Dibromochloromethane
Litchfield
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 | 0.797 ppb | 8 | 8 | 0.570 ppb - 1.01 ppb |
| 2019 | 0.958 ppb | 8 | 6 | ND - 2.45 ppb |
| 2020 | 1.25 ppb | 5 | 5 | 0.891 ppb - 1.91 ppb |
| 2021 | 0.461 ppb | 8 | 5 | ND - 0.844 ppb |
| 2022 | 0.288 ppb | 8 | 4 | ND - 0.652 ppb |
| 2023 | 1.07 ppb | 8 | 6 | ND - 2.22 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 |
|---|---|---|
| 2018-02-06 | 8020957-01 | 0.570 ppb |
| 2018-02-06 | 8020957-02 | 0.633 ppb |
| 2018-05-01 | 8050769-01 | 0.680 ppb |
| 2018-05-01 | 8050769-02 | 0.685 ppb |
| 2018-08-01 | 8080775-01 | 0.934 ppb |
| 2018-08-01 | 8080775-02 | 1.01 ppb |
| 2018-11-06 | 8111779-02 | 0.945 ppb |
| 2018-11-06 | 8111779-01 | 0.919 ppb |
| 2019-02-05 | 9021262-01 | ND |
| 2019-02-05 | 9021262-02 | ND |
| 2019-05-01 | 9050767-01 | 0.533 ppb |
| 2019-05-01 | 9050767-02 | 0.541 ppb |
| 2019-08-07 | 9082098-02 | 0.942 ppb |
| 2019-08-07 | 9082098-01 | 0.970 ppb |
| 2019-11-06 | 9111584-01 | 2.23 ppb |
| 2019-11-06 | 9111584-02 | 2.45 ppb |
| 2020-05-06 | 0051493-01 | 0.891 ppb |
| 2020-08-05 | 0081558-02 | 1.91 ppb |
| 2020-08-05 | 0081558-01 | 1.50 ppb |
| 2020-11-04 | 0111260-02 | 0.940 ppb |
| 2020-11-04 | 0111260-01 | 1.03 ppb |
| 2021-02-03 | EB01216-02 | 0.777 ppb |
| 2021-02-03 | EB01216-01 | 0.844 ppb |
| 2021-05-05 | EE01382-01 | ND |
| 2021-05-05 | EE01382-02 | 0.565 ppb |
| 2021-08-04 | EH01605-01 | 0.731 ppb |
| 2021-08-04 | EH01605-02 | 0.773 ppb |
| 2021-11-03 | EK01313-02 | ND |
| 2021-11-03 | EK01313-01 | ND |
| 2022-02-02 | FB00685-02 | ND |
| 2022-02-02 | FB00685-01 | ND |
| 2022-05-04 | FE01277-01 | 0.527 ppb |
| 2022-05-04 | FE01277-02 | ND |
| 2022-08-10 | FH02794-01 | ND |
| 2022-08-10 | FH02794-02 | 0.538 ppb |
| 2022-11-02 | FK00992-01 | 0.652 ppb |
| 2022-11-02 | FK00992-02 | 0.589 ppb |
| 2023-02-01 | GB00492-01 | ND |
| 2023-02-01 | GB00492-02 | ND |
| 2023-05-03 | GE01151-01 | 0.821 ppb |
| 2023-05-03 | GE01151-02 | 1.29 ppb |
| 2023-08-02 | GH00977-01 | 2.22 ppb |
| 2023-08-02 | GH00977-02 | 1.44 ppb |
| 2023-11-01 | GK00542-01 | 1.51 ppb |
| 2023-11-01 | GK00542-02 | 1.27 ppb |