Dibromochloromethane
Fife Department Of Public Works
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 | 0.110 ppb | 6 | 1 | ND - 0.660 ppb |
| 2019 | 0.505 ppb | 8 | 6 | ND - 0.870 ppb |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | 0.615 ppb | 8 | 5 | ND - 1.60 ppb |
| 2022 | 0.320 ppb | 8 | 4 | ND - 0.680 ppb |
| 2023 | 0.710 ppb | 8 | 4 | ND - 2.19 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 |
|---|---|---|
| 2018-01-18 | ND | |
| 2018-01-18 | ND | |
| 2018-04-17 | ND | |
| 2018-04-17 | ND | |
| 2018-10-16 | 0.660 ppb | |
| 2018-10-16 | ND | |
| 2019-01-17 | 0.610 ppb | |
| 2019-01-17 | 0.640 ppb | |
| 2019-04-16 | ND | |
| 2019-04-16 | ND | |
| 2019-07-16 | 0.680 ppb | |
| 2019-07-16 | 0.870 ppb | |
| 2019-10-16 | 0.610 ppb | |
| 2019-10-16 | 0.630 ppb | |
| 2021-01-12 | 4062998 | ND |
| 2021-01-12 | 4062999 | 0.580 ppb |
| 2021-04-14 | 4102469 | ND |
| 2021-04-14 | 4102470 | ND |
| 2021-07-14 | 4149194 | 1.08 ppb |
| 2021-07-14 | 4149191 | 1.60 ppb |
| 2021-10-12 | 4196552 | 0.820 ppb |
| 2021-10-12 | 4196553 | 0.840 ppb |
| 2022-01-19 | 4234222 | ND |
| 2022-01-19 | 4234224 | ND |
| 2022-04-14 | 4274905 | ND |
| 2022-04-14 | 4274906 | ND |
| 2022-07-13 | 4322180 | 0.570 ppb |
| 2022-07-13 | 4322181 | 0.640 ppb |
| 2022-10-19 | 4374844 | 0.670 ppb |
| 2022-10-19 | 4374847 | 0.680 ppb |
| 2023-01-18 | 4408724 | ND |
| 2023-01-18 | 4408723 | ND |
| 2023-04-19 | 4444281 | ND |
| 2023-04-19 | 4444284 | ND |
| 2023-07-19 | 4489468 | 2.14 ppb |
| 2023-07-19 | 4489469 | 2.19 ppb |
| 2023-10-17 | 4548857 | 0.650 ppb |
| 2023-10-17 | 4548856 | 0.700 ppb |