Dibromochloromethane
City of Aberdeen
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 | 0.577 ppb | 6 | 4 | ND - 1.10 ppb |
| 2019 | 0.760 ppb | 8 | 8 | 0.540 ppb - 1.01 ppb |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | 0.733 ppb | 8 | 7 | ND - 1.05 ppb |
| 2022 | 0.699 ppb | 8 | 7 | ND - 1.14 ppb |
| 2023 | 0.753 ppb | 9 | 8 | ND - 1.09 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 |
|---|---|---|
| 2018-02-20 | 1.10 ppb | |
| 2018-02-20 | 1.000 ppb | |
| 2018-05-15 | 0.680 ppb | |
| 2018-05-15 | 0.680 ppb | |
| 2018-08-14 | ND | |
| 2018-08-14 | ND | |
| 2019-02-28 | 0.740 ppb | |
| 2019-02-28 | 0.890 ppb | |
| 2019-05-06 | 0.960 ppb | |
| 2019-05-06 | 1.01 ppb | |
| 2019-08-13 | 0.540 ppb | |
| 2019-08-13 | 0.580 ppb | |
| 2019-11-18 | 0.670 ppb | |
| 2019-11-18 | 0.690 ppb | |
| 2021-02-16 | 4074660 | 1.05 ppb |
| 2021-02-16 | 4080617 | 0.920 ppb |
| 2021-05-25 | 4126096 | 0.870 ppb |
| 2021-05-25 | 4126095 | 0.820 ppb |
| 2021-08-31 | 4179828 | 0.750 ppb |
| 2021-08-31 | 4179827 | 0.720 ppb |
| 2021-11-22 | 4207545 | ND |
| 2021-11-22 | 4207548 | 0.730 ppb |
| 2022-02-22 | 4249230 | 1.14 ppb |
| 2022-02-25 | 4249228 | 1.12 ppb |
| 2022-05-17 | 4286833 | 0.680 ppb |
| 2022-05-17 | 4286832 | 0.790 ppb |
| 2022-08-16 | 4363944 | 0.540 ppb |
| 2022-08-16 | 4363947 | 0.560 ppb |
| 2022-11-30 | 4384653 | ND |
| 2022-11-30 | 4384652 | 0.760 ppb |
| 2023-02-21 | 4423043 | 0.940 ppb |
| 2023-02-21 | 4423044 | 1.08 ppb |
| 2023-05-23 | 4466301 | 1.09 ppb |
| 2023-05-23 | 4466302 | 1.05 ppb |
| 2023-08-15 | 4516792 | 0.660 ppb |
| 2023-08-15 | 4516793 | 0.660 ppb |
| 2023-09-19 | 4521699 | ND |
| 2023-11-21 | 4555693 | 0.630 ppb |
| 2023-11-21 | 4555692 | 0.670 ppb |