The Power of Information

National Drinking Water Database


City of Houston Public Works Utilities - Houston, TX


Serves 2,700,000 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
22 days
Tests ConductedNumber of individual tests done for this contaminant
180 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.<0.01 ppb
0.19 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
2006-12-200 ppb440 ppb
2006-12-070 ppb220 ppb
2006-08-100 ppb16160 ppb
2006-02-220.19 ppb12110 to 2.3 ppb
2006-02-210 ppb220 ppb
2005-12-190 ppb660 ppb
2005-10-270 ppb660 ppb
2005-07-270 ppb28280 ppb
2005-07-260 ppb880 ppb
2005-07-210 ppb440 ppb
2005-07-200 ppb12120 ppb
2005-05-050 ppb10100 ppb
2005-05-040 ppb18180 ppb
2005-04-130 ppb440 ppb
2005-01-260 ppb22220 ppb
2004-08-120 ppb660 ppb
2004-07-080 ppb440 ppb
2004-01-270 ppb440 ppb
2004-01-260 ppb330 ppb
2004-01-200 ppb110 ppb
2004-01-140 ppb220 ppb
2004-01-130 ppb660 ppb