The Power of Information

National Drinking Water Database


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


Serves 69,787 people

Dibromomethane

Dibromomethane is an unregulated byproduct of tap water disinfection and a manufactured chemical used in chemical synthesis and as an ingredient in fire extinguishing fluids.
 
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
35 days
Tests ConductedNumber of individual tests done for this contaminant
71 tests

Testing Summary

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
DibromomethaneDibromomethane is an unregulated byproduct of tap water disinfection and a manufactured chemical used in chemical synthesis and as an ingredient in fire extinguishing fluids.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 Dibromomethane

Health Based Limits for Dibromomethane

There are no health based standards that EWG is using for this chemical

Testing Results

Testing DateAverage
Result
Samples taken that dayNumber of Non-DetectsRange of Results
2009-02-110 ppb220 ppb
2008-10-160 ppb440 ppb
2008-09-110 ppb220 ppb
2008-08-270 ppb330 ppb
2008-06-050 ppb330 ppb
2008-06-040 ppb110 ppb
2008-03-170 ppb330 ppb
2007-12-260 ppb220 ppb
2007-12-050 ppb440 ppb
2007-09-200 ppb440 ppb
2007-09-190 ppb330 ppb
2007-09-170 ppb110 ppb
2007-07-260 ppb220 ppb
2007-06-210 ppb330 ppb
2007-03-210 ppb330 ppb
2007-02-050 ppb110 ppb
2006-11-010 ppb220 ppb
2006-08-230 ppb110 ppb
2006-07-260 ppb440 ppb
2006-07-200 ppb220 ppb
2006-05-110 ppb220 ppb
2006-03-300 ppb110 ppb
2006-03-150 ppb220 ppb
2005-12-290 ppb110 ppb
2005-11-290 ppb110 ppb
2005-10-310 ppb110 ppb
2005-09-300 ppb110 ppb
2005-09-220 ppb110 ppb
2005-08-250 ppb110 ppb
2005-07-250 ppb220 ppb
2005-05-310 ppb110 ppb
2004-08-050 ppb110 ppb
2004-07-150 ppb110 ppb
2004-06-080 ppb110 ppb
2004-06-070 ppb440 ppb