The Power of Information

National Drinking Water Database


WA of Western Nassau Utilities - Great Neck, NY


Serves 120,000 people

Trichloroethylene

Trichloroethylene is used to remove grease from fabricated metal parts and in the production of some textiles; this pollutant comes from metal degreasing sites, metal finishing and rubber processing industries.
 
This Drinking Water System
Test Days Exceeding Health GuidelinesDefinition of what this is
171 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)
46 days
Test DaysNumber of days in which this chemical has reported results in the data we received from the State
222 days
Tests ConductedNumber of individual tests done for this contaminant
837 tests

Testing Summary

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
TrichloroethyleneTrichloroethylene is used to remove grease from fabricated metal parts and in the production of some textiles; this pollutant comes from metal degreasing sites, metal finishing and rubber processing industries.1.99 ppb
13.49 ppb
Yes
MCLGA non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.: 0 ppb
Yes
5 ppb
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 Trichloroethylene

Health Based Limits for Trichloroethylene

StandardDescriptionLevel
Maximum Contaminant Limit Goal (MCLG)A non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.0 ppb
EPA Human Health Water Quality CriteriaWater quality criteria set by the US EPA provide guidance for states and tribes authorized to establish water quality standards under the Clean Water Act (CWA) to protect human health. These are non-enforceable standards based upon exposure by both drinking water and the contribution of water contamination to other consumed foods. Source: U.S. Environmental Protection Agency.0.03 ppb
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.1.7 ppb
One in one million (10-6) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 1,000,000. Source: U.S. Environmental Protection Agency.3 ppb
Maximum Contaminant Limit (MCL)The enforceable standard which defines the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to health-based limits (Maximum Contaminant Level Goals, or MCLGs) as feasible using the best available analytical and treatment technologies and taking cost into consideration. Source: U.S. Environmental Protection Agency.5 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.200 ppb
One in ten thousand (10-4) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 10,000. Source: U.S. Environmental Protection Agency.300 ppb

