Bromoform
Pittsburgh Water & Sewer Authority
Bromoform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromoform 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 | 0.659 ppb | 48 | 17 | ND - 2.93 ppb |
| 2019 | 0.332 ppb | 48 | 17 | ND - 1.47 ppb |
| 2020 | 1.28 ppb | 48 | 24 | ND - 5.29 ppb |
| 2021 | ND | 51 | 0 | ND |
| 2022 | 0.491 ppb | 50 | 14 | ND - 2.20 ppb |
| 2023 | 0.504 ppb | 48 | 17 | ND - 1.89 ppb |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 0.5 ppb
The EWG Health Guideline of 0.5 ppb for bromoform is 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, harm to reproduction and child development, and change to fetal growth and development .
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-02-02 | 02180209 | ND |
| 2018-02-02 | 02180205 | ND |
| 2018-02-02 | 02180211 | ND |
| 2018-02-02 | 02180214 | ND |
| 2018-02-02 | 02180203 | ND |
| 2018-02-02 | 02180208 | ND |
| 2018-02-02 | 02180207 | ND |
| 2018-02-02 | 02180204 | ND |
| 2018-02-02 | 02180213 | ND |
| 2018-02-02 | 02180210 | ND |
| 2018-02-02 | 02180206 | ND |
| 2018-02-02 | 02180212 | ND |
| 2018-05-01 | 18E0088-04 | ND |
| 2018-05-01 | 18E0088-02 | ND |
| 2018-05-01 | 18E0088-07 | ND |
| 2018-05-01 | 18E0088-03 | ND |
| 2018-05-01 | 18E0088-01 | 0.620 ppb |
| 2018-05-01 | 18E0088-06 | ND |
| 2018-05-01 | 18E0088-05 | ND |
| 2018-05-02 | 18E0264-05 | ND |
| 2018-05-02 | 18E0264-01 | ND |
| 2018-05-02 | 18E0264-03 | ND |
| 2018-05-02 | 18E0264-04 | ND |
| 2018-05-02 | 18E0264-02 | ND |
| 2018-08-01 | 18H0210-04 | 1.24 ppb |
| 2018-08-01 | 18H0210-02 | 2.57 ppb |
| 2018-08-01 | 18H0210-03 | 2.03 ppb |
| 2018-08-01 | 18H0210-01 | 2.51 ppb |
| 2018-08-01 | 18H0210-05 | 2.62 ppb |
| 2018-08-01 | 18H0210-06 | 2.61 ppb |
| 2018-08-02 | 18H0572-04 | 2.34 ppb |
| 2018-08-02 | 18H0572-06 | 2.71 ppb |
| 2018-08-02 | 18H0572-01 | 2.40 ppb |
| 2018-08-02 | 18H0572-03 | 2.93 ppb |
| 2018-08-02 | 18H0572-05 | 2.57 ppb |
| 2018-08-02 | 18H0572-02 | 2.30 ppb |
| 2018-11-01 | 18K0426-04 | ND |
| 2018-11-01 | 18K0426-06 | 0.517 ppb |
| 2018-11-01 | 18K0426-03 | ND |
| 2018-11-01 | 18K0426-01 | ND |
| 2018-11-01 | 18K0426-02 | 0.560 ppb |
| 2018-11-01 | 18K0426-05 | ND |
| 2018-11-02 | 18K0627-02 | ND |
| 2018-11-02 | 18K0627-05 | ND |
| 2018-11-02 | 18K0627-01 | ND |
| 2018-11-02 | 18K0627-03 | 0.525 ppb |
| 2018-11-02 | 18K0627-06 | 0.586 ppb |
| 2018-11-02 | 18K0627-04 | ND |
| 2019-02-01 | 19B0579-01 | 0.502 ppb |
| 2019-02-01 | 19B0579-02 | ND |
| 2019-02-01 | 19B0579-03 | 0.512 ppb |
| 2019-02-01 | 19B0579-04 | 0.555 ppb |
| 2019-02-01 | 19B0579-05 | ND |
| 2019-02-01 | 19B0579-06 | ND |
| 2019-02-01 | 19B0579-07 | 0.512 ppb |
| 2019-02-01 | 19B0579-08 | ND |
| 2019-02-01 | 19B0579-09 | 0.584 ppb |
| 2019-02-01 | 19B0579-10 | ND |
| 2019-02-01 | 19B0579-11 | ND |
| 2019-02-01 | 19B0579-12 | 0.510 ppb |
| 2019-05-01 | 19E0821-02 | ND |
| 2019-05-01 | 19E0821-06 | ND |
| 2019-05-01 | 19E0821-03 | ND |
