The Power of Information

National Drinking Water Database

City of Watsonville Utilities - Santa Cruz, CA

Serves 62,000 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
14 days
Tests ConductedNumber of individual tests done for this contaminant
58 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
2008-02-110 ppb440 ppb
2007-04-090 ppb770 ppb
2007-02-120 ppb110 ppb
2006-09-190 ppb110 ppb
2006-02-060 ppb110 ppb
2005-09-300 ppb220 ppb
2005-08-130 ppb330 ppb
2005-06-200 ppb110 ppb
2005-05-160 ppb880 ppb
2005-01-250 ppb550 ppb
2004-12-070 ppb770 ppb
2004-11-220 ppb330 ppb
2004-11-020 ppb440 ppb
2004-06-280 ppb11110 ppb