The Power of Information

National Drinking Water Database


Hicksville Wd Utilities - Great Neck, NY


Serves 47,810 people

Dichlorodifluoromethane

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.
 
This Drinking Water System
Test Days Exceeding Health GuidelinesDefinition of what this is
0 days
Test Days Exceeding Legal LimitsNumber of days in which the samples taken in that day exceed the Maximum Contaminant Level (Depending on the contaminant and its MCL, that may or may not trigger an MCL violation. Some MCLs are based on averages spanning several months to a year)
0 days
Test DaysNumber of days in which this chemical has reported results in the data we received from the State
187 days
Tests ConductedNumber of individual tests done for this contaminant
945 tests

Testing Summary

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
DichlorodifluoromethaneDichlorodifluoromethane (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.0.05 ppb
0.8 ppb
No
1000 ppb
Legal at any levelThis is the Federal Limit. State Limits may be lower.
NOTE: Each dot in the above graph represents one month.
* Water utilities are noted as exceeding the legal limit if any test is above the maximum contaminant level (MCL). Most MCLs are based on annual averages so exceeding the MCL for one test does not necessarily indicate that the system is out of compliance.

Health Based and Legal Limits for Dichlorodifluoromethane

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

Testing Results

Testing DateAverage
Result
Samples taken that dayNumber of Non-DetectsRange of Results
2009-03-010 ppb110 ppb
2009-03-010 ppb440 ppb
2009-03-010 ppb330 ppb
2009-03-010 ppb220 ppb
2009-03-010 ppb440 ppb
2009-03-010 ppb220 ppb
2009-03-010 ppb440 ppb
2009-03-010 ppb110 ppb
2009-03-010 ppb440 ppb
2009-03-010 ppb330 ppb
2009-02-010 ppb440 ppb
2009-02-010 ppb440 ppb
2009-02-010 ppb330 ppb
2009-02-010.2 ppb540 to 1 ppb
2009-02-010 ppb330 ppb
2009-02-010 ppb330 ppb
2009-02-010 ppb440 ppb
2009-01-010 ppb440 ppb
2009-01-010 ppb990 ppb
2009-01-010 ppb330 ppb
2009-01-010 ppb110 ppb
2009-01-010.35 ppb210 to 0.7 ppb
2009-01-010 ppb440 ppb
2009-01-010 ppb440 ppb
2008-12-010 ppb550 ppb
2008-12-010 ppb440 ppb
2008-12-010.14 ppb540 to 0.7 ppb
2008-12-010 ppb880 ppb
2008-12-010 ppb440 ppb
2008-12-010 ppb550 ppb
2008-12-010 ppb440 ppb
2008-11-010 ppb440 ppb
2008-11-010 ppb220 ppb
2008-11-010 ppb660 ppb
2008-11-010.22 ppb11100 to 2.4 ppb
2008-11-010.23 ppb970 to 1.4 ppb
2008-11-010 ppb330 ppb
2008-10-010 ppb440 ppb
2008-10-010 ppb550 ppb
2008-10-010 ppb770 ppb
2008-10-010.23 ppb1080 to 1.3 ppb
2008-10-010.23 ppb320 to 0.7 ppb
2008-10-010 ppb330 ppb
2008-09-010 ppb550 ppb
2008-09-010 ppb550 ppb
2008-09-010 ppb220 ppb
2008-09-010.3 ppb320 to 0.9 ppb
2008-09-010 ppb440 ppb
2008-09-010 ppb330 ppb
2008-09-010 ppb770 ppb
2008-09-010 ppb550 ppb
2008-09-010 ppb660 ppb
2008-08-010 ppb440 ppb
2008-08-010 ppb550 ppb
2008-08-010 ppb550 ppb
2008-08-010.2 ppb12100 to 1.2 ppb
2008-08-010.09 ppb980 to 0.8 ppb
2008-07-010 ppb660 ppb
2008-07-010 ppb550 ppb
2008-07-010 ppb550 ppb
2008-07-010 ppb110 ppb
2008-07-010.16 ppb11100 to 1.8 ppb
2008-07-010 ppb880 ppb
