The Power of Information

National Drinking Water Database

San Jose Water Company Utilities - San Jose, CA

Serves 979,000 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
31 days
Tests ConductedNumber of individual tests done for this contaminant
96 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
2009-02-250 ppb110 ppb
2008-12-150 ppb220 ppb
2008-12-040 ppb110 ppb
2008-12-030 ppb220 ppb
2008-09-220 ppb330 ppb
2008-07-020 ppb220 ppb
2008-06-250 ppb220 ppb
2008-06-240 ppb220 ppb
2008-06-230 ppb440 ppb
2008-06-180 ppb110 ppb
2008-06-170 ppb660 ppb
2008-06-120 ppb550 ppb
2008-06-100 ppb330 ppb
2008-06-020 ppb110 ppb
2008-05-290 ppb880 ppb
2008-05-270 ppb220 ppb
2008-05-200 ppb440 ppb
2008-05-190 ppb440 ppb
2008-05-130 ppb880 ppb
2008-05-070 ppb220 ppb
2008-05-060 ppb220 ppb
2008-05-050 ppb110 ppb
2008-04-300 ppb550 ppb
2008-04-280 ppb660 ppb
2008-04-230 ppb660 ppb
2008-04-220 ppb880 ppb
2008-03-270 ppb110 ppb
2007-04-190 ppb110 ppb
2007-03-280 ppb110 ppb
2007-03-050 ppb110 ppb
2007-01-300 ppb110 ppb