Bromoform
Holum Water System
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 | ND | 16 | 0 | ND |
| 2019 | 0.0875 ppb | 16 | 2 | ND - 0.700 ppb |
| 2020 | 0.319 ppb | 8 | 4 | ND - 0.830 ppb |
| 2021 | 0.208 ppb | 8 | 3 | ND - 0.710 ppb |
| 2022 | 0.385 ppb | 8 | 4 | ND - 0.880 ppb |
| 2023 | 0.283 ppb | 8 | 3 | ND - 1.30 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 |
|---|---|---|
| 2018-02-21 | 35376144001 | ND |
| 2018-02-21 | 35376144002 | ND |
| 2018-02-21 | 35376144002 | ND |
| 2018-02-21 | 35376144001 | ND |
| 2018-05-11 | 35391971002 | ND |
| 2018-05-11 | 35391971001 | ND |
| 2018-05-11 | 35391971002 | ND |
| 2018-05-11 | 35391971001 | ND |
| 2018-08-06 | 35409889001 | ND |
| 2018-08-06 | 35409889002 | ND |
| 2018-08-06 | 35409889001 | ND |
| 2018-08-06 | 35409889002 | ND |
| 2018-11-14 | 35431647001 | ND |
| 2018-11-14 | 35431647001 | ND |
| 2018-11-14 | 35431647002 | ND |
| 2018-11-14 | 35431647002 | ND |
| 2019-02-13 | 35448472001 | ND |
| 2019-02-13 | 35448472002 | ND |
| 2019-02-13 | 35448472001 | ND |
| 2019-02-13 | 35448472002 | ND |
| 2019-05-06 | 35468216001 | ND |
| 2019-05-06 | 35468216002 | ND |
| 2019-05-06 | 35468216001 | ND |
| 2019-05-06 | 35468216002 | ND |
| 2019-08-05 | 35488688002 | ND |
| 2019-08-05 | 35488688001 | 0.700 ppb |
| 2019-08-05 | 35488688001 | 0.700 ppb |
| 2019-08-05 | 35488688002 | ND |
| 2019-11-04 | 35510921001 | ND |
| 2019-11-04 | 35510921002 | ND |
| 2019-11-04 | 35510921002 | ND |
| 2019-11-04 | 35510921001 | ND |
| 2020-02-03 | 35529025002 | ND |
| 2020-02-03 | 35529025001 | 0.480 ppb |
| 2020-05-19 | 35551976001 | 0.530 ppb |
| 2020-05-19 | 35551976002 | ND |
| 2020-08-03 | 35567980001 | 0.830 ppb |
| 2020-08-03 | 35567980002 | ND |
| 2020-11-15 | 35593725001 | 0.710 ppb |
| 2020-11-15 | 35593725002 | ND |
| 2021-02-01 | 35609397001 | 0.560 ppb |
| 2021-02-01 | 35609397002 | 0.390 ppb |
| 2021-05-03 | 35631378001 | ND |
| 2021-05-03 | 35631378002 | ND |
| 2021-08-02 | 35653683001 | ND |
| 2021-08-02 | 35653683002 | ND |
| 2021-11-16 | 35680134001 | 0.710 ppb |
| 2021-11-16 | 35680134002 | ND |
| 2022-02-14 | 35698449002 | 0.880 ppb |
| 2022-02-14 | 35698449001 | 0.790 ppb |
| 2022-05-17 | 35720010002 | ND |
| 2022-05-17 | 35720010001 | ND |
| 2022-08-15 | 35739942002 | 0.690 ppb |
| 2022-08-15 | 35739942001 | ND |
| 2022-11-16 | 35761576002 | ND |
| 2022-11-16 | 35761576001 | 0.720 ppb |
| 2023-02-07 | 35779275001 | 0.520 ppb |
| 2023-02-07 | 35779275002 | ND |
| 2023-05-16 | 35800907001 | 1.30 ppb |
| 2023-05-16 | 35800907002 | ND |
| 2023-08-07 | 35820961001 | 0.440 ppb |
| 2023-08-07 | 35820961002 | ND |
| 2023-11-27 | 35844562001 | ND |
| 2023-11-27 | 35844562002 | ND |