Bromodichloromethane
Ascot Park Apartments
Bromodichloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromodichloromethane 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 | 0.609 ppb | 2 | 2 | 0.266 ppb - 0.952 ppb |
| 2019 | 4.21 ppb | 1 | 1 | 4.21 ppb |
| 2020 | 0.352 ppb | 5 | 5 | 0.172 ppb - 0.604 ppb |
| 2021 | 0.324 ppb | 3 | 3 | 0.162 ppb - 0.444 ppb |
| 2022 | 0.395 ppb | 4 | 4 | 0.323 ppb - 0.490 ppb |
| 2023 | 0.463 ppb | 3 | 2 | ND - 0.761 ppb |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 0.06 ppb
The EWG Health Guideline of 0.06 ppb for bromodichloromethane 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 |
|---|---|---|
| 2018-07-30 | 8071207-01 | 0.266 ppb |
| 2018-08-29 | 8081213-01 | 0.952 ppb |
| 2019-08-20 | 9080949-01 | 4.21 ppb |
| 2020-01-23 | 0010933-01 | 0.209 ppb |
| 2020-04-16 | 0040640-01 | 0.342 ppb |
| 2020-07-08 | 0070382-01 | 0.604 ppb |
| 2020-08-11 | 0080439-01 | 0.433 ppb |
| 2020-10-08 | 0100398-01 | 0.172 ppb |
| 2021-01-27 | 1011143-01 | 0.444 ppb |
| 2021-07-20 | 1070927-01 | 0.162 ppb |
| 2021-08-04 | 1080294-01 | 0.366 ppb |
| 2022-04-26 | 2041189-01 | 0.323 ppb |
| 2022-07-12 | 2070479-01 | 0.392 ppb |
| 2022-08-03 | 2080214-01 | 0.490 ppb |
| 2022-10-12 | 2100504-01 | 0.373 ppb |
| 2023-01-09 | 23A0400-01 | 0.627 ppb |
| 2023-07-19 | 23G0966-01 | 0.761 ppb |
| 2023-08-02 | 23H0163-01 | ND |