The Power of Information

National Drinking Water Database


Baltimore City Department of Public Works Utilities - Baltimore, MD


Serves 1,600,000 people

Bromodichloromethane

Bromodichloromethane is a disinfection byproduct from the trihalomethane (THM) family, and is 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
109 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
109 days
Tests ConductedNumber of individual tests done for this contaminant
455 tests

Testing Summary

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
BromodichloromethaneBromodichloromethane is a disinfection byproduct from the trihalomethane (THM) family, and is formed when chlorine, chloramines or other disinfectants react with organic and inorganic matter in water.8.25 ppb
12 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
80 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 Bromodichloromethane

Health Based Limits for Bromodichloromethane

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
EPA Human Health Water Quality CriteriaWater quality criteria set by the US EPA provide guidance for states and tribes authorized to establish water quality standards under the Clean Water Act (CWA) to protect human health. These are non-enforceable standards based upon exposure by both drinking water and the contribution of water contamination to other consumed foods. Source: U.S. Environmental Protection Agency.0.55 ppb
EPA Human Health Water Quality CriteriaWater quality criteria set by the US EPA provide guidance for states and tribes authorized to establish water quality standards under the Clean Water Act (CWA) to protect human health. These are non-enforceable standards based upon exposure by both drinking water and the contribution of water contamination to other consumed foods. Source: U.S. Environmental Protection Agency.0.55 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.1 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.60 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.80 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.100 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.1000 ppb

Testing Results

Testing DateAverage
Result
Samples taken that dayNumber of Non-DetectsRange of Results
2007-11-197.17 ppb606 to 9 ppb
2007-11-187 ppb107 ppb
2007-11-168 ppb606 to 9 ppb
2007-11-148.33 ppb607 to 11 ppb
2007-09-1910.5 ppb2010 to 11 ppb
2007-09-1810.5 ppb2010 to 11 ppb
2007-09-1710.67 ppb3010 to 12 ppb
2007-09-1410.82 ppb11010 to 12 ppb
2007-07-1910 ppb609 to 11 ppb
2007-07-188.5 ppb207 to 10 ppb
2007-07-178 ppb206 to 10 ppb
2007-07-168.17 ppb605 to 10 ppb
2007-05-168.67 ppb308 to 9 ppb
2007-05-157 ppb206 to 8 ppb
2007-05-148.17 ppb607 to 9 ppb
2007-05-118.17 ppb607 to 9 ppb
2007-03-294.17 ppb300.5 to 6 ppb
2007-03-217.67 ppb306 to 9 ppb
2007-03-209 ppb207 to 11 ppb
2007-03-197 ppb606 to 8 ppb
2007-03-168.4 ppb506 to 12 ppb
2007-02-027 ppb107 ppb
2007-01-247 ppb206 to 8 ppb
2007-01-236.5 ppb206 to 7 ppb
2007-01-226.33 ppb605 to 8 ppb
2007-01-196.6 ppb506 to 7 ppb
2006-11-228 ppb108 ppb
2006-11-218 ppb307 to 9 ppb
2006-11-208.83 ppb606 to 10 ppb
2006-11-179 ppb607 to 10 ppb
2006-09-2010.33 ppb309 to 11 ppb
2006-09-1910 ppb209 to 11 ppb
2006-09-1810 ppb608 to 12 ppb
2006-09-1510.33 ppb609 to 12 ppb
2006-08-169.5 ppb208 to 11 ppb
2006-08-1511.5 ppb2011 to 12 ppb
2006-08-149.67 ppb608 to 11 ppb
2006-08-119.6 ppb509 to 11 ppb
2006-07-198 ppb308 ppb
2006-07-189 ppb208 to 10 ppb
2006-07-178.71 ppb707 to 10 ppb
2006-07-148.75 ppb407 to 11 ppb
2006-05-177 ppb307 ppb
2006-05-166.67 ppb306 to 8 ppb
2006-05-157.33 ppb607 to 8 ppb
2006-05-126.2 ppb506 to 7 ppb
2006-03-227 ppb206 to 8 ppb
2006-03-218.5 ppb208 to 9 ppb
2006-03-207 ppb606 to 8 ppb
2006-03-176.5 ppb605 to 8 ppb
2006-03-128 ppb108 ppb
2006-01-236 ppb605 to 7 ppb
2006-01-206.5 ppb605 to 8 ppb
2006-01-186.25 ppb406 to 7 ppb
2006-01-174.5 ppb201 to 8 ppb
2005-11-168 ppb307 to 9 ppb
2005-11-158.5 ppb208 to 9 ppb
2005-11-146.83 ppb601 to 10 ppb
2005-11-119.13 ppb808 to 11 ppb
2005-09-219 ppb408 to 10 ppb
2005-09-209 ppb208 to 10 ppb
2005-09-199.33 ppb608 to 12 ppb
2005-09-169.33 ppb607 to 11 ppb
2005-07-2010 ppb409 to 11 ppb
2005-07-1910 ppb209 to 11 ppb
2005-07-1810.83 ppb609 to 12 ppb
2005-07-1512 ppb5010 to 14 ppb
2005-06-249 ppb507 to 11 ppb
2005-06-2210 ppb509 to 12 ppb
2005-06-218.5 ppb208 to 9 ppb
2005-06-207.83 ppb607 to 8 ppb
2005-03-236.5 ppb606 to 8 ppb
2005-03-226.43 ppb706 to 8 ppb
2005-03-219.4 ppb505 to 21 ppb
2005-02-287.5 ppb407 to 9 ppb
2005-02-256.88 ppb805 to 11 ppb
2005-02-235.25 ppb405 to 6 ppb
2005-02-227.33 ppb307 to 8 ppb
2005-01-267.17 ppb606 to 9 ppb
2005-01-247 ppb107 ppb
2005-01-196.67 ppb305 to 8 ppb
2005-01-186 ppb206 ppb
2004-11-188 ppb108 ppb
2004-11-178 ppb505 to 9 ppb
2004-11-168.83 ppb606 to 13 ppb
2004-11-158.17 ppb606 to 9 ppb
2004-09-2210.33 ppb308 to 12 ppb
2004-09-2111.5 ppb2010 to 13 ppb
2004-09-2010 ppb608 to 12 ppb
2004-09-1710.63 ppb807 to 14 ppb
2004-07-219.25 ppb408 to 11 ppb
2004-07-2010 ppb209 to 11 ppb
2004-07-198.8 ppb505 to 11 ppb
2004-07-169.43 ppb706 to 11 ppb
2004-07-137.85 ppb207.7 to 8 ppb
2004-07-0910 ppb1010 ppb
2004-05-198 ppb306 to 9 ppb
2004-05-189 ppb308 to 10 ppb
2004-05-178.2 ppb507 to 11 ppb
2004-05-148.88 ppb807 to 11 ppb
2004-03-247 ppb405 to 8 ppb
2004-03-238.5 ppb208 to 9 ppb
2004-03-227.75 ppb407 to 9 ppb
2004-03-197.11 ppb906 to 9 ppb
2004-01-286.67 ppb306 to 7 ppb
2004-01-276.67 ppb305 to 8 ppb
2004-01-267 ppb406 to 8 ppb
2004-01-237.8 ppb505 to 11 ppb
2004-01-066.15 ppb206.1 to 6.2 ppb