Dibromochloromethane
Altoona Water 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 | 1.36 ppb | 32 | 32 | 0.610 ppb - 2.13 ppb |
| 2019 | 1.66 ppb | 32 | 31 | ND - 2.62 ppb |
| 2020 | 1.42 ppb | 32 | 32 | 0.510 ppb - 2.24 ppb |
| 2021 | 1.11 ppb | 32 | 31 | ND - 2.07 ppb |
| 2022 | 1.16 ppb | 20 | 20 | 0.520 ppb - 1.82 ppb |
| 2023 | 1.10 ppb | 32 | 29 | ND - 2.32 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 |
|---|---|---|
| 2018-02-13 | 8B13050-01 | 1.28 ppb |
| 2018-02-13 | 8B13050-02 | 0.610 ppb |
| 2018-02-13 | 8B13050-03 | 0.880 ppb |
| 2018-02-13 | 8B13050-04 | 1.58 ppb |
| 2018-02-13 | 8B13050-05 | 0.950 ppb |
| 2018-02-13 | 8B13050-06 | 1.42 ppb |
| 2018-02-13 | 8B13050-07 | 1.08 ppb |
| 2018-02-13 | 8B13050-08 | 1.17 ppb |
| 2018-05-15 | 8E15174-01 | 1.63 ppb |
| 2018-05-15 | 8E15174-02 | 0.710 ppb |
| 2018-05-15 | 8E15174-03 | 1.45 ppb |
| 2018-05-15 | 8E15174-04 | 1.82 ppb |
| 2018-05-15 | 8E15174-05 | 1.27 ppb |
| 2018-05-15 | 8E15174-06 | 1.94 ppb |
| 2018-05-15 | 8E15174-07 | 1.39 ppb |
| 2018-05-15 | 8E15174-08 | 1.68 ppb |
| 2018-08-15 | 8H15062-01 | 1.67 ppb |
| 2018-08-15 | 8H15062-02 | 1.45 ppb |
| 2018-08-15 | 8H15062-03 | 1.28 ppb |
| 2018-08-15 | 8H15062-04 | 1.52 ppb |
| 2018-08-15 | 8H15062-05 | 1.32 ppb |
| 2018-08-15 | 8H15062-06 | 1.46 ppb |
| 2018-08-15 | 8H15062-07 | 1.27 ppb |
| 2018-08-15 | 8H15062-08 | 1.47 ppb |
| 2018-11-14 | 8K14050-01 | 1.46 ppb |
| 2018-11-14 | 8K14050-02 | 1.18 ppb |
| 2018-11-14 | 8K14050-03 | 1.15 ppb |
| 2018-11-14 | 8K14050-04 | 2.13 ppb |
| 2018-11-14 | 8K14050-05 | 1.27 ppb |
| 2018-11-14 | 8K14050-06 | 1.57 ppb |
| 2018-11-14 | 8K14050-07 | 1.58 ppb |
| 2018-11-14 | 8K14050-08 | 0.970 ppb |
| 2019-02-14 | 9B14162-01 | 1.11 ppb |
| 2019-02-14 | 9B14162-02 | ND |
| 2019-02-14 | 9B14162-03 | 1.19 ppb |
| 2019-02-14 | 9B14162-04 | 1.61 ppb |
| 2019-02-14 | 9B14162-05 | 1.42 ppb |
| 2019-02-14 | 9B14162-06 | 0.620 ppb |
| 2019-02-14 | 9B14162-07 | 1.18 ppb |
| 2019-02-14 | 9B14162-08 | 1.18 ppb |
| 2019-05-15 | 9E15064-01 | 2.01 ppb |
| 2019-05-15 | 9E15064-02 | 1.53 ppb |
| 2019-05-15 | 9E15064-03 | 1.37 ppb |
| 2019-05-15 | 9E15064-04 | 2.10 ppb |
| 2019-05-15 | 9E15064-05 | 1.58 ppb |
| 2019-05-15 | 9E15064-06 | 1.45 ppb |
| 2019-05-15 | 9E15064-07 | 1.24 ppb |
| 2019-05-15 | 9E15064-08 | 1.44 ppb |
| 2019-08-14 | 9H14123-01 | 2.16 ppb |
| 2019-08-14 | 9H14123-02 | 1.74 ppb |
| 2019-08-14 | 9H14123-03 | 1.82 ppb |
| 2019-08-14 | 9H14123-04 | 2.62 ppb |
| 2019-08-14 | 9H14123-05 | 2.17 ppb |
| 2019-08-14 | 9H14123-06 | 2.07 ppb |
| 2019-08-14 | 9H14123-07 | 2.16 ppb |
| 2019-08-14 | 9H14123-08 | 2.37 ppb |
| 2019-11-14 | 9K14096-01 | 2.03 ppb |
| 2019-11-14 | 9K14096-02 | 1.48 ppb |
| 2019-11-14 | 9K14096-03 | 1.55 ppb |
| 2019-11-14 | 9K14096-04 | 2.41 ppb |
| 2019-11-14 | 9K14096-05 | 1.45 ppb |
| 2019-11-14 | 9K14096-06 | 1.97 ppb |
| 2019-11-14 | 9K14096-07 | 2.12 ppb |
| 2019-11-14 | 9K14096-08 | 1.89 ppb |
| 2020-02-13 | 1.18 ppb | |
| 2020-02-13 | 0.710 ppb | |
| 2020-02-13 | 0.940 ppb | |
| 2020-02-13 | 1.39 ppb | |
| 2020-02-13 | 0.800 ppb | |
| 2020-02-13 | 1.13 ppb | |