Testing Results

Testing DateAverage
Result
Samples taken that dayNumber of Non-DetectsRange of Results
2009-02-013.1 ppb210 to 6.2 ppb
2009-02-010 ppb110 ppb
2009-02-014.4 ppb104.4 ppb
2009-02-016.05 ppb201.5 to 10.6 ppb
2009-02-011.45 ppb210 to 2.9 ppb
2009-01-014.3 ppb104.3 ppb
2009-01-015.65 ppb201.3 to 10 ppb
2009-01-010 ppb220 ppb
2009-01-012.7 ppb102.7 ppb
2009-01-010 ppb110 ppb
2009-01-016.2 ppb106.2 ppb
2008-12-0122.34 ppb+530 to 108 ppb
2008-12-010.3 ppb210 to 0.6 ppb
2008-12-0120.1 ppb+420 to 71 ppb
2008-12-010.45 ppb420 to 1.2 ppb
2008-12-013.65 ppb200.6 to 6.7 ppb
2008-12-010.23 ppb320 to 0.7 ppb
2008-12-011.15 ppb210 to 2.3 ppb
2008-11-0125.15 ppb+420 to 100 ppb
2008-11-014.38 ppb420 to 14 ppb
2008-11-011.84 ppb520 to 7.6 ppb
2008-11-010.75 ppb210 to 1.5 ppb
2008-11-011.93 ppb410 to 6.6 ppb
2008-10-010 ppb220 ppb
2008-10-012.98 ppb420 to 10.5 ppb
2008-10-0121.35 ppb+430 to 85.4 ppb
2008-10-010.85 ppb430 to 3.4 ppb
2008-10-010.12 ppb540 to 0.6 ppb
2008-10-011.75 ppb420 to 6.5 ppb
2008-10-010 ppb220 ppb
2008-10-010.35 ppb210 to 0.7 ppb
2008-10-015.75 ppb203.2 to 8.3 ppb
2008-09-012.27 ppb640 to 11 ppb
2008-09-0142.3 ppb+210 to 84.6 ppb
2008-09-010.38 ppb430 to 1.5 ppb
2008-09-011.8 ppb320 to 5.4 ppb
2008-09-010 ppb220 ppb
2008-09-013.85 ppb200.6 to 7.1 ppb
2008-08-011.27 ppb640 to 5.2 ppb
2008-08-0141.5 ppb+200.6 to 82.4 ppb
2008-08-012.83 ppb300.6 to 4.1 ppb
2008-08-012.42 ppb520 to 5.2 ppb
2008-08-012.53 ppb430 to 10.1 ppb
2008-08-011.9 ppb210 to 3.8 ppb
2008-08-012.8 ppb210 to 5.6 ppb
2008-08-010 ppb220 ppb
2008-07-010.6 ppb100.6 ppb
2008-07-011.2 ppb420 to 2.5 ppb
2008-07-012.64 ppb530 to 10.6 ppb
2008-07-011.1 ppb101.1 ppb
2008-07-010.38 ppb430 to 1.5 ppb
2008-07-012.6 ppb202.6 ppb
2008-07-010 ppb220 ppb
2008-07-0120.3 ppb+420 to 80.6 ppb
2008-07-012.45 ppb210 to 4.9 ppb
2008-07-013.3 ppb203.3 ppb
2008-07-012.7 ppb510 to 6 ppb
2008-07-010 ppb550 ppb
2008-06-012.8 ppb102.8 ppb
2008-06-010 ppb220 ppb
2008-06-0133.03 ppb+300.7 to 95.4 ppb
2008-06-010.98 ppb530 to 3.6 ppb
2008-06-014.17 ppb310 to 11.6 ppb
2008-06-010 ppb220 ppb
2008-06-010.61 ppb750 to 2.2 ppb
2008-06-012.5 ppb410 to 4.9 ppb
2008-05-0118.8 ppb+530 to 82.5 ppb
2008-05-012.5 ppb202.5 ppb
2008-05-010.6 ppb640 to 2.3 ppb
2008-05-013.28 ppb410 to 8.1 ppb
2008-05-011.05 ppb210 to 2.1 ppb
2008-05-013.05 ppb203 to 3.1 ppb
2008-05-010 ppb660 ppb
2008-05-011.87 ppb310 to 3 ppb
2008-04-012.5 ppb320 to 7.5 ppb
2008-04-0133.24 ppb+510 to 103 ppb
2008-04-012.45 ppb202.3 to 2.6 ppb
2008-04-010.63 ppb420 to 1.6 ppb
2008-04-010.7 ppb640 to 2.2 ppb
2008-04-012.45 ppb202.4 to 2.5 ppb
2008-04-011.07 ppb640 to 3.3 ppb
2008-03-0110.57 ppb960 to 80 ppb
2008-03-011.53 ppb410 to 2.5 ppb
2008-03-013.2 ppb203.1 to 3.3 ppb
2008-03-012.6 ppb202.5 to 2.7 ppb
2008-03-010 ppb330 ppb
2008-03-011.88 ppb630 to 4.9 ppb
2008-03-010 ppb220 ppb
2008-02-010 ppb440 ppb
2008-02-011.8 ppb520 to 3 ppb
2008-02-010.28 ppb430 to 1.1 ppb
2008-02-0112.69 ppb740 to 77.2 ppb
2008-02-012.35 ppb202.3 to 2.4 ppb
2008-02-011.77 ppb630 to 4.9 ppb
2008-02-013.65 ppb203.3 to 4 ppb
2008-01-011.82 ppb540 to 9.1 ppb
2008-01-0137.38 ppb+510 to 114 ppb
2008-01-010.83 ppb420 to 2 ppb
2008-01-010 ppb440 ppb
2008-01-010.96 ppb530 to 2.4 ppb
2008-01-011.68 ppb620 to 5.2 ppb
2008-01-010 ppb220 ppb
2008-01-010 ppb220 ppb
2008-01-010 ppb220 ppb
2007-12-0115.72 ppb+530 to 77.9 ppb
2007-12-011.73 ppb310 to 2.6 ppb
2007-12-010 ppb110 ppb
2007-12-010.05 ppb100.05 ppb
