Dibromochloromethane
Covington Water District
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 | 0.0688 ppb | 8 | 1 | ND - 0.550 ppb |
| 2019 | 0.490 ppb | 9 | 7 | ND - 0.720 ppb |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | 0.463 ppb | 8 | 6 | ND - 0.690 ppb |
| 2022 | 0.404 ppb | 10 | 6 | ND - 0.860 ppb |
| 2023 | 0.308 ppb | 8 | 2 | ND - 1.33 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 |
|---|---|---|
| 2018-01-23 | ND | |
| 2018-01-23 | ND | |
| 2018-04-24 | ND | |
| 2018-04-24 | ND | |
| 2018-07-27 | ND | |
| 2018-07-27 | ND | |
| 2018-10-23 | 0.550 ppb | |
| 2018-10-23 | ND | |
| 2019-01-29 | 0.500 ppb | |
| 2019-01-29 | 0.610 ppb | |
| 2019-04-23 | 0.720 ppb | |
| 2019-04-23 | 0.590 ppb | |
| 2019-07-25 | 0.690 ppb | |
| 2019-07-25 | 0.710 ppb | |
| 2019-07-29 | ND | |
| 2019-10-29 | 0.590 ppb | |
| 2019-10-29 | ND | |
| 2021-01-27 | 4070621 | 0.550 ppb |
| 2021-01-27 | 4070622 | 0.680 ppb |
| 2021-04-27 | 4109473 | ND |
| 2021-04-28 | 4109477 | 0.590 ppb |
| 2021-07-27 | 4149070 | 0.540 ppb |
| 2021-07-27 | 4149069 | ND |
| 2021-10-26 | 4198433 | 0.690 ppb |
| 2021-10-26 | 4198434 | 0.650 ppb |
| 2022-01-25 | 4234234 | ND |
| 2022-01-25 | 4234238 | ND |
| 2022-04-26 | 4278919 | 0.530 ppb |
| 2022-04-26 | 4278920 | ND |
| 2022-06-14 | 4298836 | 0.860 ppb |
| 2022-07-26 | 4363807 | 0.500 ppb |
| 2022-07-26 | 4363806 | ND |
| 2022-10-25 | 4374865 | 0.730 ppb |
| 2022-10-25 | 4374862 | 0.740 ppb |
| 2022-10-25 | 4382877 | 0.680 ppb |
| 2023-01-24 | 4408725 | ND |
| 2023-01-24 | 4408726 | ND |
| 2023-04-25 | 4452805 | ND |
| 2023-04-25 | 4452806 | ND |
| 2023-07-25 | 4505722 | ND |
| 2023-07-25 | 4505721 | ND |
| 2023-10-24 | 4548859 | 1.13 ppb |
| 2023-10-24 | 4548860 | 1.33 ppb |