The Power of Information

National Drinking Water Database


Baltimore City Department of Public Works Utilities - Baltimore, MD


Serves 1,600,000 people

Dichloroacetic acid

Dichloroacetic 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
105 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
105 days
Tests ConductedNumber of individual tests done for this contaminant
443 tests

Testing Summary

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
Dichloroacetic acidDichloroacetic 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.18.17 ppb
31 ppb
Yes
MCLGA non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.: 0 ppb
No
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 Dichloroacetic acid

Health Based Limits for Dichloroacetic acid

StandardDescriptionLevel
Maximum Contaminant Limit Goal (MCLG)A non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.0 ppb
One in one million (10-6) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 1,000,000. Source: U.S. Environmental Protection Agency.0.7 ppb
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
One in ten thousand (10-4) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 10,000. Source: U.S. Environmental Protection Agency.70 ppb
Drinking Water Equivalent LevelA lifetime exposure concentration protective of adverse, noncarcinogenic health effects, that assumes all of the exposure to a contaminant is from drinking water. Source: U.S. Environmental Protection Agency.100 ppb
Children's health-based limit for 1-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for up to one day of exposure. The One-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.5000 ppb
Children's health-based limit for 10-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic effects for up to ten days of exposure. The Ten-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.5000 ppb

Testing Results

Testing DateAverage
Result
Samples taken that dayNumber of Non-DetectsRange of Results
2007-11-1915.5 ppb604 to 22 ppb
2007-11-1829 ppb1029 ppb
2007-11-1615.5 ppb606 to 21 ppb
2007-11-1415.33 ppb607 to 21 ppb
2007-09-1913.5 ppb206 to 21 ppb
2007-09-1813.5 ppb206 to 21 ppb
2007-09-1715 ppb3013 to 18 ppb
2007-09-1414.18 ppb1106 to 30 ppb
2007-07-1917.33 ppb604 to 29 ppb
2007-07-1812.5 ppb208 to 17 ppb
2007-07-1710 ppb207 to 13 ppb
2007-07-1616 ppb607 to 23 ppb
2007-05-1620.33 ppb3019 to 22 ppb
2007-05-1514.5 ppb209 to 20 ppb
2007-05-1418.83 ppb607 to 23 ppb
2007-05-1120 ppb6014 to 25 ppb
2007-03-2129.33 ppb3023 to 36 ppb
2007-03-2025.5 ppb2024 to 27 ppb
2007-03-1923 ppb604 to 34 ppb
2007-03-1623 ppb5013 to 30 ppb
2007-02-0219 ppb1019 ppb
2007-01-2417 ppb2014 to 20 ppb
2007-01-2315.5 ppb2013 to 18 ppb
2007-01-2215 ppb6012 to 22 ppb
2007-01-1919 ppb5015 to 22 ppb
2006-11-2214 ppb1014 ppb
2006-11-2118.33 ppb3015 to 22 ppb
2006-11-2019.83 ppb602 to 33 ppb
2006-11-1717.5 ppb6012 to 24 ppb
2006-09-2018 ppb308 to 27 ppb
2006-09-1922.5 ppb2018 to 27 ppb
2006-09-1814.33 ppb603 to 22 ppb
2006-09-1518 ppb610 to 37 ppb
2006-08-1623.5 ppb2014 to 33 ppb
2006-08-1514.5 ppb2012 to 17 ppb
2006-08-1420.17 ppb605 to 35 ppb
2006-08-1123 ppb507 to 36 ppb
2006-07-1925 ppb308 to 37 ppb
2006-07-1816.5 ppb208 to 25 ppb
2006-07-1410 ppb1010 ppb
2006-05-1724.67 ppb3022 to 26 ppb
2006-05-1615.33 ppb304 to 24 ppb
2006-05-1519.83 ppb6017 to 25 ppb
2006-05-1216.8 ppb502 to 27 ppb
2006-03-2222 ppb2015 to 29 ppb
2006-03-2113.5 ppb2011 to 16 ppb
2006-03-2011 ppb602 to 15 ppb
2006-03-1723.67 ppb610 to 33 ppb
2006-03-1229 ppb1029 ppb
2006-01-2320.17 ppb6016 to 25 ppb
2006-01-2015.5 ppb6012 to 19 ppb
2006-01-1814.5 ppb4013 to 16 ppb
2006-01-1728.5 ppb2020 to 37 ppb
2005-11-1616 ppb3010 to 21 ppb
2005-11-1515 ppb2011 to 19 ppb
2005-11-1413.67 ppb610 to 23 ppb
2005-11-1114.38 ppb808 to 22 ppb
2005-09-219.25 ppb420 to 21 ppb
2005-09-2015.5 ppb2011 to 20 ppb
2005-09-1913.33 ppb606 to 21 ppb
2005-09-1613.86 ppb710 to 30 ppb
2005-07-2027 ppb4019 to 30 ppb
2005-07-1925 ppb2024 to 26 ppb
2005-07-1819.17 ppb6012 to 27 ppb
2005-07-1523.6 ppb506 to 36 ppb
2005-06-2421.4 ppb5010 to 35 ppb
2005-06-2217.8 ppb5012 to 26 ppb
2005-06-2115 ppb2013 to 17 ppb
2005-06-2015.33 ppb3013 to 19 ppb
2005-05-1821.7 ppb3013.6 to 32.1 ppb
2005-05-1721.9 ppb2019.5 to 24.3 ppb
2005-05-1616.36 ppb607.94 to 22.1 ppb
2005-05-1319.01 ppb7010.1 to 26.3 ppb
2005-03-2314.67 ppb6010 to 24 ppb
2005-03-2213.86 ppb701 to 21 ppb
2005-03-2113 ppb5011 to 19 ppb
2005-02-2816 ppb4013 to 20 ppb
2005-02-2515.5 ppb8011 to 22 ppb
2005-02-2310.75 ppb402 to 15 ppb
2005-02-2213 ppb3012 to 14 ppb
2004-11-1814 ppb1014 ppb
2004-11-1715.4 ppb501 to 40 ppb
2004-11-1614.57 ppb702 to 41 ppb
2004-11-1511.33 ppb610 to 21 ppb
2004-09-2231 ppb3030 to 33 ppb
2004-09-2127 ppb2026 to 28 ppb
2004-09-2013.33 ppb604 to 26 ppb
2004-09-1710.13 ppb802 to 21 ppb
2004-07-2122 ppb4019 to 24 ppb
2004-07-2017 ppb2010 to 24 ppb
2004-07-1925.6 ppb5013 to 38 ppb
2004-07-1612.43 ppb704 to 18 ppb
2004-07-0925 ppb1025 ppb
2004-05-1916.67 ppb306 to 25 ppb
2004-05-1828 ppb3026 to 30 ppb
2004-05-1723.4 ppb5019 to 26 ppb
2004-05-1419.63 ppb806 to 29 ppb
2004-03-2422 ppb4017 to 30 ppb
2004-03-2322 ppb2020 to 24 ppb
2004-03-2223.75 ppb4012 to 33 ppb
2004-03-1923.78 ppb9014 to 42 ppb
2004-01-2816.67 ppb3016 to 18 ppb
2004-01-2715.33 ppb3013 to 19 ppb
2004-01-2617 ppb4014 to 19 ppb
2004-01-2313 ppb501 to 20 ppb