Dibromochloromethane
Pittsburgh Water & Sewer 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 | 7.23 ppb | 48 | 48 | 2.00 ppb - 19.6 ppb |
| 2019 | 5.85 ppb | 48 | 48 | 2.66 ppb - 12.2 ppb |
| 2020 | 9.53 ppb | 48 | 48 | 1.60 ppb - 24.3 ppb |
| 2021 | 4.94 ppb | 51 | 51 | 2.58 ppb - 8.47 ppb |
| 2022 | 6.41 ppb | 50 | 50 | 2.07 ppb - 18.0 ppb |
| 2023 | 7.21 ppb | 48 | 48 | 1.63 ppb - 16.1 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 |
|---|---|---|
| 2018-02-02 | 02180209 | 3.00 ppb |
| 2018-02-02 | 02180205 | 3.00 ppb |
| 2018-02-02 | 02180211 | 2.00 ppb |
| 2018-02-02 | 02180214 | 2.00 ppb |
| 2018-02-02 | 02180203 | 2.00 ppb |
| 2018-02-02 | 02180208 | 2.00 ppb |
| 2018-02-02 | 02180207 | 2.00 ppb |
| 2018-02-02 | 02180204 | 3.00 ppb |
| 2018-02-02 | 02180213 | 3.00 ppb |
| 2018-02-02 | 02180210 | 2.00 ppb |
| 2018-02-02 | 02180206 | 2.00 ppb |
| 2018-02-02 | 02180212 | 3.00 ppb |
| 2018-05-01 | 18E0088-04 | 3.86 ppb |
| 2018-05-01 | 18E0088-02 | 4.20 ppb |
| 2018-05-01 | 18E0088-07 | 3.34 ppb |
| 2018-05-01 | 18E0088-03 | 4.02 ppb |
| 2018-05-01 | 18E0088-01 | 5.43 ppb |
| 2018-05-01 | 18E0088-06 | 3.90 ppb |
| 2018-05-01 | 18E0088-05 | 4.02 ppb |
| 2018-05-02 | 18E0264-05 | 3.82 ppb |
| 2018-05-02 | 18E0264-01 | 3.84 ppb |
| 2018-05-02 | 18E0264-03 | 4.18 ppb |
| 2018-05-02 | 18E0264-04 | 4.26 ppb |
| 2018-05-02 | 18E0264-02 | 4.10 ppb |
| 2018-08-01 | 18H0210-04 | 8.74 ppb |
| 2018-08-01 | 18H0210-02 | 19.0 ppb |
| 2018-08-01 | 18H0210-03 | 13.4 ppb |
| 2018-08-01 | 18H0210-01 | 16.2 ppb |
| 2018-08-01 | 18H0210-05 | 19.4 ppb |
| 2018-08-01 | 18H0210-06 | 18.0 ppb |
| 2018-08-02 | 18H0572-04 | 15.4 ppb |
| 2018-08-02 | 18H0572-06 | 18.1 ppb |
| 2018-08-02 | 18H0572-01 | 17.3 ppb |
| 2018-08-02 | 18H0572-03 | 19.6 ppb |
| 2018-08-02 | 18H0572-05 | 18.6 ppb |
| 2018-08-02 | 18H0572-02 | 16.7 ppb |
| 2018-11-01 | 18K0426-04 | 3.60 ppb |
| 2018-11-01 | 18K0426-06 | 6.34 ppb |
| 2018-11-01 | 18K0426-03 | 3.27 ppb |
| 2018-11-01 | 18K0426-01 | 3.37 ppb |
| 2018-11-01 | 18K0426-02 | 6.90 ppb |
| 2018-11-01 | 18K0426-05 | 6.33 ppb |
| 2018-11-02 | 18K0627-02 | 6.38 ppb |
| 2018-11-02 | 18K0627-05 | 5.46 ppb |
| 2018-11-02 | 18K0627-01 | 6.37 ppb |
| 2018-11-02 | 18K0627-03 | 6.78 ppb |
| 2018-11-02 | 18K0627-06 | 7.64 ppb |
| 2018-11-02 | 18K0627-04 | 6.36 ppb |
| 2019-02-01 | 19B0579-01 | 4.66 ppb |
| 2019-02-01 | 19B0579-02 | 4.30 ppb |
| 2019-02-01 | 19B0579-03 | 4.51 ppb |
