The Power of Information

National Drinking Water Database

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

Serves 661,004 people


Butachlor is an herbicide for rice and is used to control annual grasses and broadleaf weeds.
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
70 days
Tests ConductedNumber of individual tests done for this contaminant
258 tests

Testing Summary

Health Limit
Legal Limit

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
ButachlorButachlor is an herbicide for rice and is used to control annual grasses and broadleaf weeds.0 ppb
0 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 Butachlor

Health Based Limits for Butachlor

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
2009-06-020 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
2009-02-260 ppb330 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 ppb220 ppb
2007-10-150 ppb220 ppb
2007-10-110 ppb660 ppb
2007-10-090 ppb220 ppb
2007-10-040 ppb220 ppb
2007-10-020 ppb440 ppb
2007-10-010 ppb10100 ppb
2007-08-220 ppb220 ppb
2007-08-150 ppb220 ppb
2007-07-130 ppb12120 ppb
2007-07-120 ppb440 ppb
2007-07-090 ppb880 ppb
2007-07-030 ppb220 ppb
2007-06-040 ppb440 ppb
2007-06-010 ppb220 ppb
2007-05-030 ppb220 ppb
2007-04-230 ppb220 ppb
2007-04-190 ppb10100 ppb
2007-04-110 ppb10100 ppb
2007-04-040 ppb220 ppb
2007-03-200 ppb220 ppb
2007-03-080 ppb10100 ppb
2007-03-020 ppb220 ppb
2007-01-310 ppb220 ppb
2007-01-300 ppb220 ppb
2007-01-260 ppb660 ppb
2007-01-250 ppb12120 ppb
2007-01-240 ppb10100 ppb