The Power of Information

National Drinking Water Database

Waipahu-Ewa-Waianae Utilities - Honolulu, HI

Serves 170,921 people


Carbofuran is a highly toxic insecticide and soil fumigant that had been used on corn, rice and alfalfa; it poses severe risks to children (via diet), agricultural workers and the environment.
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
57 days
Tests ConductedNumber of individual tests done for this contaminant
172 tests

Testing Summary

Health Limit
Legal Limit

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
CarbofuranCarbofuran is a highly toxic insecticide and soil fumigant that had been used on corn, rice and alfalfa; it poses severe risks to children (via diet), agricultural workers and the environment.0 ppb
0 ppb
1.7 ppb
40 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 Carbofuran

Health Based Limits for Carbofuran

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
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.40 ppb
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.40 ppb

Testing Results

Testing DateAverage
Samples taken that dayNumber of Non-DetectsRange of Results
2009-06-020 ppb110 ppb
2009-03-110 ppb660 ppb
2009-03-100 ppb440 ppb
2008-09-180 ppb440 ppb
2008-09-170 ppb220 ppb
2008-09-030 ppb110 ppb
2008-08-080 ppb110 ppb
2008-07-220 ppb11110 ppb
2008-06-160 ppb110 ppb
2008-05-210 ppb110 ppb
2008-05-090 ppb440 ppb
2008-05-070 ppb220 ppb
2008-05-060 ppb990 ppb
2008-05-050 ppb550 ppb
2008-02-250 ppb550 ppb
2008-02-110 ppb660 ppb
2007-04-230 ppb660 ppb
2007-04-050 ppb660 ppb
2007-04-040 ppb330 ppb
2007-03-090 ppb330 ppb
2007-01-290 ppb330 ppb
2007-01-220 ppb330 ppb
2006-06-280 ppb440 ppb
2006-06-060 ppb220 ppb
2006-05-020 ppb660 ppb
2006-04-250 ppb110 ppb
2006-04-040 ppb110 ppb
2005-12-150 ppb110 ppb
2005-12-060 ppb110 ppb
2005-11-290 ppb330 ppb
2005-11-280 ppb110 ppb
2005-11-170 ppb110 ppb
2005-10-270 ppb110 ppb
2005-10-140 ppb440 ppb
2005-10-070 ppb550 ppb
2005-09-230 ppb660 ppb
2005-09-220 ppb440 ppb
2005-08-230 ppb110 ppb
2005-08-090 ppb440 ppb
2005-07-190 ppb660 ppb
2004-12-170 ppb220 ppb
2004-12-160 ppb220 ppb
2004-12-090 ppb330 ppb
2004-12-070 ppb440 ppb
2004-12-010 ppb110 ppb
2004-10-130 ppb110 ppb
2004-08-190 ppb110 ppb
2004-08-180 ppb10100 ppb
2004-08-120 ppb110 ppb
2004-08-020 ppb110 ppb
2004-07-280 ppb110 ppb
2004-05-250 ppb110 ppb
2004-05-060 ppb110 ppb
2004-04-220 ppb110 ppb
2004-03-180 ppb110 ppb
2004-03-020 ppb110 ppb
2004-02-030 ppb110 ppb