Know Your Environment. Protect Your Health.

Bromodichloromethane

Hamilton Water Department

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.

 

45

Samples

0

Samples exceeding legal limit (MCL)

27

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20186.56 ppb116.56 ppb
20196.85 ppb116.85 ppb
20207.18 ppb137ND - 18.0 ppb
20216.19 ppb84ND - 17.0 ppb
20228.15 ppb106ND - 16.0 ppb
20237.09 ppb128ND - 20.0 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 Result
2018-02-056.56 ppb
2019-01-236.85 ppb
2020-01-0615.0 ppb
2020-01-0611.0 ppb
2020-01-06ND
2020-02-03ND
2020-02-0314.0 ppb
2020-02-269.40 ppb
2020-02-26ND
2020-05-0513.0 ppb
2020-05-05ND
2020-08-03ND
2020-08-0318.0 ppb
2020-11-02ND
2020-11-0213.0 ppb
2021-02-027.50 ppb
2021-02-03ND
2021-02-0312.0 ppb
2021-02-04ND
2021-05-04ND
2021-05-0413.0 ppb
2021-11-0117.0 ppb
2021-11-01ND
2022-01-18ND
2022-01-188.50 ppb
2022-02-0712.0 ppb
2022-02-0715.0 ppb
2022-05-0215.0 ppb
2022-05-02ND
2022-08-04ND
2022-08-0416.0 ppb
2022-11-03ND
2022-11-0315.0 ppb
2023-02-010.820 ppb
2023-02-018.70 ppb
2023-02-019.60 ppb
2023-02-011.000 ppb
2023-04-0415.0 ppb
2023-04-04ND
2023-05-0412.0 ppb
2023-05-04ND
2023-08-02ND
2023-08-0220.0 ppb
2023-11-06ND
2023-11-0618.0 ppb