The Power of Information

National Drinking Water Database

Board of Water Supply (Honolulu/Windward/Pearl Harbor) Utilities - Honolulu, HI

Serves 661,004 people


Simazine is a widely used herbicide that has been associated with endocrine disruption and cancer in experimental studies.
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
171 days
Tests ConductedNumber of individual tests done for this contaminant
653 tests

Testing Summary

Health Limit
Legal Limit

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
SimazineSimazine is a widely used herbicide that has been associated with endocrine disruption and cancer in experimental studies.0 ppb
0 ppb
4 ppb
4 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 Simazine

Health Based Limits for Simazine

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.4 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.4 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.4 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.700 ppb

Testing Results

Testing DateAverage
Samples taken that dayNumber of Non-DetectsRange of Results
2009-06-020 ppb220 ppb
2009-06-010 ppb660 ppb
2009-05-280 ppb330 ppb
2009-05-270 ppb110 ppb
2009-05-120 ppb550 ppb
2009-04-300 ppb110 ppb
2009-04-290 ppb330 ppb
2009-04-170 ppb110 ppb
2009-04-140 ppb440 ppb
2009-03-240 ppb660 ppb
2009-02-190 ppb110 ppb
2009-02-180 ppb110 ppb
2009-02-110 ppb110 ppb
2009-02-100 ppb110 ppb
2009-02-090 ppb440 ppb
2009-01-260 ppb110 ppb
2008-11-190 ppb110 ppb
2008-10-280 ppb330 ppb
2008-10-230 ppb110 ppb
2008-10-090 ppb110 ppb
2008-10-070 ppb550 ppb
2008-09-170 ppb440 ppb
2008-09-160 ppb110 ppb
2008-09-030 ppb660 ppb
2008-09-020 ppb440 ppb
2008-08-110 ppb220 ppb
2008-07-160 ppb660 ppb
2008-07-150 ppb660 ppb
2008-06-170 ppb110 ppb
2008-06-050 ppb220 ppb
2008-06-040 ppb330 ppb
2008-06-030 ppb770 ppb
2008-06-020 ppb440 ppb
2008-04-080 ppb110 ppb
2008-04-040 ppb220 ppb
2008-04-010 ppb880 ppb
2008-03-120 ppb110 ppb
2008-02-270 ppb110 ppb
2008-02-260 ppb220 ppb
2008-02-200 ppb220 ppb
2008-02-190 ppb440 ppb
2007-11-290 ppb330 ppb
2007-10-150 ppb330 ppb
2007-10-110 ppb990 ppb
2007-10-090 ppb330 ppb
2007-10-040 ppb330 ppb
2007-10-020 ppb660 ppb
2007-10-010 ppb15150 ppb
2007-08-220 ppb330 ppb
2007-08-150 ppb330 ppb
2007-07-130 ppb18180 ppb
2007-07-120 ppb660 ppb
2007-07-090 ppb12120 ppb
2007-07-030 ppb330 ppb
2007-06-040 ppb660 ppb
2007-06-010 ppb330 ppb
2007-05-030 ppb330 ppb
2007-04-230 ppb330 ppb
2007-04-190 ppb15150 ppb
2007-04-110 ppb15150 ppb
2007-04-040 ppb330 ppb
2007-03-200 ppb330 ppb
2007-03-080 ppb15150 ppb
2007-03-020 ppb330 ppb
2007-01-310 ppb330 ppb
2007-01-300 ppb330 ppb
2007-01-260 ppb990 ppb
2007-01-250 ppb18180 ppb
2007-01-240 ppb15150 ppb
2006-12-120 ppb220 ppb
2006-12-010 ppb110 ppb
2006-11-280 ppb110 ppb
2006-11-200 ppb110 ppb
2006-11-150 ppb770 ppb
2006-11-010 ppb330 ppb
2006-10-310 ppb220 ppb
2006-10-270 ppb110 ppb
2006-09-220 ppb440 ppb
2006-09-180 ppb220 ppb
2006-09-080 ppb330 ppb
2006-09-060 ppb330 ppb
2006-08-290 ppb440 ppb
2006-08-220 ppb330 ppb
2006-08-140 ppb550 ppb
2006-08-110 ppb440 ppb
2006-08-090 ppb110 ppb
2006-08-080 ppb110 ppb
2006-07-280 ppb220 ppb
2006-07-260 ppb220 ppb
2006-07-200 ppb440 ppb
2006-06-270 ppb220 ppb
2006-06-210 ppb440 ppb
2006-06-200 ppb110 ppb
2006-06-190 ppb330 ppb
2006-06-070 ppb220 ppb
2006-05-260 ppb550 ppb
2006-05-240 ppb330 ppb
2006-05-220 ppb550 ppb
2006-05-150 ppb110 ppb
2006-05-010 ppb660 ppb
2006-04-060 ppb220 ppb
2006-04-040 ppb220 ppb
2006-03-160 ppb220 ppb
2006-03-140 ppb550 ppb
2006-03-130 ppb660 ppb
2006-03-020 ppb110 ppb
2006-03-010 ppb220 ppb
2006-02-280 ppb880 ppb
2005-11-150 ppb110 ppb
2005-11-140 ppb220 ppb
2005-11-090 ppb660 ppb
2005-11-070 ppb110 ppb
2005-10-260 ppb220 ppb
2005-09-300 ppb220 ppb
2005-09-270 ppb330 ppb
2005-09-260 ppb550 ppb
2005-09-200 ppb220 ppb
2005-09-190 ppb330 ppb
2005-08-250 ppb660 ppb
2005-08-240 ppb110 ppb
2005-08-170 ppb550 ppb
2005-07-250 ppb330 ppb
2005-07-070 ppb660 ppb
2005-06-300 ppb110 ppb
2005-06-290 ppb330 ppb
2005-06-280 ppb110 ppb
2005-06-270 ppb550 ppb
2005-06-230 ppb330 ppb
2005-06-080 ppb220 ppb
2005-06-040 ppb110 ppb
2005-06-030 ppb330 ppb
2005-06-020 ppb550 ppb
2005-06-010 ppb440 ppb
2005-05-190 ppb220 ppb
2005-05-170 ppb880 ppb
2005-04-180 ppb110 ppb
2005-02-150 ppb660 ppb
2005-02-140 ppb550 ppb
2004-12-160 ppb110 ppb
2004-12-080 ppb220 ppb
2004-12-070 ppb110 ppb
2004-12-030 ppb110 ppb
2004-11-030 ppb220 ppb
2004-10-280 ppb440 ppb
2004-10-180 ppb110 ppb
2004-10-080 ppb220 ppb
2004-10-060 ppb660 ppb
2004-09-300 ppb110 ppb
2004-09-290 ppb220 ppb
2004-09-280 ppb440 ppb
2004-09-230 ppb440 ppb
2004-09-220 ppb220 ppb
2004-09-210 ppb330 ppb
2004-09-160 ppb660 ppb
2004-09-080 ppb550 ppb
2004-09-070 ppb550 ppb
2004-08-190 ppb990 ppb
2004-08-170 ppb330 ppb
2004-08-110 ppb550 ppb
2004-08-030 ppb110 ppb
2004-07-220 ppb660 ppb
2004-07-210 ppb220 ppb
2004-07-120 ppb660 ppb
2004-07-070 ppb440 ppb
2004-07-060 ppb550 ppb
2004-04-070 ppb110 ppb
2004-04-020 ppb220 ppb
2004-04-010 ppb770 ppb
2004-02-190 ppb220 ppb
2004-02-130 ppb660 ppb
2004-02-120 ppb550 ppb