| 2019-02-01 | 19B0579-04 | 4.92 ppb |
| 2019-02-01 | 19B0579-05 | 4.15 ppb |
| 2019-02-01 | 19B0579-06 | 2.69 ppb |
| 2019-02-01 | 19B0579-07 | 4.60 ppb |
| 2019-02-01 | 19B0579-08 | 2.84 ppb |
| 2019-02-01 | 19B0579-09 | 5.02 ppb |
| 2019-02-01 | 19B0579-10 | 3.84 ppb |
| 2019-02-01 | 19B0579-11 | 4.40 ppb |
| 2019-02-01 | 19B0579-12 | 4.50 ppb |
| 2019-05-01 | 19E0821-02 | 3.65 ppb |
| 2019-05-01 | 19E0821-06 | 3.72 ppb |
| 2019-05-01 | 19E0821-03 | 2.66 ppb |
| 2019-05-01 | 19E0821-01 | 3.33 ppb |
| 2019-05-01 | 19E0821-05 | 3.89 ppb |
| 2019-05-01 | 19E0821-04 | 3.46 ppb |
| 2019-05-02 | 19E0870-03 | 3.45 ppb |
| 2019-05-02 | 19E0870-02 | 3.46 ppb |
| 2019-05-02 | 19E0870-01 | 3.37 ppb |
| 2019-05-03 | 19E1121-02 | 3.58 ppb |
| 2019-05-03 | 19E1121-01 | 3.39 ppb |
| 2019-05-03 | 19E1121-03 | 3.35 ppb |
| 2019-08-01 | 19H1062-03 | 5.58 ppb |
| 2019-08-01 | 19H1062-06 | 6.59 ppb |
| 2019-08-01 | 19H1062-02 | 6.23 ppb |
| 2019-08-01 | 19H1062-01 | 6.71 ppb |
| 2019-08-01 | 19H1062-04 | 6.31 ppb |
| 2019-08-01 | 19H1062-05 | 6.70 ppb |
| 2019-08-02 | 19H1096-02 | 6.65 ppb |
| 2019-08-02 | 19H1096-05 | 5.42 ppb |
| 2019-08-02 | 19H1096-01 | 6.67 ppb |
| 2019-08-02 | 19H1096-04 | 6.78 ppb |
| 2019-08-02 | 19H1096-06 | 6.65 ppb |
| 2019-08-02 | 19H1096-03 | 6.69 ppb |
| 2019-11-01 | 19K0944-03 | 6.42 ppb |
| 2019-11-01 | 19K0946-02 | 10.6 ppb |
| 2019-11-01 | 19K0944-04 | 8.67 ppb |
| 2019-11-01 | 19K0944-06 | 11.2 ppb |
| 2019-11-01 | 19K0944-01 | 9.68 ppb |
| 2019-11-01 | 19K0946-04 | 4.86 ppb |
| 2019-11-01 | 19K0944-02 | 10.9 ppb |
| 2019-11-01 | 19K0946-01 | 6.80 ppb |
| 2019-11-01 | 19K0946-06 | 12.2 ppb |
| 2019-11-01 | 19K0946-05 | 9.36 ppb |
| 2019-11-01 | 19K0946-03 | 10.7 ppb |
| 2019-11-01 | 19K0944-05 | 10.7 ppb |
| 2020-02-03 | 2.56 ppb | |
| 2020-02-03 | 2.20 ppb | |
| 2020-02-03 | 2.42 ppb | |
| 2020-02-03 | 2.47 ppb | |
| 2020-02-03 | 2.29 ppb | |
| 2020-02-03 | 1.96 ppb | |
| 2020-02-03 | 2.50 ppb | |
| 2020-02-03 | 2.08 ppb | |
| 2020-02-03 | 2.81 ppb | |
| 2020-02-03 | 2.37 ppb | |
| 2020-02-03 | 2.43 ppb | |
| 2020-02-03 | 2.41 ppb | |
| 2020-05-01 | 1.60 ppb | |
| 2020-05-01 | 2.98 ppb | |
| 2020-05-01 | 2.64 ppb | |
| 2020-05-01 | 2.97 ppb | |
| 2020-05-01 | 3.03 ppb | |
| 2020-05-01 | 2.97 ppb | |
| 2020-05-01 | 3.06 ppb | |
| 2020-05-01 | 3.52 ppb | |
| 2020-05-01 | 2.91 ppb | |
| 2020-05-01 | 3.15 ppb | |
| 2020-05-01 | 3.01 ppb | |
| 2020-05-01 | 2.73 ppb | |
