Bromodichloromethane
City of Jamestown
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 | 0.385 ppb | 8 | 5 | ND - 0.670 ppb |
| 2019 | 0.611 ppb | 8 | 7 | ND - 0.940 ppb |
| 2020 | 0.359 ppb | 8 | 5 | ND - 0.620 ppb |
| 2021 | 0.639 ppb | 8 | 7 | ND - 1.07 ppb |
| 2022 | 0.534 ppb | 8 | 6 | ND - 0.990 ppb |
| 2023 | 0.600 ppb | 8 | 7 | ND - 0.850 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 |
|---|---|---|
| 2018-01-17 | 18-S78 | ND |
| 2018-01-17 | 18-S77 | ND |
| 2018-04-16 | 18-S524 | 0.640 ppb |
| 2018-04-16 | 18-S525 | 0.670 ppb |
| 2018-07-18 | 18-S1193 | ND |
| 2018-07-18 | 18-S1194 | 0.580 ppb |
| 2018-10-15 | 18-S2261 | 0.660 ppb |
| 2018-10-15 | 18-S2262 | 0.530 ppb |
| 2019-01-15 | 19-S45 | 0.500 ppb |
| 2019-01-15 | 19-S44 | ND |
| 2019-04-16 | 19-S436 | 0.650 ppb |
| 2019-04-16 | 19-S435 | 0.540 ppb |
| 2019-07-15 | 19-S1129 | 0.550 ppb |
| 2019-07-15 | 19-S1128 | 0.780 ppb |
| 2019-10-14 | 19-S2322 | 0.930 ppb |
| 2019-10-14 | 19-S2323 | 0.940 ppb |
| 2020-01-13 | 360270 | ND |
| 2020-01-13 | 360269 | 0.540 ppb |
| 2020-04-13 | 363076 | 0.620 ppb |
| 2020-04-13 | 363075 | 0.500 ppb |
| 2020-07-21 | 368566 | 0.610 ppb |
| 2020-07-21 | 369616 | ND |
| 2020-10-13 | 372361 | ND |
| 2020-10-13 | 372362 | 0.600 ppb |
| 2021-01-12 | 375910 | 1.07 ppb |
| 2021-01-12 | 375909 | ND |
| 2021-04-13 | 378786 | 0.640 ppb |
| 2021-04-13 | 378787 | 0.710 ppb |
| 2021-07-20 | 383413 | 0.500 ppb |
| 2021-07-20 | 383414 | 0.670 ppb |
| 2021-10-11 | 389102 | 0.770 ppb |
| 2021-10-11 | 389101 | 0.750 ppb |
| 2022-01-11 | 391189 | 0.550 ppb |
| 2022-01-11 | 391192 | 0.640 ppb |
| 2022-04-11 | 394226 | ND |
| 2022-04-11 | 394225 | ND |
| 2022-07-19 | 398432 | 0.990 ppb |
| 2022-07-19 | 398434 | 0.870 ppb |
| 2022-10-04 | 402560 | 0.650 ppb |
| 2022-10-04 | 402561 | 0.570 ppb |
| 2023-01-10 | 405840 | 0.620 ppb |
| 2023-01-10 | 405841 | 0.670 ppb |
| 2023-04-19 | 410089 | 0.670 ppb |
| 2023-04-19 | 410088 | ND |
| 2023-07-25 | 415064 | 0.560 ppb |
| 2023-07-25 | 415063 | 0.850 ppb |
| 2023-10-10 | 418632 | 0.600 ppb |
| 2023-10-10 | 418633 | 0.830 ppb |