| 2019-05-01 | 19E0821-01 | ND |
| 2019-05-01 | 19E0821-05 | ND |
| 2019-05-01 | 19E0821-04 | ND |
| 2019-05-02 | 19E0870-03 | ND |
| 2019-05-02 | 19E0870-02 | ND |
| 2019-05-02 | 19E0870-01 | ND |
| 2019-05-03 | 19E1121-02 | ND |
| 2019-05-03 | 19E1121-01 | ND |
| 2019-05-03 | 19E1121-03 | ND |
| 2019-08-01 | 19H1062-03 | ND |
| 2019-08-01 | 19H1062-06 | ND |
| 2019-08-01 | 19H1062-02 | ND |
| 2019-08-01 | 19H1062-01 | ND |
| 2019-08-01 | 19H1062-04 | ND |
| 2019-08-01 | 19H1062-05 | ND |
| 2019-08-02 | 19H1096-02 | ND |
| 2019-08-02 | 19H1096-05 | ND |
| 2019-08-02 | 19H1096-01 | ND |
| 2019-08-02 | 19H1096-04 | ND |
| 2019-08-02 | 19H1096-06 | ND |
| 2019-08-02 | 19H1096-03 | ND |
| 2019-11-01 | 19K0944-03 | 0.856 ppb |
| 2019-11-01 | 19K0946-02 | 1.26 ppb |
| 2019-11-01 | 19K0944-04 | 1.09 ppb |
| 2019-11-01 | 19K0944-06 | 1.44 ppb |
| 2019-11-01 | 19K0944-01 | 1.10 ppb |
| 2019-11-01 | 19K0946-04 | ND |
| 2019-11-01 | 19K0944-02 | 1.33 ppb |
| 2019-11-01 | 19K0946-01 | 0.563 ppb |
| 2019-11-01 | 19K0946-06 | 1.47 ppb |
| 2019-11-01 | 19K0946-05 | 1.11 ppb |
| 2019-11-01 | 19K0946-03 | 1.23 ppb |
| 2019-11-01 | 19K0944-05 | 1.31 ppb |
| 2020-02-03 | ND | |
| 2020-02-03 | ND | |
| 2020-02-03 | ND | |
| 2020-02-03 | ND | |
| 2020-02-03 | ND | |
| 2020-02-03 | ND | |
| 2020-02-03 | ND | |
| 2020-02-03 | ND | |
| 2020-02-03 | ND | |
| 2020-02-03 | ND | |
| 2020-02-03 | ND | |
| 2020-02-03 | ND | |
| 2020-05-01 | ND | |
| 2020-05-01 | ND | |
| 2020-05-01 | ND | |
| 2020-05-01 | ND | |
| 2020-05-01 | ND | |
| 2020-05-01 | ND | |
| 2020-05-01 | ND | |
| 2020-05-01 | ND | |
| 2020-05-01 | ND | |
| 2020-05-01 | ND | |
| 2020-05-01 | ND | |
| 2020-05-01 | ND | |
| 2020-07-30 | 3.34 ppb | |
| 2020-07-30 | 2.77 ppb | |
| 2020-07-31 | 2.26 ppb | |
| 2020-07-31 | 2.84 ppb | |
| 2020-07-31 | 1.78 ppb | |
| 2020-07-31 | 2.62 ppb | |
| 2020-07-31 | 3.15 ppb | |
| 2020-07-31 | 2.74 ppb | |
| 2020-08-03 | 3.19 ppb | |
| 2020-08-03 | 3.32 ppb | |
| 2020-08-03 | 2.95 ppb | |
| 2020-08-03 | 2.52 ppb | |
| 2020-11-02 | 2.48 ppb | |
| 2020-11-02 | 1.81 ppb | |
| 2020-11-02 | 1.80 ppb | |
| 2020-11-02 | 2.26 ppb | |
| 2020-11-02 | 2.39 ppb | |
| 2020-11-02 | 1.05 ppb | |
| 2020-11-02 | 2.28 ppb | |
| 2020-11-02 | 1.82 ppb | |
| 2020-11-02 | 2.71 ppb | |
| 2020-11-02 | 2.01 ppb | |
| 2020-11-02 | 2.07 ppb | |
| 2020-11-02 | 5.29 ppb | |
| 2021-02-01 | ND | |
| 2021-02-01 | ND | |
| 2021-02-01 | ND | |
| 2021-02-01 | ND | |
| 2021-02-01 | ND | |
| 2021-02-02 | ND | |
| 2021-02-02 | ND | |
| 2021-02-02 | ND | |
| 2021-02-02 | ND | |
| 2021-02-02 | ND | |
| 2021-02-02 | ND | |
| 2021-02-02 | ND | |
| 2021-04-29 | ND | |
| 2021-04-29 | ND | |
| 2021-04-29 | ND | |
| 2021-04-29 | ND | |
| 2021-04-29 | ND | |
| 2021-04-29 | ND | |
| 2021-04-29 | ND | |
| 2021-04-30 | ND | |
| 2021-04-30 | ND | |
| 2021-04-30 | ND | |
| 2021-04-30 | ND | |
| 2021-04-30 | ND | |
| 2021-07-30 | ND | |
