Dibromochloromethane
Staunton
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 | 1.45 ppb | 8 | 8 | 0.992 ppb - 2.27 ppb |
| 2019 | 0.942 ppb | 8 | 8 | 0.774 ppb - 1.14 ppb |
| 2020 | 1.30 ppb | 8 | 8 | 0.548 ppb - 2.08 ppb |
| 2021 | 1.50 ppb | 8 | 8 | 0.882 ppb - 2.06 ppb |
| 2022 | 1.48 ppb | 8 | 8 | 0.944 ppb - 2.16 ppb |
| 2023 | 1.13 ppb | 8 | 8 | 0.787 ppb - 1.60 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 |
|---|---|---|
| 2018-01-08 | 8011063-01 | 0.992 ppb |
| 2018-01-08 | 8011063-02 | 1.09 ppb |
| 2018-04-03 | 8040763-01 | 1.02 ppb |
| 2018-04-03 | 8040763-02 | 1.26 ppb |
| 2018-07-31 | 8080137-01 | 1.69 ppb |
| 2018-07-31 | 8080137-02 | 1.35 ppb |
| 2018-10-02 | 8100822-02 | 1.95 ppb |
| 2018-10-02 | 8100822-01 | 2.27 ppb |
| 2019-01-15 | 9012730-02 | 0.782 ppb |
| 2019-01-15 | 9012730-01 | 1.10 ppb |
| 2019-04-23 | 9045025-01 | 0.888 ppb |
| 2019-04-23 | 9045025-02 | 0.872 ppb |
| 2019-07-09 | 9071980-02 | 1.04 ppb |
| 2019-07-09 | 9071980-01 | 1.14 ppb |
| 2019-10-28 | 9105507-02 | 0.774 ppb |
| 2019-10-28 | 9105507-01 | 0.941 ppb |
| 2020-01-14 | 0012856-02 | 0.586 ppb |
| 2020-01-14 | 0012856-01 | 0.548 ppb |
| 2020-04-02 | 0040688-01 | 0.794 ppb |
| 2020-04-02 | 0040688-02 | 0.904 ppb |
| 2020-07-28 | 0076012-02 | 2.08 ppb |
| 2020-07-28 | 0076012-01 | 2.02 ppb |
| 2020-10-06 | 0101407-02 | 1.87 ppb |
| 2020-10-06 | 0101407-01 | 1.59 ppb |
| 2021-01-19 | EA03321-02 | 1.30 ppb |
| 2021-01-19 | EA03321-01 | 1.16 ppb |
| 2021-04-12 | ED02486-01 | 0.882 ppb |
| 2021-04-12 | ED02486-02 | 1.07 ppb |
| 2021-07-01 | EG00377-01 | 1.84 ppb |
| 2021-07-01 | EG00377-02 | 2.06 ppb |
| 2021-10-12 | EJ02559-01 | 1.90 ppb |
| 2021-10-12 | EJ02559-02 | 1.80 ppb |
| 2022-01-05 | FA01072-02 | 1.40 ppb |
| 2022-01-05 | FA01072-01 | 1.33 ppb |
| 2022-04-11 | FD02070-01 | 0.944 ppb |
| 2022-04-11 | FD02070-02 | 0.972 ppb |
| 2022-07-12 | FG02145-01 | 2.14 ppb |
| 2022-07-12 | FG02145-02 | 2.16 ppb |
| 2022-10-10 | FJ01901-01 | 1.33 ppb |
| 2022-10-10 | FJ01901-02 | 1.53 ppb |
| 2023-01-04 | GA00884-01 | 0.934 ppb |
| 2023-01-04 | GA00884-02 | 0.976 ppb |
| 2023-04-03 | GD00733-01 | 0.787 ppb |
| 2023-04-03 | GD00733-02 | 0.864 ppb |
| 2023-07-06 | GG00841-01 | 1.17 ppb |
| 2023-07-06 | GG00841-02 | 1.12 ppb |
| 2023-10-04 | GJ01269-01 | 1.60 ppb |
| 2023-10-04 | GJ01269-02 | 1.57 ppb |