| 2020-07-30 | 22.6 ppb | |
| 2020-07-30 | 18.8 ppb | |
| 2020-07-31 | 15.6 ppb | |
| 2020-07-31 | 19.1 ppb | |
| 2020-07-31 | 14.1 ppb | |
| 2020-07-31 | 18.9 ppb | |
| 2020-07-31 | 21.2 ppb | |
| 2020-07-31 | 19.1 ppb | |
| 2020-08-03 | 21.7 ppb | |
| 2020-08-03 | 21.9 ppb | |
| 2020-08-03 | 20.9 ppb | |
| 2020-08-03 | 18.5 ppb | |
| 2020-11-02 | 14.9 ppb | |
| 2020-11-02 | 11.4 ppb | |
| 2020-11-02 | 11.0 ppb | |
| 2020-11-02 | 12.4 ppb | |
| 2020-11-02 | 12.8 ppb | |
| 2020-11-02 | 8.35 ppb | |
| 2020-11-02 | 14.3 ppb | |
| 2020-11-02 | 10.6 ppb | |
| 2020-11-02 | 16.7 ppb | |
| 2020-11-02 | 12.8 ppb | |
| 2020-11-02 | 12.2 ppb | |
| 2020-11-02 | 24.3 ppb | |
| 2021-02-01 | 4.40 ppb | |
| 2021-02-01 | 4.76 ppb | |
| 2021-02-01 | 3.37 ppb | |
| 2021-02-01 | 4.45 ppb | |
| 2021-02-01 | 4.39 ppb | |
| 2021-02-02 | 4.21 ppb | |
| 2021-02-02 | 4.52 ppb | |
| 2021-02-02 | 4.46 ppb | |
| 2021-02-02 | 4.56 ppb | |
| 2021-02-02 | 4.40 ppb | |
| 2021-02-02 | 4.88 ppb | |
| 2021-02-02 | 4.23 ppb | |
| 2021-04-29 | 6.76 ppb | |
| 2021-04-29 | 7.68 ppb | |
| 2021-04-29 | 7.75 ppb | |
| 2021-04-29 | 7.94 ppb | |
| 2021-04-29 | 8.47 ppb | |
| 2021-04-29 | 7.83 ppb | |
| 2021-04-29 | 7.69 ppb | |
| 2021-04-30 | 7.37 ppb | |
| 2021-04-30 | 8.17 ppb | |
| 2021-04-30 | 8.31 ppb | |
| 2021-04-30 | 8.16 ppb | |
| 2021-04-30 | 7.86 ppb | |
| 2021-07-30 | 3.98 ppb | |
| 2021-07-30 | 3.69 ppb | |
| 2021-07-30 | 3.59 ppb | |
| 2021-07-30 | 3.57 ppb | |
| 2021-08-02 | 4.75 ppb | |
| 2021-08-02 | 3.57 ppb | |
| 2021-08-02 | 4.34 ppb | |
| 2021-08-02 | 4.25 ppb | |
| 2021-08-02 | 3.66 ppb | |
| 2021-08-02 | 3.90 ppb | |
| 2021-08-02 | 4.33 ppb | |
| 2021-08-03 | 3.40 ppb | |
| 2021-08-13 | 7.25 ppb | |
| 2021-11-01 | 2.79 ppb | |
| 2021-11-01 | 3.69 ppb | |
| 2021-11-01 | 3.05 ppb | |
| 2021-11-01 | 4.79 ppb | |
| 2021-11-01 | 4.76 ppb | |
| 2021-11-02 | 3.24 ppb | |
| 2021-11-02 | 3.52 ppb | |
| 2021-11-02 | 3.81 ppb | |
| 2021-11-02 | 2.58 ppb | |
| 2021-11-02 | 4.08 ppb | |
| 2021-11-02 | 3.50 ppb | |
| 2021-11-02 | 3.55 ppb | |
| 2021-11-05 | 4.37 ppb | |
| 2021-11-05 | 3.52 ppb | |
| 2022-02-01 | 3.61 ppb | |
| 2022-02-01 | 3.50 ppb | |
| 2022-02-01 | 3.40 ppb | |
| 2022-02-01 | 3.52 ppb | |
| 2022-02-01 | 3.70 ppb | |
| 2022-02-01 | 3.58 ppb | |
| 2022-02-01 | 3.67 ppb | |
| 2022-02-01 | 3.59 ppb | |
| 2022-02-01 | 3.60 ppb | |
| 2022-02-01 | 3.61 ppb | |
| 2022-02-01 | 3.49 ppb | |