| 2021-07-30 | ND | |
| 2021-07-30 | ND | |
| 2021-07-30 | ND | |
| 2021-08-02 | ND | |
| 2021-08-02 | ND | |
| 2021-08-02 | ND | |
| 2021-08-02 | ND | |
| 2021-08-02 | ND | |
| 2021-08-02 | ND | |
| 2021-08-02 | ND | |
| 2021-08-03 | ND | |
| 2021-08-13 | ND | |
| 2021-11-01 | ND | |
| 2021-11-01 | ND | |
| 2021-11-01 | ND | |
| 2021-11-01 | ND | |
| 2021-11-01 | ND | |
| 2021-11-02 | ND | |
| 2021-11-02 | ND | |
| 2021-11-02 | ND | |
| 2021-11-02 | ND | |
| 2021-11-02 | ND | |
| 2021-11-02 | ND | |
| 2021-11-02 | ND | |
| 2021-11-05 | ND | |
| 2021-11-05 | ND | |
| 2022-02-01 | ND | |
| 2022-02-01 | ND | |
| 2022-02-01 | ND | |
| 2022-02-01 | ND | |
| 2022-02-01 | ND | |
| 2022-02-01 | ND | |
| 2022-02-01 | ND | |
| 2022-02-01 | ND | |
| 2022-02-01 | ND | |
| 2022-02-01 | ND | |
| 2022-02-01 | ND | |
| 2022-02-01 | ND | |
| 2022-05-02 | ND | |
| 2022-05-02 | ND | |
| 2022-05-02 | ND | |
| 2022-05-02 | ND | |
| 2022-05-02 | ND | |
| 2022-05-02 | ND | |
| 2022-05-02 | ND | |
| 2022-05-02 | ND | |
| 2022-05-02 | ND | |
| 2022-05-02 | ND | |
| 2022-05-02 | ND | |
| 2022-05-03 | ND | |
| 2022-08-01 | 1.80 ppb | |
| 2022-08-01 | 2.00 ppb | |
| 2022-08-01 | 2.12 ppb | |
| 2022-08-01 | 1.40 ppb | |
| 2022-08-01 | 1.46 ppb | |
| 2022-08-01 | 2.05 ppb | |
| 2022-08-01 | 1.85 ppb | |
| 2022-08-01 | 1.85 ppb | |
| 2022-08-01 | 1.79 ppb | |
| 2022-08-01 | 1.81 ppb | |
| 2022-08-02 | 1.27 ppb | |
| 2022-08-02 | 1.83 ppb | |
| 2022-08-22 | 1.14 ppb | |
| 2022-08-23 | 2.20 ppb | |
| 2022-11-01 | ND | |
| 2022-11-01 | ND | |
| 2022-11-01 | ND | |
| 2022-11-01 | ND | |
| 2022-11-01 | ND | |
| 2022-11-01 | ND | |
| 2022-11-01 | ND | |
| 2022-11-01 | ND | |
| 2022-11-01 | ND | |
| 2022-11-01 | ND | |
| 2022-11-01 | ND | |
| 2022-11-01 | ND | |
| 2023-02-02 | ND | |
| 2023-02-02 | ND | |
| 2023-02-02 | ND | |
| 2023-02-02 | ND | |
| 2023-02-02 | ND | |
| 2023-02-02 | ND | |
| 2023-02-02 | ND | |
| 2023-02-02 | ND | |
| 2023-02-02 | ND | |
| 2023-02-02 | ND | |
| 2023-02-02 | ND | |
| 2023-02-02 | ND | |
| 2023-05-01 | ND | |
| 2023-05-01 | ND | |
| 2023-05-01 | ND | |
| 2023-05-01 | ND | |
| 2023-05-01 | ND | |
| 2023-05-01 | ND | |
| 2023-05-01 | ND | |
| 2023-05-01 | ND | |
| 2023-05-01 | ND | |
| 2023-05-01 | ND | |
| 2023-05-01 | ND | |
| 2023-05-01 | ND | |
| 2023-08-01 | ND | |
| 2023-08-01 | 1.62 ppb | |
| 2023-08-01 | 1.43 ppb | |
| 2023-08-01 | 1.85 ppb | |
| 2023-08-01 | 1.62 ppb | |
| 2023-08-01 | 1.03 ppb | |
| 2023-08-01 | 1.54 ppb | |
| 2023-08-01 | 1.41 ppb | |
| 2023-08-01 | 1.87 ppb | |
| 2023-08-01 | 1.69 ppb | |
| 2023-08-01 | 1.89 ppb | |
| 2023-08-01 | 1.69 ppb | |
| 2023-10-30 | ND | |
| 2023-10-30 | 1.06 ppb | |
| 2023-10-30 | 1.10 ppb | |
| 2023-10-30 | 1.12 ppb | |
| 2023-10-30 | ND | |
| 2023-10-30 | ND | |
| 2023-10-31 | ND | |
| 2023-10-31 | 1.10 ppb | |
| 2023-10-31 | 1.15 ppb | |
| 2023-10-31 | ND | |
| 2023-10-31 | ND | |
| 2023-10-31 | 1.000 ppb |