Know Your Environment. Protect Your Health.

Bromodichloromethane

Marilee Elmont

Bromodichloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromodichloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

 

30

Samples

0

Samples exceeding legal limit (MCL)

18

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20182.92 ppb54ND - 5.95 ppb
20190.766 ppb52ND - 2.78 ppb
20201.76 ppb52ND - 5.04 ppb
20212.71 ppb551.37 ppb - 5.09 ppb
20220.746 ppb52ND - 2.48 ppb
20230.976 ppb53ND - 2.52 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.06 ppb

The EWG Health Guideline of 0.06 ppb for bromodichloromethane 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
2018-03-06Q18092850122.17 ppb
2018-03-06Q18092850041.34 ppb
2018-09-24Q18382990015.95 ppb
2018-09-24Q18382990025.15 ppb
2018-12-11Q1850963001ND
2019-03-28Q19126900032.78 ppb
2019-03-28Q1912690005ND
2019-09-24Q19684830011.05 ppb
2019-09-24Q1968483002ND
2019-10-23Q1973423001ND
2020-06-18Q2024779001ND
2020-06-18Q2024779002ND
2020-10-15Q20405000015.04 ppb
2020-10-15Q20405000033.77 ppb
2020-10-15Q2040500005ND
2021-06-16Q21157700012.23 ppb
2021-06-16Q21157700023.06 ppb
2021-10-13Q21286580075.09 ppb
2021-10-13Q21286580091.78 ppb
2021-10-13Q21286580111.37 ppb
2022-06-15Q22166890021.25 ppb
2022-06-15Q2216689003ND
2022-06-15Q22166890042.48 ppb
2022-06-15Q2216689006ND
2022-06-15Q2216689008ND
2023-08-14Q2333684001ND
2023-08-14Q23336840021.23 ppb
2023-08-14Q23336840031.13 ppb
2023-08-14Q2333684005ND
2023-10-31Q23465610012.52 ppb