2007-12-010 ppb110 ppb
2007-12-011.95 ppb201.8 to 2.1 ppb
2007-12-010.28 ppb540 to 1.4 ppb
2007-12-012.44 ppb530 to 9.9 ppb
2007-11-010 ppb110 ppb
2007-11-017.63 ppb1170 to 70.4 ppb
2007-11-010 ppb440 ppb
2007-11-011 ppb530 to 3.9 ppb
2007-11-010.58 ppb430 to 2.3 ppb
2007-11-012.1 ppb410 to 4.4 ppb
2007-11-010 ppb330 ppb
2007-11-011.1 ppb420 to 2.4 ppb
2007-11-010.55 ppb430 to 2.2 ppb
2007-11-012 ppb102 ppb
2007-10-010.4 ppb320 to 1.2 ppb
2007-10-010.63 ppb430 to 2.5 ppb
2007-10-0124.58 ppb+401.1 to 93 ppb
2007-10-013.16 ppb530 to 14.7 ppb
2007-10-015.2 ppb204.5 to 5.9 ppb
2007-10-010 ppb220 ppb
2007-10-010 ppb220 ppb
2007-10-011.95 ppb210 to 3.9 ppb
2007-09-010.7 ppb210 to 1.4 ppb
2007-09-0125.5 ppb+400.9 to 96 ppb
2007-09-010.5 ppb100.5 ppb
2007-09-011.55 ppb210 to 3.1 ppb
2007-09-015.4 ppb210 to 10.8 ppb
2007-09-012 ppb202 ppb
2007-09-010.94 ppb530 to 2.4 ppb
2007-09-011.67 ppb310 to 4.4 ppb
2007-08-011.44 ppb720 to 2.4 ppb
2007-08-011.7 ppb201.6 to 1.8 ppb
2007-08-0141.7 ppb+200.6 to 82.8 ppb
2007-08-014.53 ppb410 to 13.5 ppb
2007-08-010 ppb440 ppb
2007-08-012.4 ppb202.4 ppb
2007-08-011.87 ppb310 to 4.8 ppb
2007-08-012.5 ppb202.4 to 2.6 ppb
2007-07-0117 ppb+620 to 97.2 ppb
2007-07-010 ppb880 ppb
2007-07-013.3 ppb520 to 13 ppb
2007-07-012.13 ppb320 to 6.4 ppb
2007-07-010 ppb220 ppb
2007-06-010 ppb220 ppb
2007-06-011.87 ppb320 to 5.6 ppb
2007-06-012.43 ppb740 to 12.6 ppb
2007-06-0124.8 ppb+400.7 to 94.9 ppb
2007-05-010 ppb220 ppb
2007-05-0116.1 ppb+1050 to 83.3 ppb
2007-05-010 ppb110 ppb
2007-05-012.6 ppb102.6 ppb
2007-05-011.8 ppb320 to 5.4 ppb
2007-04-0141.3 ppb+210 to 82.6 ppb
2007-04-011.94 ppb950 to 9.2 ppb
2007-04-010 ppb660 ppb
2007-04-010 ppb220 ppb
2007-04-010 ppb110 ppb
2007-04-010 ppb220 ppb
2007-03-012.54 ppb520 to 7.7 ppb
2007-03-012.08 ppb850 to 13.3 ppb
2007-03-010 ppb110 ppb
2007-03-010 ppb220 ppb
2007-02-012.8 ppb102.8 ppb
2007-02-011.03 ppb420 to 2.1 ppb
2007-02-0113.04 ppb940 to 99.4 ppb
2007-01-010 ppb220 ppb
2007-01-019.39 ppb1170 to 89.3 ppb
2007-01-010.65 ppb420 to 1.3 ppb
2007-01-010 ppb220 ppb
2007-01-010 ppb110 ppb
2006-12-010.67 ppb630 to 1.5 ppb
2006-12-0126.15 ppb+840 to 105 ppb
2006-11-018.6 ppb1180 to 82.9 ppb
2006-11-010.75 ppb420 to 1.6 ppb
2006-11-010.43 ppb750 to 2.2 ppb
2006-11-0152 ppb+210 to 104 ppb
2006-10-010 ppb220 ppb
2006-10-010.36 ppb1070 to 1.3 ppb
2006-10-0126.7 ppb+840 to 103 ppb
2006-09-0122.22 ppb+1050 to 112 ppb
2006-09-010 ppb440 ppb
2006-09-011.5 ppb320 to 4.5 ppb
2006-08-010 ppb220 ppb
2006-08-010 ppb220 ppb
2006-08-010 ppb220 ppb
2006-08-010.62 ppb520 to 1.1 ppb
2006-08-0120.3 ppb+1050 to 92 ppb
2006-07-010 ppb220 ppb
2006-07-010 ppb220 ppb
2006-07-011.59 ppb1390 to 12 ppb
2006-07-011.13 ppb420 to 3.2 ppb
2006-07-0126.86 ppb+750 to 97 ppb
2006-06-0144.27 ppb+200.54 to 88 ppb
2006-06-013.15 ppb210 to 6.3 ppb
2006-06-010.29 ppb750 to 1.1 ppb
2006-06-012.43 ppb860 to 9.7 ppb
2006-06-0111.27 ppb620 to 64 ppb
2006-05-0116.42 ppb+520 to 79 ppb
2006-05-011.51 ppb850 to 10 ppb
2006-05-010.37 ppb320 to 1.1 ppb
2006-04-010 ppb220 ppb
2006-04-0111 ppb1090 to 110 ppb
2006-04-0113.49 ppb940 to 100 ppb
2006-03-010 ppb330 ppb
2006-03-013.33 ppb320 to 10 ppb
2006-03-010 ppb110 ppb
2006-03-017.6 ppb107.6 ppb
2006-03-0112.98 ppb640 to 77 ppb
2006-02-010.75 ppb210 to 1.5 ppb
2006-02-0121.25 ppb+430 to 85 ppb
2006-02-011.45 ppb650 to 8.7 ppb
2006-01-0110.49 ppb850 to 74 ppb
2006-01-010.6 ppb320 to 1.8 ppb
2006-01-011.28 ppb420 to 4.6 ppb