Dibromochloromethane
Lewistown Boro Municipal Authority
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 | 0.820 ppb | 8 | 8 | 0.670 ppb - 1.03 ppb |
| 2019 | 0.408 ppb | 8 | 5 | ND - 0.930 ppb |
| 2020 | 0.460 ppb | 8 | 5 | ND - 1.01 ppb |
| 2021 | 0.324 ppb | 8 | 4 | ND - 0.830 ppb |
| 2022 | 0.492 ppb | 12 | 10 | ND - 0.700 ppb |
| 2023 | 0.257 ppb | 12 | 5 | ND - 0.710 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 |
|---|---|---|
| 2018-02-15 | 8B15207-02 | 0.830 ppb |
| 2018-02-15 | 8B15207-01 | 0.670 ppb |
| 2018-05-15 | 8E16058-01 | 0.880 ppb |
| 2018-05-15 | 8E16058-02 | 0.680 ppb |
| 2018-08-14 | 8H14149-01 | 0.930 ppb |
| 2018-08-14 | 8H14149-02 | 0.720 ppb |
| 2018-11-13 | 8K13111-01 | 1.03 ppb |
| 2018-11-13 | 8K13111-02 | 0.820 ppb |
| 2019-02-14 | 9B14172-01 | 0.930 ppb |
| 2019-02-14 | 9B14172-02 | 0.580 ppb |
| 2019-05-16 | 9E16191-01 | 0.520 ppb |
| 2019-05-16 | 9E16191-02 | ND |
| 2019-08-15 | 9H15268-01 | ND |
| 2019-08-15 | 9H15268-02 | ND |
| 2019-11-14 | 9K15049-02 | 0.540 ppb |
| 2019-11-14 | 9K15049-01 | 0.690 ppb |
| 2020-02-13 | ND | |
| 2020-02-13 | 0.630 ppb | |
| 2020-05-14 | ND | |
| 2020-05-14 | 0.690 ppb | |
| 2020-08-13 | ND | |
| 2020-08-13 | 0.720 ppb | |
| 2020-11-12 | 0.630 ppb | |
| 2020-11-12 | 1.01 ppb | |
| 2021-02-11 | 0.530 ppb | |
| 2021-02-11 | ND | |
| 2021-05-13 | 0.830 ppb | |
| 2021-05-13 | 0.660 ppb | |
| 2021-08-12 | ND | |
| 2021-08-12 | ND | |
| 2021-11-11 | 0.570 ppb | |
| 2021-11-11 | ND | |
| 2022-02-17 | 0.620 ppb | |
| 2022-02-17 | 0.520 ppb | |
| 2022-05-12 | 0.640 ppb | |
| 2022-05-12 | 0.510 ppb | |
| 2022-08-11 | 0.570 ppb | |
| 2022-08-11 | ND | |
| 2022-08-11 | ND | |
| 2022-08-11 | 0.510 ppb | |
| 2022-11-15 | 0.610 ppb | |
| 2022-11-15 | 0.700 ppb | |
| 2022-11-15 | 0.520 ppb | |
| 2022-11-15 | 0.700 ppb | |
| 2023-02-16 | ND | |
| 2023-02-16 | ND | |
| 2023-02-16 | 0.610 ppb | |
| 2023-02-16 | 0.520 ppb | |
| 2023-05-11 | ND | |
| 2023-05-11 | 0.650 ppb | |
| 2023-05-11 | ND | |
| 2023-05-11 | ND | |
| 2023-08-17 | 0.710 ppb | |
| 2023-08-17 | ND | |
| 2023-11-16 | 0.590 ppb | |
| 2023-11-16 | ND |