Dibromochloromethane
Southwest Warren County Municipal Authority
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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | 2.48 ppb | 9 | 5 | ND - 17.0 ppb |
| 2019 | 0.319 ppb | 8 | 3 | ND - 0.966 ppb |
| 2020 | 0.150 ppb | 8 | 2 | ND - 0.690 ppb |
| 2021 | 0.298 ppb | 8 | 3 | ND - 1.15 ppb |
| 2022 | 0.350 ppb | 8 | 2 | ND - 1.47 ppb |
| 2023 | 0.592 ppb | 8 | 6 | ND - 0.952 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 | Lab ID | Result |
|---|---|---|
| 2018-03-06 | 18C0322-03 | ND |
| 2018-03-06 | 18C0322-02 | ND |
| 2018-06-04 | 18F0332-01 | 0.810 ppb |
| 2018-06-04 | 18F0332-02 | 0.737 ppb |
| 2018-08-14 | 18H0482-01 | 17.0 ppb |
| 2018-09-04 | 18I0131-01 | 1.99 ppb |
| 2018-09-04 | 18I0131-02 | 1.76 ppb |
| 2018-12-04 | 18L0581-01 | ND |
| 2018-12-04 | 18L0581-02 | ND |
| 2019-03-05 | 19C0501-01 | ND |
| 2019-03-05 | 19C0501-02 | ND |
| 2019-06-04 | 19F0275-01 | 0.709 ppb |
| 2019-06-04 | 19F0275-02 | ND |
| 2019-09-10 | 19I0929-01 | 0.966 ppb |
| 2019-09-10 | 19I0929-02 | 0.879 ppb |
| 2019-12-10 | 19L1187-02 | ND |
| 2019-12-10 | 19L1187-01 | ND |
| 2020-03-10 | ND | |
| 2020-03-10 | ND | |
| 2020-06-09 | 0.512 ppb | |
| 2020-06-09 | ND | |
| 2020-09-08 | 0.690 ppb | |
| 2020-09-08 | ND | |
| 2020-12-08 | ND | |
| 2020-12-08 | ND | |
| 2021-03-08 | ND | |
| 2021-03-08 | ND | |
| 2021-06-08 | 0.579 ppb | |
| 2021-06-08 | ND | |
| 2021-09-07 | 0.655 ppb | |
| 2021-09-07 | 1.15 ppb | |
| 2021-12-07 | ND | |
| 2021-12-07 | ND | |
| 2022-03-08 | ND | |
| 2022-03-08 | ND | |
| 2022-06-07 | ND | |
| 2022-06-07 | ND | |
| 2022-09-06 | 1.33 ppb | |
| 2022-09-06 | 1.47 ppb | |
| 2022-12-06 | ND | |
| 2022-12-06 | ND | |
| 2023-03-07 | ND | |
| 2023-03-07 | ND | |
| 2023-06-06 | 0.936 ppb | |
| 2023-06-06 | 0.952 ppb | |
| 2023-09-05 | 0.757 ppb | |
| 2023-09-05 | 0.781 ppb | |
| 2023-12-05 | 0.652 ppb | |
| 2023-12-05 | 0.660 ppb |