2008-07-010 ppb550 ppb
2008-06-010 ppb440 ppb
2008-06-010 ppb440 ppb
2008-06-010 ppb330 ppb
2008-06-010 ppb220 ppb
2008-06-010.18 ppb860 to 0.9 ppb
2008-06-010 ppb330 ppb
2008-06-010 ppb110 ppb
2008-06-010 ppb550 ppb
2008-05-010.16 ppb750 to 0.6 ppb
2008-05-010 ppb440 ppb
2008-05-010.2 ppb320 to 0.6 ppb
2008-05-010.35 ppb210 to 0.7 ppb
2008-05-010 ppb440 ppb
2008-04-010 ppb220 ppb
2008-04-010 ppb220 ppb
2008-04-010 ppb770 ppb
2008-04-010 ppb990 ppb
2008-04-010 ppb220 ppb
2008-03-010 ppb440 ppb
2008-03-010.45 ppb210 to 0.9 ppb
2008-03-010 ppb440 ppb
2008-03-010 ppb220 ppb
2008-03-010.15 ppb430 to 0.6 ppb
2008-03-010 ppb110 ppb
2008-03-010 ppb220 ppb
2008-02-010.1 ppb980 to 0.9 ppb
2008-02-010.16 ppb540 to 0.8 ppb
2008-02-010.27 ppb320 to 0.8 ppb
2008-02-010 ppb440 ppb
2008-01-010 ppb550 ppb
2008-01-010.09 ppb760 to 0.6 ppb
2008-01-010 ppb330 ppb
2008-01-010 ppb660 ppb
2007-12-010.15 ppb430 to 0.6 ppb
2007-12-010 ppb330 ppb
2007-12-010 ppb440 ppb
2007-12-010 ppb330 ppb
2007-12-010 ppb770 ppb
2007-12-010 ppb220 ppb
2007-11-010.08 ppb650 to 0.5 ppb
2007-11-010 ppb880 ppb
2007-11-010.8 ppb100.8 ppb
2007-11-010 ppb110 ppb
2007-11-010 ppb330 ppb
2007-10-010 ppb330 ppb
2007-10-010.13 ppb650 to 0.8 ppb
2007-10-010.05 ppb11100 to 0.5 ppb
2007-10-010.3 ppb320 to 0.9 ppb
2007-09-010.6 ppb430 to 2.4 ppb
2007-09-010 ppb220 ppb
2007-09-010.38 ppb540 to 1.9 ppb
2007-09-010.13 ppb760 to 0.9 ppb
2007-09-010.24 ppb540 to 1.2 ppb
2007-08-010 ppb550 ppb
2007-08-010.23 ppb870 to 1.8 ppb
2007-08-010.12 ppb11100 to 1.3 ppb
2007-07-010.5 ppb210 to 1 ppb
2007-07-010 ppb770 ppb
2007-07-010 ppb880 ppb
2007-07-010 ppb770 ppb
2007-06-010 ppb220 ppb
2007-06-010.21 ppb1070 to 0.7 ppb
2007-06-010 ppb330 ppb
2007-06-010 ppb550 ppb
2007-06-010 ppb330 ppb
2007-05-010 ppb550 ppb
2007-05-010 ppb880 ppb
2007-05-010 ppb110 ppb
2007-05-010.13 ppb760 to 0.9 ppb
2007-04-010 ppb660 ppb
2007-04-010 ppb770 ppb
2007-04-010.43 ppb430 to 1.7 ppb
2007-04-010.3 ppb540 to 1.5 ppb
2007-03-010 ppb330 ppb
2007-03-010 ppb770 ppb
2007-03-010 ppb12120 ppb
2007-02-010.06 ppb13120 to 0.8 ppb
2007-02-010 ppb330 ppb
2007-02-010 ppb550 ppb
2007-01-010 ppb990 ppb
2007-01-010 ppb11110 ppb
2006-12-010 ppb770 ppb
2006-12-010 ppb990 ppb
2006-12-010 ppb550 ppb
2006-11-010 ppb16160 ppb
2006-11-010 ppb770 ppb
2006-11-010 ppb550 ppb
2006-11-010 ppb20200 ppb
2006-10-010 ppb550 ppb
2006-10-010 ppb550 ppb
2006-10-010 ppb880 ppb
2006-09-010 ppb550 ppb
2006-09-010 ppb330 ppb
2006-09-010 ppb440 ppb
2006-09-010 ppb440 ppb
2006-09-010 ppb550 ppb
2006-09-010 ppb110 ppb
2006-08-010 ppb770 ppb
2006-08-010 ppb440 ppb
2006-08-010 ppb440 ppb
2006-07-010 ppb550 ppb
2006-07-010 ppb550 ppb
2006-07-010 ppb770 ppb
2006-06-010 ppb11110 ppb
2006-06-010 ppb770 ppb
2006-05-010 ppb440 ppb
2006-05-010 ppb110 ppb
2006-05-010 ppb440 ppb
2006-05-010 ppb220 ppb
2006-05-010 ppb330 ppb
2006-05-010 ppb220 ppb
2006-05-010 ppb660 ppb
2006-04-010 ppb880 ppb
2006-04-010 ppb660 ppb
2006-04-010 ppb550 ppb
2006-03-010 ppb330 ppb
2006-03-010 ppb660 ppb
2006-03-010 ppb220 ppb
2006-03-010 ppb550 ppb
2006-02-010 ppb770 ppb
2006-02-010 ppb990 ppb
2006-01-010 ppb770 ppb
2006-01-010 ppb990 ppb