Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Dibromochloromethane

Amherst DPW Water Division

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

 

97

Samples

0

Samples exceeding legal limit (MCL)

12

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND100ND
2015ND180ND
20160.207 ppb196ND - 0.950 ppb
20170.166 ppb102ND - 1.000 ppb
20180.134 ppb223ND - 1.20 ppb
20190.0406 ppb181ND - 0.730 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 Result
2014-01-17ND
2014-04-10ND
2014-07-16ND
2014-07-16ND
2014-07-16ND
2014-07-16ND
2014-07-16ND
2014-07-16ND
2014-10-07ND
2014-10-15ND
2015-01-13ND
2015-01-13ND
2015-01-13ND
2015-01-13ND
2015-04-07ND
2015-04-07ND
2015-04-07ND
2015-04-07ND
2015-07-07ND
2015-07-07ND
2015-07-07ND
2015-07-07ND
2015-09-16ND
2015-09-16ND
2015-10-07ND
2015-10-07ND
2015-10-07ND
2015-12-18ND
2016-01-12ND
2016-01-12ND
2016-01-120.700 ppb
2016-01-12ND
2016-04-12ND
2016-04-12ND
2016-04-12ND
2016-04-12ND
2016-07-120.560 ppb
2016-07-12ND
2016-07-12ND
2016-07-120.570 ppb
2016-07-19ND
2016-07-190.540 ppb
2016-10-12ND
2016-10-120.950 ppb
2016-10-12ND
2016-10-120.620 ppb
2016-10-25ND
2017-01-101.000 ppb
2017-01-100.660 ppb
2017-01-10ND
2017-01-10ND
2017-08-15ND
2017-08-15ND
2017-08-15ND
2017-08-22ND
2017-10-20ND
2017-11-07ND
2018-02-23ND
2018-02-23ND
2018-02-23ND
2018-02-23ND
2018-03-22ND
2018-03-22ND
2018-03-22ND
2018-03-22ND
2018-04-10ND
2018-04-10ND
2018-04-10ND
2018-04-10ND
2018-07-10ND
2018-07-100.890 ppb
2018-07-101.20 ppb
2018-07-10ND
2018-09-11ND
2018-10-10ND
2018-10-10ND
2018-10-100.860 ppb
2018-10-10ND
2018-11-27ND
2019-01-08ND
2019-01-08ND
2019-01-08ND
2019-01-08ND
2019-04-09ND
2019-04-09ND
2019-04-09ND
2019-04-09ND
2019-07-11ND
2019-07-11ND
2019-07-11ND
2019-07-11ND
2019-09-10ND
2019-10-01ND
2019-10-080.730 ppb
2019-10-08ND
2019-10-08ND
2019-10-08ND