Know Your Environment. Protect Your Health.

Bromodichloromethane

Lake Delton 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.

 

19

Samples

0

Samples exceeding legal limit (MCL)

7

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.750 ppb110.750 ppb
20190.690 ppb110.690 ppb
20200.184 ppb82ND - 0.770 ppb
20210.435 ppb21ND - 0.870 ppb
20220.570 ppb110.570 ppb
20230.183 ppb61ND - 1.10 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
2018-07-1810683560.750 ppb
2019-07-2211359810.690 ppb
2020-04-20409868ND
2020-05-28424672ND
2020-05-28424675ND
2020-05-28424681ND
2020-06-02426799ND
2020-06-02426789ND
2020-06-024267860.770 ppb
2020-07-084427870.700 ppb
2021-01-20526112ND
2021-07-2010277860.870 ppb
2022-07-1411638750.570 ppb
2023-03-201301274ND
2023-03-201301276ND
2023-04-191316618ND
2023-04-201316620ND
2023-04-201316622ND
2023-07-1713492671.10 ppb