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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Bristol County Water Authority

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.

MORE ABOUT THIS CONTAMINANT

 

131

Samples

0

Samples exceeding legal limit (MCL)

58

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.471 ppb2218ND - 0.780 ppb
20150.440 ppb51ND - 2.20 ppb
2016ND40ND
20170.323 ppb2613ND - 1.000 ppb
20180.221 ppb3913ND - 0.900 ppb
20190.271 ppb3513ND - 1.20 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG 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

All test results

Date Lab ID Result
2014-01-211401190-04_TO12ND
2014-01-211401190-03_TO12ND
2014-01-211401190-02_TO12ND
2014-02-191401528-07_TO020.670 ppb
2014-02-191401528-08_TO020.510 ppb
2014-02-201401528-09_TO020.490 ppb
2014-02-201401528-01_TO020.450 ppb
2014-02-201401528-02_TO020.690 ppb
2014-02-201401528-03_TO020.520 ppb
2014-02-201401528-05_TO020.420 ppb
2014-02-201401528-06_TO020.500 ppb
2014-02-201401528-04_TO020.440 ppb
2014-03-191401911-01_TO020.780 ppb
2014-03-191401911-02_TO020.590 ppb
2014-03-191401911-03_TO020.520 ppb
2014-03-191401911-05_TO020.580 ppb
2014-03-191401911-06_TO020.640 ppb
2014-03-191401911-08_TO020.630 ppb
2014-03-191401911-04_TO020.600 ppb
2014-03-201401911-07_TO020.760 ppb
2014-03-201401911-09_TO020.570 ppb
2014-09-081404927-01_TO12ND
2015-01-051501009-03_TO12ND
2015-01-051501009-02_TO12ND
2015-01-051501009-04_TO12ND
2015-07-171503203-01_TO12ND
2015-12-301512733-01_TO122.20 ppb
2016-03-091601434-04_TO12ND
2016-03-091601434-03_TO12ND
2016-03-091601434-02_TO12ND
2016-07-191603486-01_TO12ND
2017-01-311701087-04_TO12ND
2017-01-311701087-03_TO12ND
2017-01-311701087-02_TO12ND
2017-08-151708371-01ND
2017-08-151708371-021.000 ppb
2017-08-151708371-04ND
2017-08-151708371-06ND
2017-08-151708371-07ND
2017-08-151708371-08ND
2017-08-151708371-09ND
2017-08-151708371-10ND
2017-08-161708371-11ND
2017-08-161708371-030.500 ppb
2017-08-161708371-05ND
2017-08-161703873-02_TO12ND
2017-11-211711644-010.600 ppb
2017-11-211711644-020.800 ppb
2017-11-211711644-030.700 ppb
2017-11-211711644-040.600 ppb
2017-11-211711644-050.700 ppb
2017-11-211711644-060.600 ppb
2017-11-211711644-070.700 ppb
2017-11-211711644-100.600 ppb
2017-11-211711644-090.600 ppb
2017-11-221711644-080.500 ppb
2017-11-221711644-110.500 ppb
2018-01-091800842-03_TO12ND
2018-01-091800842-02_TO12ND
2018-01-091800842-01_TO12ND
2018-02-201802398-010.500 ppb
2018-02-201802398-020.900 ppb
2018-02-201802398-030.500 ppb
2018-02-201802398-040.600 ppb
2018-02-201802398-050.600 ppb
2018-02-201802398-060.900 ppb
2018-02-201802398-070.600 ppb
2018-02-201802398-080.600 ppb
2018-02-201802398-09ND
2018-02-211802398-11ND
2018-02-211802398-100.500 ppb
2018-05-151805423-01ND
2018-05-151805423-020.600 ppb
2018-05-151805423-03ND
2018-05-151805423-04ND
2018-05-151805423-05ND
2018-05-151805423-060.500 ppb
2018-05-151805423-07ND
2018-05-151805423-08ND
2018-08-211808574-01ND
2018-08-211808574-02ND
2018-08-211808575-01ND
2018-08-211808575-020.900 ppb
2018-08-211808575-03ND
2018-08-211808575-04ND
2018-08-221808575-05ND
2018-08-221808575-06ND
2018-08-311803935-01_TO12ND
2018-11-201811558-01ND
2018-11-201811558-020.900 ppb
2018-11-201811558-03ND
2018-11-201811558-04ND
2018-11-201811558-05ND
2018-11-201811558-06ND
2018-11-201811558-07ND
2018-11-201811558-08ND
2019-01-221900905-02_TO12ND
2019-01-221900905-03_TO12ND
2019-01-221900905-04_TO12ND
2019-02-191902390-01ND
2019-02-191902390-020.600 ppb
2019-02-191902390-030.500 ppb
2019-02-191902390-040.700 ppb
2019-02-191902390-060.600 ppb
2019-02-191902390-07ND
2019-02-191902390-08ND
2019-02-201902390-05ND
2019-05-211905740-01ND
2019-05-211905740-02ND
2019-05-211905740-03ND
2019-05-211905740-04ND
2019-05-211905740-05ND
2019-05-211905740-06ND
2019-05-211905740-07ND
2019-05-211905740-08ND
2019-08-2019H0643-01ND
2019-08-2019H0643-020.600 ppb
2019-08-2019H0643-03ND
2019-08-2019H0643-04ND
2019-08-2019H0643-05ND
2019-08-2019H0643-060.700 ppb
2019-08-2019H0643-07ND
2019-08-2019H0643-08ND
2019-11-1919K0600-010.600 ppb
2019-11-1919K0600-021.20 ppb
2019-11-1919K0600-030.900 ppb
2019-11-1919K0600-040.700 ppb
2019-11-1919K0600-05ND
2019-11-1919K0600-061.20 ppb
2019-11-1919K0600-070.600 ppb
2019-11-1919K0600-080.600 ppb