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:
- Organ system toxicity (non-reproductive)
- Occupational hazards
- Ecotoxicology
- Neurotoxicity
- Persistence and bioaccumulation
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.
| State | Water Suppliers with Dichlorofluoromethane contamination | |
|---|---|---|
| Systems | Population | |
| Minnesota | 4 | 191,846 |
| Total | 4 | 191,846 |
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
| Rank | System | Population Served | Positive test results of total reported tests | Average Level (Range) |
|---|---|---|---|---|
| 1 | Saint Louis Park St Louis Park, MN | 44,126 | 24 of 27 | 1 ppb (0 to 2.1 ppb) |
| 2 | Medina Hamel, MN | 2,373 | 1 of 5 | 0.18 ppb (0 to 0.9 ppb) |
| 3 | Edina Edina, MN | 48,156 | 4 of 21 | 0.06 ppb (0 to 0.8 ppb) |
| 4 | Rochester Rochester, MN | 97,191 | 1 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 HazMap | DICHLOROMONOFLUOROMETHANE | •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 Ingredients | DICHLOROMONOFLUOROMETHANE | •Pesticide inerts: potentially toxic, testing priority, according to EPA (Environmental Protection Agency) |
| Environment Canada Domestic Substance List | METHANE, DICHLOROFLUORO- | •This chemical was NOT flagged by CEPA for further attention. The chemical was flagged for suspected persistence. |
| RTECS®- TLV/BEI,2007 | METHANE, DICHLOROFLUORO- | • occupationally related - ACGIH TLV (human TWA) |
| RTECS®- MSHA STANDARD-air: 3,81,1971 | METHANE, DICHLOROFLUORO- | • occupationally related - MSHA STANDARD-air (human TWA) |
| RTECS®- OSHA PEL (Construc): 29,1926 1994 | METHANE, DICHLOROFLUORO- | • occupationally related - OSHA PEL (Construc) (human TWA) |
| RTECS®- OSHA PEL (Fed Cont): 41,50-204 1994 | METHANE, DICHLOROFLUORO- | • occupationally related - OSHA PEL (Fed Cont) (human TWA) |
| RTECS®- OSHA PEL (Gen Indu): 29,1910 1994 | METHANE, DICHLOROFLUORO- | • occupationally related - OSHA PEL (Gen Indu) (human TWA) |
| RTECS®- OSHA PEL (Shipyard): 29,1915 1993 | METHANE, DICHLOROFLUORO- | • occupationally related - OSHA PEL (Shipyard) (human TWA) |
references
| government/industry list/academic study | reference |
| National Library of Medicine HazMap | NLM (National Library of Medicine). 2006. HazMap — Occupational Exposure to Hazardous Agents. |
| EPA Categorized List of Inert Pesticide Ingredients | EPA (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 List | EC (Environment Canada). 2008. Domestic Substances List Categorization. Canadian Environmental Protection Act (CEPA) Environmental Registry. |
| RTECS®- TLV/BEI,2007 | RTECS®- TLV/BEI,2007 |
| RTECS®- MSHA STANDARD-air: 3,81,1971 | RTECS®- MSHA STANDARD-air: 3,81,1971 |
| RTECS®- OSHA PEL (Construc): 29,1926 1994 | RTECS®- OSHA PEL (Construc): 29,1926.55,1994 |
| RTECS®- OSHA PEL (Fed Cont): 41,50-204 1994 | RTECS®- OSHA PEL (Fed Cont): 41,50-204.50,1994 |
| RTECS®- OSHA PEL (Gen Indu): 29,1910 1994 | RTECS®- OSHA PEL (Gen Indu): 29,1910.1000,1994 |
| RTECS®- OSHA PEL (Shipyard): 29,1915 1993 | RTECS®- OSHA PEL (Shipyard): 29,1915.1000,1993 |
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