting Chlorodifluoromethane in treated tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies.

StateWater Suppliers with Chlorodifluoromethane contamination
SystemsPopulation
New York3132,400
Total3132,400

The Most Polluted Communities

3 water utilities reported detecting Chlorodifluoromethane in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Chlorodifluoromethane level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Manhasset Lakeville Wd
Manhasset, NY
43,00042 of 781.83 ppb
(0 to 15 ppb)
2Jericho Wd
Syosset, NY
58,0004 of 40.65 ppb
(0.6 to 0.7 ppb)
3WA of Great Neck North
Great Neck, NY
31,4002 of 250.03 ppb
(0 to 0.5 ppb)

Testing Summary for Chlorodifluoromethane

Are tests routinely required for Chlorodifluoromethane by federal law?No
Water suppliers reporting tests for Chlorodifluoromethane (2006-2009):5 of 47,576
Average testing rate for water supplier reporting tests (2006-2009):5.5 per year