Dibromochloromethane
Newbern Heights
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 | 0.640 ppb | 2 | 2 | 0.550 ppb - 0.730 ppb |
| 2019 | 0.198 ppb | 4 | 2 | ND - 0.510 ppb |
| 2020 | ND | 4 | 0 | ND |
| 2021 | 0.200 ppb | 4 | 1 | ND - 0.800 ppb |
| 2022 | ND | 3 | 0 | ND |
| 2023 | 0.148 ppb | 4 | 1 | ND - 0.590 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 |
|---|---|---|
| 2018-08-16 | 18082775-01A | 0.730 ppb |
| 2018-11-15 | 18112345-01A | 0.550 ppb |
| 2019-02-14 | 19022004-01A | 0.280 ppb |
| 2019-05-16 | 19052478-01A | ND |
| 2019-08-15 | 19082123-01A | ND |
| 2019-12-05 | 7310618002 | 0.510 ppb |
| 2020-02-10 | 20-01145-TTHM | ND |
| 2020-05-11 | 20-03726-TTHM | ND |
| 2020-08-21 | 20-07138 | ND |
| 2020-11-16 | 4779392 | ND |
| 2021-02-26 | 21-01691 THM | ND |
| 2021-05-10 | 4900956 | ND |
| 2021-08-19 | 4997546 | 0.800 ppb |
| 2021-11-16 | 810-8117-1T | ND |
| 2022-02-18 | 810-16031-1 | ND |
| 2022-05-20 | 810-25940-1 | ND |
| 2022-08-22 | 810-35519-A-1 | ND |
| 2023-02-21 | 810-54659-B-1 | ND |
| 2023-05-16 | 810-63727-B-1 | 0.590 ppb |
| 2023-08-15 | 810-74442-D-1 | ND |
| 2023-11-14 | 810-85536-C-1 | ND |