The Power of Information

National Drinking Water Database

City of Modesto Utilities - Modesto, CA

Serves 190,106 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
51 days
Tests ConductedNumber of individual tests done for this contaminant
64 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
2008-12-160 ppb110 ppb
2008-08-120 ppb110 ppb
2008-05-060 ppb110 ppb
2008-04-280 ppb110 ppb
2008-04-220 ppb110 ppb
2008-04-170 ppb110 ppb
2008-04-150 ppb110 ppb
2008-03-270 ppb110 ppb
2007-04-230 ppb110 ppb
2007-04-190 ppb110 ppb
2007-04-170 ppb110 ppb
2007-04-040 ppb110 ppb
2007-04-020 ppb110 ppb
2006-12-070 ppb110 ppb
2006-08-230 ppb110 ppb
2006-07-180 ppb110 ppb
2006-07-110 ppb110 ppb
2006-06-280 ppb110 ppb
2006-06-270 ppb110 ppb
2006-06-070 ppb110 ppb
2006-05-080 ppb110 ppb
2006-05-030 ppb110 ppb
2006-04-110 ppb110 ppb
2006-04-050 ppb220 ppb
2006-03-150 ppb110 ppb
2006-03-080 ppb110 ppb
2006-03-070 ppb110 ppb
2006-03-020 ppb110 ppb
2006-02-220 ppb110 ppb
2006-02-150 ppb220 ppb
2006-02-140 ppb220 ppb
2006-02-080 ppb330 ppb
2006-02-070 ppb330 ppb
2006-02-010 ppb110 ppb
2005-12-130 ppb110 ppb
2005-10-190 ppb110 ppb
2005-09-010 ppb110 ppb
2005-07-010 ppb110 ppb
2005-06-220 ppb110 ppb
2005-06-210 ppb220 ppb
2005-06-150 ppb220 ppb
2005-03-100 ppb220 ppb
2005-02-100 ppb220 ppb
2005-02-030 ppb220 ppb
2004-11-180 ppb110 ppb
2004-07-080 ppb220 ppb
2004-06-100 ppb110 ppb
2004-06-070 ppb110 ppb
2004-05-060 ppb110 ppb
2004-04-290 ppb110 ppb
2004-01-080 ppb110 ppb