Bromochloromethane
Harris County Water Control and Improvement District 89
Bromochloromethane is a tap water disinfection byproduct; it is also used as an intermediate in chemical manufacturing and as a fire extinguishing agent. Disinfection byproducts in drinking water increase the risk of cancer.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | 0.00231 ppb | 52 | 1 | ND - 0.120 ppb |
| 2014 | ND | 51 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 2 | 0 | ND |
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 bromochloromethane was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer, harm to reproduction and child development, and change to fetal growth and development.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-01-29 | AE11016 | ND |
| 2018-08-06 | AE35876 | ND |
| 2019-02-19 | AE54852 | ND |
| 2019-02-19 | AE54888 | ND |
| 2020-01-22 | AE94706 | ND |
| 2020-04-22 | AF07674 | ND |
| 2020-07-29 | AF21142 | ND |
| 2020-10-22 | AF31675 | ND |
| 2021-02-23 | AF43937 | ND |
| 2021-04-22 | AF51136 | ND |
| 2022-01-31 | AF82569 | ND |
| 2022-01-31 | AF82573 | ND |
| 2023-03-07 | Q2309824001 | ND |
| 2023-04-27 | AG38464 | ND |