The Power of Information

National Drinking Water Database


Hicksville Wd Utilities - Great Neck, NY


Serves 47,810 people

Perchlorate

Perchlorate is a synthetic oxygen additive in solid fuel propellant for rockets, missiles, and fireworks, and is primarily used by the military and the space industry; it may occur naturally in certain imported agricultural fertilizers.
 
This Drinking Water System
Test Days Exceeding Health GuidelinesDefinition of what this is
7 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
141 days
Tests ConductedNumber of individual tests done for this contaminant
444 tests

Testing Summary

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
PerchloratePerchlorate is a synthetic oxygen additive in solid fuel propellant for rockets, missiles, and fireworks, and is primarily used by the military and the space industry; it may occur naturally in certain imported agricultural fertilizers.2.53 ppb
12.8 ppb
Yes
5 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 Perchlorate

Health Based Limits for Perchlorate

StandardDescriptionLevel
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.5 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.6 ppb

Testing Results

Testing DateAverage
Result
Samples taken that dayNumber of Non-DetectsRange of Results
2009-03-011.93 ppb301.5 to 2.4 ppb
2009-03-011.03 ppb310 to 2 ppb
2009-03-019.1 ppb109.1 ppb
2009-03-011.15 ppb201.1 to 1.2 ppb
2009-03-013.85 ppb203.8 to 3.9 ppb
2009-03-012.1 ppb202 to 2.2 ppb
2009-03-010 ppb110 ppb
2009-02-011.83 ppb301.4 to 2.4 ppb
2009-02-012.18 ppb410 to 3.7 ppb
2009-02-011.77 ppb301.1 to 3 ppb
2009-02-012.1 ppb202 to 2.2 ppb
2009-02-013.77 ppb320 to 11.3 ppb
2009-02-012.48 ppb401 to 3.7 ppb
2009-01-011.15 ppb201.1 to 1.2 ppb
2009-01-013.02 ppb910 to 12.9 ppb
2009-01-012.43 ppb410 to 4 ppb
2008-12-011.6 ppb501.1 to 2.4 ppb
2008-12-012.04 ppb510 to 5.9 ppb
2008-12-012.3 ppb301.8 to 2.9 ppb
2008-12-012.4 ppb310 to 3.8 ppb
2008-11-011.8 ppb101.8 ppb
2008-11-010.37 ppb320 to 1.1 ppb
2008-11-012.57 ppb601.5 to 5.5 ppb
2008-11-012.26 ppb501 to 3.7 ppb
2008-10-013.38 ppb610 to 10.5 ppb
2008-10-011.93 ppb601.5 to 2.7 ppb
2008-10-010.55 ppb210 to 1.1 ppb
2008-09-014.48 ppb401 to 11.6 ppb
2008-09-010.6 ppb210 to 1.2 ppb
2008-09-013.7 ppb203.7 ppb
2008-09-012.8 ppb102.8 ppb
2008-09-011.9 ppb201.8 to 2 ppb
2008-09-011.27 ppb310 to 2.2 ppb
2008-09-010 ppb110 ppb
2008-08-012.84 ppb801.4 to 8.8 ppb
2008-08-011.2 ppb740 to 3.5 ppb
2008-07-012.68 ppb620 to 11.1 ppb
2008-07-011.94 ppb501.4 to 2.8 ppb
2008-07-011.68 ppb420 to 3.4 ppb
2008-07-013.6 ppb103.6 ppb
2008-06-011.8 ppb210 to 3.6 ppb
2008-06-012.43 ppb301.3 to 3.6 ppb
2008-06-011.95 ppb201.9 to 2 ppb
2008-06-015.7 ppb301.7 to 12.6 ppb
2008-06-010.55 ppb210 to 1.1 ppb
2008-05-014.3 ppb601.4 to 12.4 ppb
2008-05-011.6 ppb401 to 2 ppb
2008-05-011.1 ppb201 to 1.2 ppb
2008-05-012 ppb201.7 to 2.3 ppb
2008-04-011 ppb210 to 2 ppb