| 2020-02-13 | 1.33 ppb | |
| 2020-02-13 | 1.25 ppb | |
| 2020-05-14 | 1.65 ppb | |
| 2020-05-14 | 0.510 ppb | |
| 2020-05-14 | 1.51 ppb | |
| 2020-05-14 | 1.46 ppb | |
| 2020-05-14 | 0.790 ppb | |
| 2020-05-14 | 2.10 ppb | |
| 2020-05-14 | 0.780 ppb | |
| 2020-05-14 | 1.73 ppb | |
| 2020-08-13 | 1.77 ppb | |
| 2020-08-13 | 1.02 ppb | |
| 2020-08-13 | 1.54 ppb | |
| 2020-08-13 | 1.68 ppb | |
| 2020-08-13 | 1.22 ppb | |
| 2020-08-13 | 1.80 ppb | |
| 2020-08-13 | 1.45 ppb | |
| 2020-08-13 | 1.88 ppb | |
| 2020-11-12 | 1.78 ppb | |
| 2020-11-12 | 1.01 ppb | |
| 2020-11-12 | 1.44 ppb | |
| 2020-11-12 | 2.24 ppb | |
| 2020-11-12 | 1.57 ppb | |
| 2020-11-12 | 1.97 ppb | |
| 2020-11-12 | 1.97 ppb | |
| 2020-11-12 | 1.84 ppb | |
| 2021-02-11 | 0.870 ppb | |
| 2021-02-11 | ND | |
| 2021-02-11 | 0.520 ppb | |
| 2021-02-11 | 1.06 ppb | |
| 2021-02-11 | 0.930 ppb | |
| 2021-02-11 | 1.16 ppb | |
| 2021-02-11 | 0.870 ppb | |
| 2021-02-11 | 0.870 ppb | |
| 2021-05-12 | 0.810 ppb | |
| 2021-05-13 | 1.78 ppb | |
| 2021-05-13 | 0.510 ppb | |
| 2021-05-13 | 0.920 ppb | |
| 2021-05-13 | 1.97 ppb | |
| 2021-05-13 | 0.870 ppb | |
| 2021-05-13 | 0.810 ppb | |
| 2021-05-13 | 1.000 ppb | |
| 2021-08-12 | 1.54 ppb | |
| 2021-08-12 | 0.780 ppb | |
| 2021-08-12 | 1.44 ppb | |
| 2021-08-12 | 2.07 ppb | |
| 2021-08-12 | 1.23 ppb | |
| 2021-08-12 | 1.53 ppb | |
| 2021-08-12 | 1.46 ppb | |
| 2021-08-12 | 1.86 ppb | |
| 2021-11-15 | 1.38 ppb | |
| 2021-11-15 | 1.23 ppb | |
| 2021-11-15 | 1.04 ppb | |
| 2021-11-15 | 1.54 ppb | |
| 2021-11-15 | 0.830 ppb | |
| 2021-11-15 | 0.750 ppb | |
| 2021-11-15 | 1.19 ppb | |
| 2021-11-15 | 0.600 ppb | |
| 2022-02-16 | 0.650 ppb | |
| 2022-02-16 | 0.660 ppb | |
| 2022-02-16 | 1.09 ppb | |
| 2022-02-16 | 1.82 ppb | |
| 2022-05-09 | 1.10 ppb | |
| 2022-05-09 | 0.930 ppb | |
| 2022-05-09 | 1.43 ppb | |
| 2022-05-09 | 1.29 ppb | |
| 2022-08-15 | 1.51 ppb | |
| 2022-08-15 | 1.27 ppb | |
| 2022-08-15 | 1.28 ppb | |
| 2022-08-15 | 0.840 ppb | |
| 2022-11-15 | 1.51 ppb | |
| 2022-11-15 | 1.58 ppb | |
| 2022-11-15 | 1.09 ppb | |
| 2022-11-15 | 1.70 ppb | |
| 2022-11-15 | 1.06 ppb | |
| 2022-11-15 | 0.630 ppb | |
| 2022-11-15 | 1.32 ppb | |
| 2022-11-15 | 0.520 ppb | |
| 2023-02-13 | 0.820 ppb | |
| 2023-02-14 | 1.000 ppb | |
| 2023-02-14 | 0.690 ppb | |
| 2023-02-14 | 0.990 ppb | |
| 2023-02-14 | 0.700 ppb | |
| 2023-02-14 | 0.640 ppb | |
| 2023-02-14 | 0.890 ppb | |
| 2023-02-14 | ND | |
| 2023-05-12 | 1.27 ppb | |
| 2023-05-12 | 1.19 ppb | |
| 2023-05-12 | 0.910 ppb | |
| 2023-05-12 | 1.33 ppb | |
| 2023-05-12 | 0.750 ppb | |
| 2023-05-12 | 0.800 ppb | |
| 2023-05-12 | 1.36 ppb | |
| 2023-05-12 | ND | |
| 2023-08-15 | 1.40 ppb | |
| 2023-08-15 | 1.50 ppb | |
| 2023-08-15 | 1.30 ppb | |
| 2023-08-15 | 1.50 ppb | |
| 2023-08-15 | 0.870 ppb | |
| 2023-08-15 | 0.850 ppb | |
| 2023-08-15 | 1.60 ppb | |
| 2023-08-15 | 0.810 ppb | |
| 2023-11-14 | 2.04 ppb | |
| 2023-11-14 | 1.77 ppb | |
| 2023-11-14 | 1.20 ppb | |
| 2023-11-14 | 2.32 ppb | |
| 2023-11-14 | 1.46 ppb | |
| 2023-11-14 | ND | |
| 2023-11-14 | 2.12 ppb | |
| 2023-11-14 | 1.21 ppb |