Bromodichloromethane
Connecticut Water Company - Hebron Center Division
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 | 2.20 ppb | 2 | 2 | 1.80 ppb - 2.60 ppb |
| 2019 | 2.25 ppb | 2 | 2 | 1.50 ppb - 3.00 ppb |
| 2020 | 3.20 ppb | 2 | 2 | 1.50 ppb - 4.90 ppb |
| 2021 | 2.33 ppb | 3 | 3 | 1.30 ppb - 4.40 ppb |
| 2022 | 1.63 ppb | 5 | 5 | 0.890 ppb - 3.50 ppb |
| 2023 | 1.48 ppb | 6 | 6 | 0.940 ppb - 3.30 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 |
|---|---|---|
| 2018-04-09 | CA16134VOC1 | 1.80 ppb |
| 2018-08-20 | CB14584 | 2.60 ppb |
| 2019-02-11 | VOC1 200521212 | 1.50 ppb |
| 2019-08-07 | DBP 200543766 | 3.00 ppb |
| 2020-08-21 | DBP 200587595 | 4.90 ppb |
| 2020-09-21 | VOC1 200591010 | 1.50 ppb |
| 2021-08-18 | DBP 200629178 | 4.40 ppb |
| 2021-08-31 | 300048791 300048800 | 1.30 ppb |
| 2021-10-25 | V300088205 300088206 | 1.30 ppb |
| 2022-01-13 | CK16254 | 0.890 ppb |
| 2022-04-21 | CL13693 | 1.40 ppb |
| 2022-07-07 | CL72297 | 1.40 ppb |
| 2022-08-18 | CM08954 | 3.50 ppb |
| 2022-10-18 | CM65668 | 0.980 ppb |
| 2023-01-12 | CN22972 | 0.940 ppb |
| 2023-04-17 | CN85298 | 1.40 ppb |
| 2023-08-15 | CO75345 | 1.10 ppb |
| 2023-08-21 | CO79325 | 3.30 ppb |
| 2023-10-17 | CP28039 | 1.20 ppb |
| 2023-10-24 | CP33075 | 0.950 ppb |