Menu

EWG's Tap Water Database

Donate

Dibromochloromethane

Watertown City

Dibromochloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Dibromochloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

 

141

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20100.199 ppb165ND - 0.740 ppb
20110.458 ppb127ND - 1.10 ppb
2012ND160ND
2013ND150ND
20140.149 ppb348ND - 0.750 ppb
20150.0108 ppb481ND - 0.520 ppb

ppb = parts per billion.

State and national drinking water standards and health guidelines

Health Guideline 0.1 ppb

The health guideline of 0.1 ppb for dibromochloromethane was proposed in 2018 by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

ppb = parts per billion.

EPA Maximum Contaminant
Level Goal (MCLG)60.0 ppb

A non-enforceable federal health guideline. For cancer-causing chemicals, these health goals are typically set to zero.

ppb = parts per billion.

All test results

Date Lab ID Result
2010-02-111002459-003ND
2010-02-111002459-001ND
2010-02-111002459-004ND
2010-02-111002459-002ND
2010-05-131007613-0040.740 ppb
2010-05-131007613-0030.640 ppb
2010-05-131007613-0010.640 ppb
2010-05-131007613-0020.600 ppb
2010-08-131013847-003ND
2010-08-131013847-004ND
2010-08-131013847-001ND
2010-08-131013847-002ND
2010-11-09101957-001ND
2010-11-091019574-003ND
2010-11-091019574-002ND
2010-11-091019574-0040.560 ppb
2011-05-111106553-0010.650 ppb
2011-05-111106553-0020.610 ppb
2011-05-111106553-0041.10 ppb
2011-05-111106553-0030.590 ppb
2011-08-031112110-0030.890 ppb
2011-08-031112110-004ND
2011-08-031112110-0020.840 ppb
2011-08-031112110-0010.820 ppb
2011-11-141118448-001ND
2011-11-141118448-003ND
2011-11-141118448-002ND
2011-11-141118448-004ND
2012-02-221202714-004ND
2012-02-221202714-003ND
2012-02-221202714-002ND
2012-02-221202714-001ND
2012-05-021206534-003ND
2012-05-021206534-001ND
2012-05-021206534-004ND
2012-05-021026534-002ND
2012-08-011212371-002ND
2012-08-011212371-009ND
2012-08-011212371-006ND
2012-08-011212371-010ND
2012-11-071218302-006ND
2012-11-071218302-009ND
2012-11-071218302-010ND
2012-11-071218302-002ND
2013-02-061301770-007ND
2013-02-061301770-006ND
2013-02-061301770-008ND
2013-02-061301770-002ND
2013-05-08MRT0031 DBP 2QTR13ND
2013-05-08DS00014 DBP 2QTR13ND
2013-05-08DS00026 DBP 2QTR13ND
2013-08-061313147-004ND
2013-08-061313147-003ND
2013-08-071313147-002ND
2013-08-081313147-001ND
2013-11-061318290-012ND
2013-11-061318290-011ND
2013-11-061318290-007ND
2013-11-061318290-010ND
2014-02-051401657-012ND
2014-02-051401657-011ND
2014-02-051401657-010ND
2014-02-051401657-007ND
2014-02-051401657-013ND
2014-04-021404398-009ND
2014-05-071406257-0110.750 ppb
2014-05-071406257-0120.750 ppb
2014-05-071406257-0010.700 ppb
2014-05-071406257-0040.700 ppb
2014-07-161410755-0110.560 ppb
2014-07-161410755-0120.520 ppb
2014-07-161410755-0100.540 ppb
2014-07-161410755-0070.560 ppb
2014-08-061412351-007ND
2014-08-061412351-012ND
2014-08-061412351-011ND
2014-08-061412351-010ND
2014-09-101414832-009ND
2014-09-101414832-011ND
2014-09-101414832-008ND
2014-09-101414832-012ND
2014-10-081416618-012ND
2014-10-081416618-010ND
2014-10-081416618-011ND
2014-10-081416618-007ND
2014-11-051418303-010ND
2014-11-051418303-007ND
2014-11-051418303-011ND
2014-11-051418303-012ND
2014-12-031419724-012ND
2014-12-031419724-011ND
2014-12-031419724-008ND
2014-12-031419724-009ND
2015-01-141500772-010ND
2015-01-141500772-012ND
2015-01-151500772-011ND
2015-01-151500772-007ND
2015-02-041501522-011ND
2015-02-041501522-008ND
2015-02-041501522-012ND
2015-02-041501522-009ND
2015-03-041502825-010ND
2015-03-041502825-011ND
2015-03-041502825-012ND
2015-03-041502825-007ND
2015-04-081504564-012ND
2015-04-081504564-010ND
2015-04-081504564-011ND
2015-04-081504564-007ND
2015-05-061506084-012ND
2015-05-061506084-010ND
2015-05-061506084-007ND
2015-05-061506084-011ND
2015-06-031507791-012ND
2015-06-031507791-010ND
2015-06-031507791-011ND
2015-06-031507791-007ND
2015-07-081510103-011ND
2015-07-081510103-012ND
2015-07-081510103-010ND
2015-07-081510103-007ND
2015-08-051511980-012ND
2015-08-051511980-011ND
2015-08-051511980-0070.520 ppb
2015-08-051511980-010ND
2015-09-091514301-010ND
2015-09-091514301-012ND
2015-09-091514301-011ND
2015-09-091514301-007ND
2015-10-071516030-012ND
2015-10-071516030-011ND
2015-10-071516030-006ND
2015-10-071516030-009ND
2015-11-041517576-010ND
2015-11-041517576-011ND
2015-11-041517576-007ND
2015-11-041517576-012ND
2015-12-021519086-011ND
2015-12-021519086-012ND
2015-12-021519086-007ND
2015-12-021519086-010ND