Know Your Environment. Protect Your Health.

Dibromochloromethane

Johnson City Water Department

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.

 

77

Samples

0

Samples exceeding legal limit (MCL)

9

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND20ND
2020N/A00N/A
20210.220 ppb194ND - 1.22 ppb
2022ND220ND
20230.156 ppb325ND - 1.000 ppb

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 Result
2018-09-18ND
2018-09-18ND
2019-09-30ND
2019-09-30ND
2021-09-011.22 ppb
2021-09-01ND
2021-09-01ND
2021-09-01ND
2021-09-011.10 ppb
2021-09-01ND
2021-09-011.21 ppb
2021-09-01ND
2021-09-01ND
2021-09-21ND
2021-09-210.651 ppb
2021-12-01ND
2021-12-01ND
2021-12-01ND
2021-12-01ND
2021-12-01ND
2021-12-01ND
2021-12-01ND
2021-12-01ND
2022-06-01ND
2022-06-01ND
2022-06-01ND
2022-06-01ND
2022-06-01ND
2022-06-01ND
2022-06-01ND
2022-06-01ND
2022-06-01ND
2022-09-07ND
2022-09-07ND
2022-09-07ND
2022-09-07ND
2022-12-08ND
2022-12-08ND
2022-12-08ND
2022-12-08ND
2022-12-08ND
2022-12-08ND
2022-12-08ND
2022-12-08ND
2022-12-08ND
2023-03-01ND
2023-03-01ND
2023-03-01ND
2023-03-01ND
2023-03-01ND
2023-03-01ND
2023-03-01ND
2023-03-01ND
2023-06-07ND
2023-06-07ND
2023-06-07ND
2023-06-071.000 ppb
2023-06-07ND
2023-06-07ND
2023-06-07ND
2023-06-07ND
2023-09-061.000 ppb
2023-09-061.000 ppb
2023-09-06ND
2023-09-06ND
2023-09-061.000 ppb
2023-09-06ND
2023-09-061.000 ppb
2023-09-06ND
2023-12-07ND
2023-12-07ND
2023-12-07ND
2023-12-07ND
2023-12-07ND
2023-12-07ND
2023-12-07ND
2023-12-07ND