Know Your Environment. Protect Your Health.

Bromodichloromethane

Theresa Waterworks

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.

 

8

Samples

0

Samples exceeding legal limit (MCL)

8

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.410 ppb110.410 ppb
20190.290 ppb220.230 ppb - 0.350 ppb
20200.790 ppb110.790 ppb
20210.590 ppb110.590 ppb
20222.23 ppb221.84 ppb - 2.61 ppb
20230.590 ppb110.590 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
2018-09-1210801030.410 ppb
2019-07-0211320200.350 ppb
2019-07-1611347830.230 ppb
2020-08-1212066060.790 ppb
2021-07-2012663140.590 ppb
2022-07-13520233051.84 ppb
2022-08-10520266972.61 ppb
2023-07-19530272840.590 ppb