The Power of Information

National Drinking Water Database

Great Oaks Wc, Inc. Utilities - San Jose, CA

Serves 69,787 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
12 days
Tests ConductedNumber of individual tests done for this contaminant
26 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
2008-10-160 ppb110 ppb
2008-09-110 ppb110 ppb
2008-08-270 ppb220 ppb
2008-06-040 ppb110 ppb
2007-09-170 ppb110 ppb
2007-06-210 ppb13130 ppb
2007-02-050 ppb110 ppb
2006-03-150 ppb220 ppb
2005-12-290 ppb110 ppb
2005-10-310 ppb110 ppb
2005-09-300 ppb110 ppb
2004-08-050 ppb110 ppb