The Power of Information

National Drinking Water Database


Dichlorodifluoromethane in Maine


Dichlorodifluoromethane (Freon 12) is a chlorofluorocarbon refrigerant and aerosol spray propellant; it was banned under the Montreal Protocol as of 2000 because of its ozone-depleting properties.

The Most Polluted Communities in Maine

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

Ranked by highest average Dichlorodifluoromethane level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Island Nursing Home
Deer Isle, ME
2401 of 14.1 ppb
(4.1 ppb)
2The Meadows
Greene, ME
491 of 11.3 ppb
(1.3 ppb)
3Sunny Gables- Glenburn Housing
Holden, ME
745 of 51.12 ppb
(0.92 to 1.3 ppb)
4Penobscot Nursing Home
Penobscot, ME
1501 of 10.9 ppb
(0.9 ppb)
5A Place For All Seasons
Caribou, ME
902 of 30.83 ppb
(0 to 1.8 ppb)
6Ridgewood Apartments
Bangor, ME
531 of 20.36 ppb
(0 to 0.71 ppb)
7Polyots Mobile Home Park
Corinth, ME
731 of 20.21 ppb
(0 to 0.41 ppb)
8Wentworth Mobile Home Park
Bangor, ME
752 of 60.12 ppb
(0 to 0.45 ppb)

Health Based Limits for Dichlorodifluoromethane

StandardDescriptionLevel
Lifetime health-based limit, non-cancer riskConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for a lifetime of exposure. The Lifetime health-based limit (or Health Advisory, HA) is based on exposure for a a 70-kg adult consuming 2 liters of water per day. Source: U.S. Environmental Protection Agency.1000 ppb
Health-Based Screening LevelA benchmark concentration of contaminants in water that may be of potential concern for human health, if exceeded. For noncarcinogens, the HBSL represents the contaminant concentration in drinking water that is not expected to cause any adverse effects over a lifetime of exposure. For carcinogens, the HBSL range represents the contaminant concentration in drinking water that corresponds to an excess estimated lifetime cancer risk of 1 chance in 1 million to 1 chance in 10 thousand. Source: U.S. Geological Survey.1000 ppb
Drinking Water Equivalent LevelA lifetime exposure concentration protective of adverse, noncarcinogenic health effects, that assumes all of the exposure to a contaminant is from drinking water. Source: U.S. Environmental Protection Agency.5000 ppb
Children's health-based limit for 1-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for up to one day of exposure. The One-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.40000 ppb
Children's health-based limit for 10-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic effects for up to ten days of exposure. The Ten-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.40000 ppb

Violation Summary for Dichlorodifluoromethane in Maine

There are no violations reported for this contaminant in Maine