The Power of Information

National Drinking Water Database

Manhasset Lakeville Wd Utilities - Great Neck, NY

Serves 43,000 people


Chlorodifluoromethane is a manufactured chemical historically used as a refrigerant and as an intermediate in the production of fluoropolymers; scheduled for phase-out due to its ozone depletion potential and potent greenhouse gas activity.
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
78 days
Tests ConductedNumber of individual tests done for this contaminant
256 tests

Testing Summary

Health Limit
Legal Limit

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
ChlorodifluoromethaneChlorodifluoromethane is a manufactured chemical historically used as a refrigerant and as an intermediate in the production of fluoropolymers; scheduled for phase-out due to its ozone depletion potential and potent greenhouse gas activity.1.83 ppb
15 ppb
NoLegal 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 Chlorodifluoromethane

Health Based Limits for Chlorodifluoromethane

There are no health based standards that EWG is using for this chemical

Testing Results

Testing DateAverage
Samples taken that dayNumber of Non-DetectsRange of Results
2009-03-011.15 ppb640 to 4.9 ppb
2009-03-010 ppb440 ppb
2009-02-010.66 ppb970 to 3.2 ppb
2009-02-011.6 ppb430 to 6.4 ppb
2009-01-014.5 ppb540 to 22.5 ppb
2009-01-011.56 ppb760 to 10.9 ppb
2009-01-011.42 ppb650 to 8.5 ppb
2008-12-010 ppb110 ppb
2008-12-014.38 ppb850 to 17.8 ppb
2008-12-013.45 ppb650 to 20.7 ppb
2008-11-0110.7 ppb1010.7 ppb
2008-11-014.1 ppb203.9 to 4.3 ppb
2008-11-010 ppb220 ppb
2008-11-010 ppb110 ppb
2008-10-014.9 ppb204.6 to 5.2 ppb
2008-10-010 ppb110 ppb
2008-10-019.2 ppb109.2 ppb
2008-09-012.93 ppb310 to 5 ppb
2008-09-010.61 ppb760 to 4.3 ppb
2008-08-010.92 ppb650 to 5.5 ppb
2008-08-011.18 ppb430 to 4.7 ppb
2008-08-010 ppb110 ppb
2008-07-010 ppb110 ppb
2008-07-010 ppb220 ppb
2008-07-013.7 ppb310 to 5.9 ppb
2008-07-011.12 ppb540 to 5.6 ppb
2008-06-012.64 ppb740 to 6.4 ppb
2008-06-012.67 ppb320 to 8 ppb
2008-05-015.3 ppb105.3 ppb
2008-05-011.8 ppb430 to 7.2 ppb
2008-05-012.1 ppb210 to 4.2 ppb
2008-02-015.7 ppb105.7 ppb
2007-12-010 ppb110 ppb
2007-12-010 ppb330 ppb
2007-12-010.95 ppb430 to 3.8 ppb
2007-11-010 ppb110 ppb
2007-11-010 ppb220 ppb
2007-11-010.67 ppb650 to 4 ppb
2007-10-010 ppb550 ppb
2007-10-010.37 ppb640 to 1.7 ppb
2007-10-010 ppb220 ppb
2007-10-010.55 ppb430 to 2.2 ppb
2007-09-010 ppb330 ppb
2007-09-010 ppb330 ppb
2007-09-010.37 ppb650 to 2.2 ppb
2007-08-010 ppb110 ppb
2007-08-010 ppb110 ppb
2007-08-013 ppb540 to 15 ppb
2007-08-010 ppb110 ppb
2007-08-010 ppb220 ppb
2007-07-011.49 ppb750 to 6.2 ppb
2007-07-010 ppb990 ppb
2007-07-012 ppb540 to 10 ppb
2007-07-010 ppb220 ppb
2007-06-0111.67 ppb310 to 19 ppb
2007-06-011.34 ppb760 to 9.4 ppb
2007-06-010 ppb110 ppb
2007-06-010 ppb110 ppb
2007-06-010 ppb220 ppb
2007-05-010.13 ppb430 to 0.5 ppb
2007-05-010 ppb110 ppb
2007-05-010 ppb550 ppb
2007-04-012.08 ppb640 to 8.6 ppb
2007-04-010 ppb330 ppb
2007-04-010 ppb770 ppb
2007-03-010 ppb330 ppb
2007-03-010 ppb440 ppb
2007-03-010 ppb220 ppb
2007-02-010 ppb220 ppb
2007-01-018.6 ppb108.6 ppb
2007-01-010 ppb110 ppb
2006-08-014 ppb104 ppb
2006-05-010 ppb220 ppb
2006-04-011.6 ppb101.6 ppb
2006-04-015.4 ppb105.4 ppb
2006-03-010 ppb110 ppb
2006-01-0115 ppb1015 ppb
2006-01-015.3 ppb105.3 ppb