The Power of Information

National Drinking Water Database


City of Napa Utilities - Napa, CA


Serves 70,000 people

Dibromoacetic acid

Dibromoacetic acid is a disinfection byproduct regulated by EPA as one of five haloacetic acids that are formed when chlorine, chloramines or other disinfectants react with organic and inorganic matter in water.
 
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
57 days
Tests ConductedNumber of individual tests done for this contaminant
481 tests

Testing Summary

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
Dibromoacetic acidDibromoacetic acid is a disinfection byproduct regulated by EPA as one of five haloacetic acids that are formed when chlorine, chloramines or other disinfectants react with organic and inorganic matter in water.0.06 ppb
0.9 ppb
NoNo
60 ppb
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 Dibromoacetic acid

Health Based Limits for Dibromoacetic acid

StandardDescriptionLevel
Maximum Contaminant Limit (MCL)The enforceable standard which defines the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to health-based limits (Maximum Contaminant Level Goals, or MCLGs) as feasible using the best available analytical and treatment technologies and taking cost into consideration. Source: U.S. Environmental Protection Agency.60 ppb

Testing Results

Testing DateAverage
Result
Samples taken that dayNumber of Non-DetectsRange of Results
2009-03-170 ppb440 ppb
2009-03-040 ppb110 ppb
2009-02-040.9 ppb21100 to 2.3 ppb
2009-01-070 ppb550 ppb
2008-12-030.05 ppb21200 to 1.1 ppb
2008-11-050 ppb10100 ppb
2008-10-010 ppb31310 ppb
2008-09-030 ppb15150 ppb
2008-08-060 ppb31310 ppb
2008-07-160 ppb110 ppb
2008-06-040 ppb26260 ppb
2008-05-070.23 ppb870 to 1.8 ppb
2008-04-020 ppb20200 ppb
2008-03-050.38 ppb430 to 1.5 ppb
2008-02-060 ppb440 ppb
2008-01-090.2 ppb540 to 1 ppb
2007-12-050 ppb660 ppb
2007-11-070 ppb880 ppb
2007-10-030 ppb12120 ppb
2007-09-050 ppb12120 ppb
2007-08-010 ppb12120 ppb
2007-07-160 ppb15150 ppb
2007-06-060 ppb10100 ppb
2007-05-020.31 ppb860 to 1.3 ppb
2007-04-040 ppb440 ppb
2007-03-070.68 ppb420 to 1.6 ppb
2007-02-070 ppb440 ppb
2007-01-030.33 ppb430 to 1.3 ppb
2006-12-060 ppb440 ppb
2006-11-080 ppb440 ppb
2006-10-040 ppb880 ppb
2006-09-060 ppb660 ppb
2006-08-020 ppb880 ppb
2006-07-050.26 ppb1080 to 1.4 ppb
2006-06-070 ppb880 ppb
2006-05-030 ppb440 ppb
2006-03-010 ppb440 ppb
2005-12-070 ppb440 ppb
2005-11-090 ppb440 ppb
2005-10-050 ppb12120 ppb
2005-07-200 ppb110 ppb
2005-07-130 ppb110 ppb
2005-06-010.13 ppb870 to 1 ppb
2005-05-040 ppb440 ppb
2005-04-060 ppb440 ppb
2005-03-020 ppb440 ppb
2005-02-020 ppb440 ppb
2005-01-050 ppb110 ppb
2004-12-080 ppb440 ppb
2004-11-100 ppb440 ppb
2004-10-060 ppb880 ppb
2004-09-010 ppb12120 ppb
2004-08-020.25 ppb12110 to 3 ppb
2004-07-140 ppb12120 ppb
2004-06-020 ppb110 ppb
2004-05-120 ppb15150 ppb
2004-04-070 ppb440 ppb