| 2022-02-01 | 3.31 ppb | |
| 2022-05-02 | 2.07 ppb | |
| 2022-05-02 | 3.16 ppb | |
| 2022-05-02 | 2.45 ppb | |
| 2022-05-02 | 2.72 ppb | |
| 2022-05-02 | 2.96 ppb | |
| 2022-05-02 | 3.16 ppb | |
| 2022-05-02 | 3.28 ppb | |
| 2022-05-02 | 2.86 ppb | |
| 2022-05-02 | 3.07 ppb | |
| 2022-05-02 | 3.02 ppb | |
| 2022-05-02 | 3.16 ppb | |
| 2022-05-03 | 3.06 ppb | |
| 2022-08-01 | 13.8 ppb | |
| 2022-08-01 | 15.1 ppb | |
| 2022-08-01 | 16.5 ppb | |
| 2022-08-01 | 11.9 ppb | |
| 2022-08-01 | 13.1 ppb | |
| 2022-08-01 | 15.8 ppb | |
| 2022-08-01 | 14.6 ppb | |
| 2022-08-01 | 14.8 ppb | |
| 2022-08-01 | 14.6 ppb | |
| 2022-08-01 | 14.6 ppb | |
| 2022-08-02 | 7.39 ppb | |
| 2022-08-02 | 14.5 ppb | |
| 2022-08-22 | 7.28 ppb | |
| 2022-08-23 | 18.0 ppb | |
| 2022-11-01 | 2.73 ppb | |
| 2022-11-01 | 4.66 ppb | |
| 2022-11-01 | 4.23 ppb | |
| 2022-11-01 | 4.57 ppb | |
| 2022-11-01 | 4.65 ppb | |
| 2022-11-01 | 3.70 ppb | |
| 2022-11-01 | 4.87 ppb | |
| 2022-11-01 | 3.85 ppb | |
| 2022-11-01 | 4.99 ppb | |
| 2022-11-01 | 4.76 ppb | |
| 2022-11-01 | 3.64 ppb | |
| 2022-11-01 | 4.22 ppb | |
| 2023-02-02 | 1.76 ppb | |
| 2023-02-02 | 1.79 ppb | |
| 2023-02-02 | 1.63 ppb | |
| 2023-02-02 | 1.67 ppb | |
| 2023-02-02 | 1.94 ppb | |
| 2023-02-02 | 1.83 ppb | |
| 2023-02-02 | 1.79 ppb | |
| 2023-02-02 | 1.97 ppb | |
| 2023-02-02 | 1.63 ppb | |
| 2023-02-02 | 1.80 ppb | |
| 2023-02-02 | 1.69 ppb | |
| 2023-02-02 | 1.76 ppb | |
| 2023-05-01 | 2.88 ppb | |
| 2023-05-01 | 5.12 ppb | |
| 2023-05-01 | 4.84 ppb | |
| 2023-05-01 | 4.55 ppb | |
| 2023-05-01 | 5.08 ppb | |
| 2023-05-01 | 4.71 ppb | |
| 2023-05-01 | 4.98 ppb | |
| 2023-05-01 | 4.80 ppb | |
| 2023-05-01 | 5.12 ppb | |
| 2023-05-01 | 5.25 ppb | |
| 2023-05-01 | 5.03 ppb | |
| 2023-05-01 | 3.56 ppb | |
| 2023-08-01 | 5.04 ppb | |
| 2023-08-01 | 15.7 ppb | |
| 2023-08-01 | 13.0 ppb | |
| 2023-08-01 | 14.9 ppb | |
| 2023-08-01 | 14.8 ppb | |
| 2023-08-01 | 9.90 ppb | |
| 2023-08-01 | 14.5 ppb | |
| 2023-08-01 | 13.0 ppb | |
| 2023-08-01 | 15.3 ppb | |
| 2023-08-01 | 16.1 ppb | |
| 2023-08-01 | 15.3 ppb | |
| 2023-08-01 | 14.8 ppb | |
| 2023-10-30 | 5.51 ppb | |
| 2023-10-30 | 10.2 ppb | |
| 2023-10-30 | 9.95 ppb | |
| 2023-10-30 | 10.1 ppb | |
| 2023-10-30 | 8.12 ppb | |
| 2023-10-30 | 8.78 ppb | |
| 2023-10-31 | 9.47 ppb | |
| 2023-10-31 | 8.74 ppb | |
| 2023-10-31 | 9.77 ppb | |
| 2023-10-31 | 6.88 ppb | |
| 2023-10-31 | 9.66 ppb | |
| 2023-10-31 | 9.43 ppb |