Dibromochloromethane
Southwood Water System
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 | 0.244 ppb | 12 | 4 | ND - 1.000 ppb |
| 2019 | 0.297 ppb | 15 | 7 | ND - 0.730 ppb |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | 0.308 ppb | 11 | 4 | ND - 0.960 ppb |
| 2022 | 0.193 ppb | 17 | 4 | ND - 0.960 ppb |
| 2023 | 0.504 ppb | 11 | 8 | ND - 0.950 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 |
|---|---|---|
| 2018-02-14 | 0.600 ppb | |
| 2018-02-14 | 1.000 ppb | |
| 2018-03-14 | ND | |
| 2018-03-14 | ND | |
| 2018-05-04 | ND | |
| 2018-05-15 | 0.760 ppb | |
| 2018-05-15 | ND | |
| 2018-07-19 | ND | |
| 2018-08-21 | 0.570 ppb | |
| 2018-08-21 | ND | |
| 2018-11-15 | ND | |
| 2018-11-15 | ND | |
| 2019-02-08 | ND | |
| 2019-02-08 | 0.520 ppb | |
| 2019-05-21 | 0.730 ppb | |
| 2019-05-21 | 0.700 ppb | |
| 2019-06-26 | ND | |
| 2019-07-12 | ND | |
| 2019-07-12 | ND | |
| 2019-09-05 | 0.500 ppb | |
| 2019-09-05 | ND | |
| 2019-09-05 | 0.690 ppb | |
| 2019-10-15 | ND | |
| 2019-11-13 | 0.680 ppb | |
| 2019-11-13 | 0.640 ppb | |
| 2019-12-05 | ND | |
| 2019-12-05 | ND | |
| 2021-02-17 | 4085721 | ND |
| 2021-02-17 | 4081091 | ND |
| 2021-03-12 | 4166774 | ND |
| 2021-03-12 | 4164633 | ND |
| 2021-03-17 | 4205286 | ND |
| 2021-05-24 | 4129435 | 0.750 ppb |
| 2021-05-24 | 4129436 | ND |
| 2021-08-11 | 4166473 | 0.870 ppb |
| 2021-08-11 | 4166472 | ND |
| 2021-11-10 | 4208525 | 0.960 ppb |
| 2021-11-10 | 4208526 | 0.810 ppb |
| 2022-01-26 | 4240240 | ND |
| 2022-01-26 | 4240241 | ND |
| 2022-01-26 | 4240242 | ND |
| 2022-01-27 | 4240239 | ND |
| 2022-02-04 | 4240244 | ND |
| 2022-02-04 | 4258009 | 0.530 ppb |
| 2022-02-04 | 4258007 | ND |
| 2022-02-04 | 4240245 | ND |
| 2022-08-11 | 4359393 | 0.960 ppb |
| 2022-08-15 | 4359413 | 0.930 ppb |
| 2022-10-11 | 4465087 | ND |
| 2022-10-17 | 4370660 | ND |
| 2022-10-31 | 4465043 | ND |
| 2022-10-31 | 4464989 | ND |
| 2022-11-08 | 4374813 | ND |
| 2022-11-08 | 4374812 | 0.860 ppb |
| 2022-11-14 | 4382866 | ND |
| 2023-02-14 | 4416402 | 0.610 ppb |
| 2023-02-14 | 4416403 | ND |
| 2023-03-14 | 4437411 | ND |
| 2023-03-14 | 4437441 | 0.500 ppb |
| 2023-07-17 | 4488215 | 0.770 ppb |
| 2023-07-17 | 4488218 | 0.950 ppb |
| 2023-08-07 | 4505601 | 0.540 ppb |
| 2023-08-14 | 4505562 | 0.860 ppb |
| 2023-09-26 | 4532910 | ND |
| 2023-11-13 | 4569051 | 0.680 ppb |
| 2023-11-27 | 4569040 | 0.630 ppb |