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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

City of Bothell Water

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

 

96

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
20150.229 ppb164ND - 1.01 ppb
20160.0350 ppb161ND - 0.560 ppb
2017ND160ND
2018ND160ND
2019ND160ND

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
2014-01-1300704ND
2014-01-1300703ND
2014-01-1300705ND
2014-01-1400706ND
2014-04-1406523ND
2014-04-1406521ND
2014-04-1406522ND
2014-04-1406520ND
2014-07-1812851ND
2014-07-1812850ND
2014-07-1812848ND
2014-07-1812849ND
2014-10-1319156ND
2014-10-1319155ND
2014-10-1319154ND
2014-10-1319153ND
2015-02-1846803ND
2015-02-1846802ND
2015-02-1846801ND
2015-02-1846804ND
2015-04-1492004ND
2015-04-1492003ND
2015-04-1492002ND
2015-04-1492001ND
2015-07-1340603ND
2015-07-1340601ND
2015-07-1340602ND
2015-07-1340604ND
2015-10-13231031.01 ppb
2015-10-13231020.870 ppb
2015-10-13231010.830 ppb
2015-10-13231040.960 ppb
2016-01-12ND
2016-01-12ND
2016-01-12ND
2016-01-120.560 ppb
2016-04-12ND
2016-04-12ND
2016-04-12ND
2016-04-12ND
2016-07-12ND
2016-07-12ND
2016-07-12ND
2016-07-12ND
2016-10-11ND
2016-10-11ND
2016-10-11ND
2016-10-11ND
2017-01-12ND
2017-01-12ND
2017-01-12ND
2017-01-12ND
2017-04-11ND
2017-04-11ND
2017-04-11ND
2017-04-11ND
2017-07-11ND
2017-07-11ND
2017-07-11ND
2017-07-11ND
2017-10-11ND
2017-10-11ND
2017-10-11ND
2017-10-11ND
2018-01-12ND
2018-01-12ND
2018-01-12ND
2018-01-12ND
2018-04-10ND
2018-04-10ND
2018-04-10ND
2018-04-10ND
2018-07-10ND
2018-07-10ND
2018-07-10ND
2018-07-10ND
2018-10-09ND
2018-10-09ND
2018-10-09ND
2018-10-09ND
2019-01-15ND
2019-01-15ND
2019-01-15ND
2019-01-15ND
2019-04-16ND
2019-04-16ND
2019-04-16ND
2019-04-16ND
2019-07-19ND
2019-07-19ND
2019-07-19ND
2019-07-19ND
2019-10-15ND
2019-10-15ND
2019-10-15ND
2019-10-15ND