Dibromochloromethane
Mulberry Grove
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 | 0.925 ppb | 4 | 4 | 0.652 ppb - 1.23 ppb |
| 2019 | 0.548 ppb | 4 | 2 | ND - 1.15 ppb |
| 2020 | 1.22 ppb | 4 | 3 | ND - 1.92 ppb |
| 2021 | 0.843 ppb | 8 | 8 | 0.660 ppb - 1.46 ppb |
| 2022 | 1.09 ppb | 12 | 12 | 0.522 ppb - 2.09 ppb |
| 2023 | 1.06 ppb | 11 | 11 | 0.689 ppb - 2.37 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 | 8031088-02 | 0.689 ppb |
| 2018-06-12 | 8062642-02 | 1.13 ppb |
| 2018-09-10 | 8091706-02 | 1.23 ppb |
| 2018-12-03 | 8120566-02 | 0.652 ppb |
| 2019-03-11 | 9031720-02 | ND |
| 2019-06-11 | 9062194-02 | 1.15 ppb |
| 2019-09-17 | 9093496-02 | 1.04 ppb |
| 2019-12-09 | 9122108-02 | ND |
| 2020-03-11 | 0032424-02 | ND |
| 2020-06-10 | 0062552-02 | 1.86 ppb |
| 2020-09-21 | 0094680-02 | 1.92 ppb |
| 2020-12-09 | 0122295-02 | 1.10 ppb |
| 2021-03-16 | EC03629-02 | 0.878 ppb |
| 2021-06-22 | EF04703-02 | 1.46 ppb |
| 2021-09-13 | EI02853-01 | 0.752 ppb |
| 2021-09-13 | EI02857-02 | 0.784 ppb |
| 2021-09-13 | EI02853-02 | 0.749 ppb |
| 2021-12-13 | EL03226-02 | 0.679 ppb |
| 2021-12-13 | EL03226-01 | 0.779 ppb |
| 2021-12-13 | EL03129-02 | 0.660 ppb |
| 2022-03-15 | FC03042-03 | 0.626 ppb |
| 2022-03-15 | FC03042-02 | 0.522 ppb |
| 2022-03-15 | FC03042-01 | 0.598 ppb |
| 2022-06-14 | FF03356-01 | 1.86 ppb |
| 2022-06-14 | FF03356-02 | 2.09 ppb |
| 2022-06-14 | FF03356-03 | 1.98 ppb |
| 2022-09-14 | FI03084-01 | 1.02 ppb |
| 2022-09-14 | FI03084-02 | 1.11 ppb |
| 2022-09-14 | FI03084-03 | 1.11 ppb |
| 2022-12-12 | FL02955-02 | 0.701 ppb |
| 2022-12-12 | FL02955-03 | 0.685 ppb |
| 2022-12-12 | FL02955-01 | 0.765 ppb |
| 2023-03-13 | GC02735-01 | 0.799 ppb |
| 2023-03-13 | GC02739-01 | 0.761 ppb |
| 2023-03-13 | GC02739-02 | 0.814 ppb |
| 2023-06-12 | GF02722-01 | 1.07 ppb |
| 2023-06-12 | GF02722-02 | 1.11 ppb |
| 2023-06-12 | GF02931-01 | 1.15 ppb |
| 2023-09-18 | GI03453-01 | 2.37 ppb |
| 2023-09-19 | GI03451-01 | 0.969 ppb |
| 2023-09-19 | GI03451-02 | 1.16 ppb |
| 2023-12-13 | GL02752-01 | 0.797 ppb |
| 2023-12-13 | GL02752-02 | 0.689 ppb |