Know Your Environment. Protect Your Health.

Dibromochloromethane

King County Water District #49

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.

 

80

Samples

0

Samples exceeding legal limit (MCL)

9

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.556 ppb163ND - 3.44 ppb
20190.729 ppb164ND - 4.89 ppb
2020N/A00N/A
20210.0901 ppb162ND - 0.786 ppb
2022ND160ND
2023ND160ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.1 ppb

The EWG Health Guideline of 0.1 ppb for dibromochloromethane was based on the California Office of Environmental Health Hazard Assessment's public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer and harm to fetal growth and development.

ppb = parts per billion

All test results

Date Lab ID Result
2018-03-14ND
2018-03-14ND
2018-03-14ND
2018-03-143.18 ppb
2018-06-13ND
2018-06-13ND
2018-06-13ND
2018-06-133.44 ppb
2018-09-13ND
2018-09-13ND
2018-09-13ND
2018-09-13ND
2018-12-12ND
2018-12-122.28 ppb
2018-12-12ND
2018-12-12ND
2019-03-141.37 ppb
2019-03-14ND
2019-03-14ND
2019-03-14ND
2019-06-19ND
2019-06-19ND
2019-06-19ND
2019-06-194.69 ppb
2019-09-124.89 ppb
2019-09-12ND
2019-09-12ND
2019-09-12ND
2019-12-10ND
2019-12-100.720 ppb
2019-12-10ND
2019-12-10ND
2021-03-114089011ND
2021-03-114089010ND
2021-03-114089008ND
2021-03-114089009ND
2021-06-1741308190.786 ppb
2021-06-174130821ND
2021-06-174130818ND
2021-06-174130820ND
2021-09-164172503ND
2021-09-1641725040.655 ppb
2021-09-164172505ND
2021-09-164172506ND
2021-12-154216003ND
2021-12-154216001ND
2021-12-154216000ND
2021-12-154216002ND
2022-03-094258217ND
2022-03-094258216ND
2022-03-094258218ND
2022-03-094258219ND
2022-06-144295079ND
2022-06-144295081ND
2022-06-144295078ND
2022-06-144295080ND
2022-09-194343604ND
2022-09-194343606ND
2022-09-194343605ND
2022-09-194343607ND
2022-12-204385595ND
2022-12-204385592ND
2022-12-204385593ND
2022-12-204385594ND
2023-03-154426548ND
2023-03-154426549ND
2023-03-154426551ND
2023-03-154426550ND
2023-06-154468693ND
2023-06-154468696ND
2023-06-154468694ND
2023-06-154468695ND
2023-09-144514556ND
2023-09-144514555ND
2023-09-144514557ND
2023-09-144514558ND
2023-12-144557058ND
2023-12-144557057ND
2023-12-144557059ND
2023-12-144557060ND