2008-04-012.5 ppb810 to 11.6 ppb
2008-04-012.6 ppb510 to 5.5 ppb
2008-03-0112.8 ppb1012.8 ppb
2008-03-011.15 ppb201.1 to 1.2 ppb
2008-03-012.25 ppb410 to 3.7 ppb
2008-03-011.55 ppb201.1 to 2 ppb
2008-03-011.97 ppb301.5 to 2.8 ppb
2008-03-012.6 ppb102.6 ppb
2008-02-011.52 ppb501.1 to 2.2 ppb
2008-02-013.63 ppb303.4 to 3.9 ppb
2008-02-015.07 ppb301.5 to 11.9 ppb
2008-02-011.3 ppb410 to 2 ppb
2008-01-014.47 ppb310 to 11.7 ppb
2008-01-012.4 ppb302.1 to 3 ppb
2008-01-012.58 ppb501.1 to 4 ppb
2008-01-011.95 ppb201.6 to 2.3 ppb
2007-12-013.2 ppb301.5 to 6.5 ppb
2007-12-011.95 ppb201.9 to 2 ppb
2007-12-011.83 ppb301.1 to 3.2 ppb
2007-12-013.9 ppb203.4 to 4.4 ppb
2007-12-011.3 ppb410 to 1.9 ppb
2007-11-011.25 ppb201.2 to 1.3 ppb
2007-11-014.4 ppb203.5 to 5.3 ppb
2007-11-013 ppb103 ppb
2007-11-011.9 ppb501.2 to 2.6 ppb
2007-11-016.03 ppb310 to 14.5 ppb
2007-10-013.85 ppb203 to 4.7 ppb
2007-10-011.6 ppb301 to 2.7 ppb
2007-10-013.5 ppb510 to 11.4 ppb
2007-09-011.85 ppb210 to 3.7 ppb
2007-09-0111.7 ppb1011.7 ppb
2007-09-012 ppb301.7 to 2.5 ppb
2007-09-011.33 ppb401 to 1.6 ppb
2007-09-011.6 ppb301.4 to 2 ppb
2007-08-013.5 ppb510 to 10.9 ppb
2007-08-012.2 ppb610 to 3.7 ppb
2007-07-012.7 ppb102.7 ppb
2007-07-014.87 ppb301.8 to 11 ppb
2007-07-012.4 ppb501.1 to 4.9 ppb
2007-07-010 ppb110 ppb
2007-06-011.9 ppb201.8 to 2 ppb
2007-06-011.15 ppb201.1 to 1.2 ppb
2007-06-012.67 ppb610 to 4.6 ppb
2007-05-013.44 ppb510 to 8.8 ppb
2007-05-011 ppb210 to 2 ppb
2007-05-011.6 ppb410 to 3.9 ppb
2007-04-012.05 ppb201.2 to 2.9 ppb
2007-04-012.55 ppb410 to 4.8 ppb
2007-04-014.6 ppb310 to 11.7 ppb
2007-03-014.23 ppb601.2 to 10.9 ppb
2007-03-011.1 ppb101.1 ppb
2007-03-011.1 ppb210 to 2.2 ppb
2007-02-011.45 ppb201.1 to 1.8 ppb
2007-02-012.07 ppb620 to 4.6 ppb
2007-01-012.22 ppb610 to 4.3 ppb
2007-01-010 ppb110 ppb
2006-12-010 ppb110 ppb
2006-12-012.72 ppb510 to 5.6 ppb
2006-12-014.05 ppb410 to 12.1 ppb
2006-11-012.74 ppb710 to 6.2 ppb
2006-11-011.6 ppb310 to 3.1 ppb
2006-10-012.2 ppb201.1 to 3.3 ppb
2006-10-012.41 ppb710 to 6.4 ppb
2006-09-013.57 ppb301 to 7.4 ppb
2006-09-013.6 ppb103.6 ppb
2006-09-013.9 ppb302 to 7.6 ppb
2006-09-012.05 ppb201.1 to 3 ppb
2006-08-011.85 ppb201.8 to 1.9 ppb
2006-08-012.6 ppb201 to 4.2 ppb
2006-08-012.8 ppb102.8 ppb
2006-08-011.1 ppb210 to 2.2 ppb
2006-07-012.55 ppb201.8 to 3.3 ppb
2006-07-011.55 ppb410 to 2.6 ppb
2006-07-011.85 ppb201 to 2.7 ppb
2006-06-014 ppb104 ppb
2006-06-011.73 ppb820 to 4.1 ppb
2006-06-013.1 ppb103.1 ppb
2006-05-011.9 ppb201.8 to 2 ppb
2006-05-017.7 ppb107.7 ppb
2006-05-011.03 ppb420 to 2.2 ppb
2006-05-012.9 ppb102.9 ppb
2006-05-011.25 ppb201.1 to 1.4 ppb
2006-05-014.1 ppb104.1 ppb
2006-05-011.83 ppb301.6 to 2.3 ppb
2006-04-010.88 ppb410 to 1.3 ppb
2006-04-012.63 ppb301.9 to 4 ppb
2006-03-011.48 ppb410 to 2.2 ppb
2006-03-011.9 ppb301.1 to 3.2 ppb
2006-03-012 ppb301.7 to 2.4 ppb
2006-03-013.03 ppb310 to 7.5 ppb
2006-03-014 ppb104 ppb