Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Dibromochloromethane

Marshall Waterworks

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.

 

19

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND40ND
20130.0700 ppb82ND - 0.350 ppb
20140.128 ppb41ND - 0.510 ppb
20150.180 ppb110.180 ppb
2016ND10ND
20170.350 ppb110.350 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
2012-06-19OW004720ND
2012-06-19OW004719ND
2012-09-10OX000854ND
2012-11-05OX001574ND
2013-02-12OX002419ND
2013-02-12OX002418ND
2013-02-12OX002417ND
2013-04-02OX002886ND
2013-07-01OY000002ND
2013-07-08OY000057ND
2013-07-08OY0000550.350 ppb
2013-07-08OY0000560.210 ppb
2014-02-05118447001ND
2014-02-11119095001ND
2014-02-19120152001ND
2014-07-151452170010.510 ppb
2015-08-118763110.180 ppb
2016-09-14945845ND
2017-07-2510066070.350 ppb