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National Drinking Water Database


Trichlorofluoromethane in California


Trichlorofluoromethane (Freon 11) is a refrigerant, solvent, chemical intermediate and halocarbon aerosol that was banned in 2000 under the Montreal Protocol because of its ozone-depleting properties. [read more]

The Most Polluted Communities in California

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

Ranked by highest average Trichlorofluoromethane level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Christopher Sims Rentals
E. Linda, CA
301 of 15.2 ppb
(5.2 ppb)
2Poplar Comm Service Dist
Poplar, CA
1,9011 of 13.03 ppb
(3.03 ppb)
3Camrosa Water District
Camarillo, CA
27,00015 of 202.35 ppb
(0 to 10.1 ppb)
4Fcwwd #42/Alluvial & Fancher
Fresno, CA
2571 of 12.08 ppb
(2.08 ppb)
5Rurban Homes Mutual Water Co.
El Monte, CA
3006 of 211.9 ppb
(0 to 13.7 ppb)
6Keeler Csd
Keeler, CA
1801 of 10.8 ppb
(0.8 ppb)
7Yuima Municipal Water District Ida
Pauma Valley, CA
9961 of 100.72 ppb
(0 to 7.2 ppb)
8Calam - Parkway
Sacramento, CA
43,99646 of 1130.34 ppb
(0 to 1.73 ppb)
9Los Angeles Department of Water and Power
Los Angeles, CA
3,828,70038 of 3030.12 ppb
(0 to 3.38 ppb)
10City of Modesto
Modesto, CA
190,1061 of 2200.08 ppb
(0 to 17.5 ppb)

Health Based Limits for Trichlorofluoromethane

StandardDescriptionLevel
California Public Health GoalsDefined by the State of California Office of Environmental Health Hazard Assessment (OEHHA) as the level of contaminant that is allowed in drinking water. For acutely toxic substances, levels are set at which scientific evidence indicates that no known or anticipated adverse effects on health will occur, plus an adequate margin-of safety. PHGs for carcinogens or other substances which can cause chronic disease shall be based solely on health effects without regard to cost impacts and shall be set at levels which OEHHA has determined do not pose any significant risk to health.700 ppb
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.2000 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.2000 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.7000 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.7000 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.10000 ppb

Violation Summary for Trichlorofluoromethane in California

There are no violations reported for this contaminant in California