Dibromochloromethane
Huttig Waterworks
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 | 1.09 ppb | 5 | 5 | 0.336 ppb - 2.70 ppb |
| 2019 | 0.667 ppb | 8 | 6 | ND - 1.32 ppb |
| 2020 | 0.947 ppb | 4 | 3 | ND - 2.60 ppb |
| 2021 | 0.392 ppb | 4 | 2 | ND - 1.50 ppb |
| 2022 | ND | 3 | 0 | ND |
| 2023 | 1.47 ppb | 2 | 1 | ND - 2.93 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 |
|---|---|---|
| 2018-02-27 | 18060003201 | 0.840 ppb |
| 2018-05-01 | 18123006103 | 0.336 ppb |
| 2018-06-18 | 18172001002 | 2.70 ppb |
| 2018-10-29 | 18305001203 | 0.847 ppb |
| 2018-10-29 | 18305001209 | 0.710 ppb |
| 2019-01-28 | 19031001001 | ND |
| 2019-01-28 | 19031001109 | 0.610 ppb |
| 2019-01-28 | 19031001103 | 0.757 ppb |
| 2019-05-01 | 19121003303 | ND |
| 2019-05-01 | 19121003308 | 0.610 ppb |
| 2019-07-15 | 19198002202 | 1.10 ppb |
| 2019-09-03 | 19248002109 | 0.940 ppb |
| 2019-09-03 | 19248002103 | 1.32 ppb |
| 2020-01-28 | 20030005101 | 0.658 ppb |
| 2020-01-28 | 20030005107 | 0.530 ppb |
| 2020-06-16 | 20170003902 | ND |
| 2020-08-31 | 20247003202 | 2.60 ppb |
| 2021-01-27 | 21028015001 | ND |
| 2021-05-19 | 21140004502 | ND |
| 2021-09-08 | 21252002302 | 1.50 ppb |
| 2021-11-17 | 21322001003 | 0.0664 ppb |
| 2022-01-24 | 22027007501 | ND |
| 2022-05-23 | O198471-VOC-1 | ND |
| 2022-09-07 | O201433-THM-1 | ND |
| 2023-02-14 | O206558-EDB-1 | ND |
| 2023-09-06 | O211815-THM-1 | 2.93 ppb |