The Power of Information

National Drinking Water Database

Waipahu-Ewa-Waianae Utilities - Honolulu, HI

Serves 170,921 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
45 days
Tests ConductedNumber of individual tests done for this contaminant
203 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 ppb110 ppb
2009-04-280 ppb110 ppb
2009-04-150 ppb330 ppb
2009-03-110 ppb660 ppb
2009-03-100 ppb330 ppb
2009-03-060 ppb110 ppb
2009-02-110 ppb220 ppb
2008-10-060 ppb220 ppb
2008-09-180 ppb440 ppb
2008-09-170 ppb220 ppb
2008-09-030 ppb110 ppb
2008-08-080 ppb330 ppb
2008-07-220 ppb11110 ppb
2008-06-160 ppb110 ppb
2008-05-220 ppb330 ppb
2008-05-210 ppb110 ppb
2008-05-070 ppb220 ppb
2008-05-060 ppb10100 ppb
2008-05-050 ppb330 ppb
2008-04-020 ppb110 ppb
2008-04-010 ppb660 ppb
2008-03-240 ppb13130 ppb
2008-02-250 ppb880 ppb
2008-02-210 ppb220 ppb
2008-02-200 ppb550 ppb
2007-10-170 ppb220 ppb
2007-10-110 ppb440 ppb
2007-10-040 ppb660 ppb
2007-10-030 ppb10100 ppb
2007-10-020 ppb880 ppb
2007-07-050 ppb880 ppb
2007-07-030 ppb220 ppb
2007-07-020 ppb10100 ppb
2007-06-010 ppb220 ppb
2007-05-040 ppb660 ppb
2007-04-230 ppb440 ppb
2007-04-120 ppb220 ppb
2007-04-100 ppb12120 ppb
2007-04-040 ppb220 ppb
2007-03-090 ppb220 ppb
2007-02-230 ppb16160 ppb
2007-01-300 ppb220 ppb
2007-01-290 ppb220 ppb
2007-01-260 ppb660 ppb
2007-01-230 ppb220 ppb