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National Drinking Water Database


National Drinking Water Database - Chemical Contaminants

Dichlorofluoromethane


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

Dichlorofluoromethane (Freon-21) is a refrigerant and ozone-depleting chemical scheduled to be phased out of use under the Montreal Protocol.

 
Detected
Found above
health guidelines
Found above
legal limit
States
1
-
-
Water utilities
4
-
-
People Served
191,846
-
-

Health Concerns for Dichlorofluoromethane:


Dichlorofluoromethane Exposure by State

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

StateWater Suppliers with Dichlorofluoromethane contamination
SystemsPopulation
Minnesota4191,846
Total4191,846

The Most Polluted Communities

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

Ranked by highest average Dichlorofluoromethane level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Saint Louis Park
St Louis Park, MN
44,12624 of 271 ppb
(0 to 2.1 ppb)
2Medina
Hamel, MN
2,3731 of 50.18 ppb
(0 to 0.9 ppb)
3Edina
Edina, MN
48,1564 of 210.06 ppb
(0 to 0.8 ppb)
4Rochester
Rochester, MN
97,1911 of 19< 0.01 ppb
(0 to 0.13 ppb)

Testing Summary for Dichlorofluoromethane

Are tests routinely required for Dichlorofluoromethane by federal law?No
Water suppliers reporting tests for Dichlorofluoromethane (2004-2008):800 of 47,576
Average testing rate for water supplier reporting tests (2004-2008):0.6 per year

Organ system toxicity (non-reproductive)

Type of concern: Reference:
Limited evidence of gastrointestinal or liver toxicity National Library of Medicine HazMap
One or more animal studies show effects at moderate doses (low dose studies may be unavailable for this ingredient) EPA Categorized List of Inert Pesticide Ingredients
Classified as not expected to be potentially toxic or harmful Environment Canada Domestic Substance List

Occupational hazards

Type of concern: Reference:
Allowed workplace exposures restricted to high doses RTECS®- TLV/BEI,2007
Allowed workplace exposures restricted to high doses RTECS®- MSHA STANDARD-air: 3,81,1971
Allowed workplace exposures restricted to high doses RTECS®- OSHA PEL (Gen Indu): 29,1910 1994
Allowed workplace exposures restricted to high doses RTECS®- OSHA PEL (Construc): 29,1926 1994
Allowed workplace exposures restricted to high doses RTECS®- OSHA PEL (Shipyard): 29,1915 1993
Allowed workplace exposures restricted to high doses RTECS®- OSHA PEL (Fed Cont): 41,50-204 1994

Ecotoxicology

Type of concern: Reference:
Not suspected to be an environmental toxin Environment Canada Domestic Substance List

Neurotoxicity

Type of concern: Reference:
nervous system - weight of evidence unknown/unassessed/unreview: published lit review or major tox study National Library of Medicine HazMap

Persistence and bioaccumulation

Type of concern: Reference:
Not suspected to be bioaccumulative Environment Canada Domestic Substance List



Government, industry, academic studies and classifications

government/industry list/academic study appears on list as classification(s)
National Library of Medicine HazMapDICHLOROMONOFLUOROMETHANE•Restricted - Regulations that have banned or restricted the use of the agent: See CHLOROFLUOROCARBONS;
•Hepatotoxin: Hepatotoxin, Secondary;
•Neurotoxin: CNS Solvent Syndrome;
•PEL (OSHA) - Permissible exposure limit (OSHA): 1000 ppm;
•LC50 - Lethal concentration in 50% of animals tested: 99800 ppm;
•TLV (ACGIH) - Threshold limit value (ACGIH): 10 ppm;
•IDLH (NIOSH) - Immediately Dangerous to Life or Health: 5000 ppm;
•MAK - Maximum Allowable Concentration (Federal Republic of Germany): 10 ppm;
EPA Categorized List of Inert Pesticide IngredientsDICHLOROMONOFLUOROMETHANE•Pesticide inerts: potentially toxic, testing priority, according to EPA (Environmental Protection Agency)
Environment Canada Domestic Substance ListMETHANE, DICHLOROFLUORO-•This chemical was NOT flagged by CEPA for further attention. The chemical was flagged for suspected persistence.
RTECS®- TLV/BEI,2007METHANE, DICHLOROFLUORO-• occupationally related - ACGIH TLV (human TWA)
RTECS®- MSHA STANDARD-air: 3,81,1971METHANE, DICHLOROFLUORO-• occupationally related - MSHA STANDARD-air (human TWA)
RTECS®- OSHA PEL (Construc): 29,1926 1994METHANE, DICHLOROFLUORO-• occupationally related - OSHA PEL (Construc) (human TWA)
RTECS®- OSHA PEL (Fed Cont): 41,50-204 1994METHANE, DICHLOROFLUORO-• occupationally related - OSHA PEL (Fed Cont) (human TWA)
RTECS®- OSHA PEL (Gen Indu): 29,1910 1994METHANE, DICHLOROFLUORO-• occupationally related - OSHA PEL (Gen Indu) (human TWA)
RTECS®- OSHA PEL (Shipyard): 29,1915 1993METHANE, DICHLOROFLUORO-• occupationally related - OSHA PEL (Shipyard) (human TWA)



references

government/industry list/academic study reference
National Library of Medicine HazMapNLM (National Library of Medicine). 2006. HazMap — Occupational Exposure to Hazardous Agents.
EPA Categorized List of Inert Pesticide IngredientsEPA (U.S. Environmental Protection Agency). 1987 & 2005. Office of Pesticide Programs. Inert (other) Pesticide Ingredients in Pesticide Products - Categorized List of Inert (other) Pesticide Ingredients.
Environment Canada Domestic Substance ListEC (Environment Canada). 2008. Domestic Substances List Categorization. Canadian Environmental Protection Act (CEPA) Environmental Registry.
RTECS®- TLV/BEI,2007RTECS®- TLV/BEI,2007
RTECS®- MSHA STANDARD-air: 3,81,1971RTECS®- MSHA STANDARD-air: 3,81,1971
RTECS®- OSHA PEL (Construc): 29,1926 1994RTECS®- OSHA PEL (Construc): 29,1926.55,1994
RTECS®- OSHA PEL (Fed Cont): 41,50-204 1994RTECS®- OSHA PEL (Fed Cont): 41,50-204.50,1994
RTECS®- OSHA PEL (Gen Indu): 29,1910 1994RTECS®- OSHA PEL (Gen Indu): 29,1910.1000,1994
RTECS®- OSHA PEL (Shipyard): 29,1915 1993RTECS®- OSHA PEL (Shipyard): 29,1915.1000,1993

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