The Power of Information

National Drinking Water Database


Williams Water Supply Utilities - Webster City, IA


Serves 427 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
20 days
Tests ConductedNumber of individual tests done for this contaminant
20 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.1.7 ppb
4 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
2009-05-053 ppb103 ppb
2009-01-262 ppb102 ppb
2008-11-112 ppb102 ppb
2008-08-111 ppb101 ppb
2008-05-203 ppb103 ppb
2008-01-160 ppb110 ppb
2007-11-151 ppb101 ppb
2007-08-020 ppb110 ppb
2007-05-093 ppb103 ppb
2007-01-183 ppb103 ppb
2006-11-113 ppb103 ppb
2006-07-124 ppb104 ppb
2006-05-083 ppb103 ppb
2006-02-144 ppb104 ppb
2005-11-090 ppb110 ppb
2005-07-260 ppb110 ppb
2005-04-190 ppb110 ppb
2005-01-242 ppb102 ppb
2004-11-010 ppb110 ppb
2004-08-030 ppb110 ppb