Bromoform
Allendale Water Department
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 | 0.593 ppb | 11 | 8 | ND - 1.20 ppb |
| 2019 | 0.497 ppb | 10 | 9 | ND - 1.41 ppb |
| 2020 | 0.965 ppb | 10 | 10 | 0.333 ppb - 1.55 ppb |
| 2021 | 0.371 ppb | 13 | 10 | ND - 0.840 ppb |
| 2022 | 0.424 ppb | 11 | 8 | ND - 0.734 ppb |
| 2023 | 0.213 ppb | 9 | 2 | ND - 1.17 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 |
|---|---|---|
| 2018-01-22 | 8010676-01 | 1.01 ppb |
| 2018-03-06 | 8030250-01 | 0.839 ppb |
| 2018-03-06 | 8030250-02 | 0.739 ppb |
| 2018-06-05 | 8060257-01 | 0.764 ppb |
| 2018-06-05 | 8060257-02 | 0.816 ppb |
| 2018-07-16 | 8070628-01 | 0.861 ppb |
| 2018-09-04 | 8090144-01 | ND |
| 2018-09-04 | 8090144-02 | ND |
| 2018-10-15 | 8100803-02 | 1.20 ppb |
| 2018-12-03 | 8120185-01 | 0.290 ppb |
| 2018-12-03 | 8120185-02 | ND |
| 2019-01-22 | 9010845-01 | 0.449 ppb |
| 2019-03-05 | 9030253-01 | 0.591 ppb |
| 2019-03-05 | 9030253-02 | 0.682 ppb |
| 2019-04-04 | 9040340-01 | 1.41 ppb |
| 2019-06-05 | 9060294-01 | ND |
| 2019-06-05 | 9060294-02 | 0.347 ppb |
| 2019-09-05 | 9090285-01 | 0.325 ppb |
| 2019-09-05 | 9090285-02 | 0.259 ppb |
| 2019-12-03 | 9120168-01 | 0.451 ppb |
| 2019-12-03 | 9120168-02 | 0.453 ppb |
| 2020-03-05 | 0030344-01 | 1.01 ppb |
| 2020-03-05 | 0030344-02 | 0.904 ppb |
| 2020-04-02 | 0040177-03 | 0.361 ppb |
| 2020-06-04 | 0060295-01 | 0.811 ppb |
| 2020-06-04 | 0060295-02 | 0.723 ppb |
| 2020-09-03 | 0090268-01 | 1.44 ppb |
| 2020-09-03 | 0090268-02 | 1.32 ppb |
| 2020-10-08 | 0100518-03 | 1.55 ppb |
| 2020-12-03 | 0120279-01 | 1.20 ppb |
| 2020-12-03 | 0120279-02 | 0.333 ppb |
| 2021-01-07 | 1010338-04 | 0.496 ppb |
| 2021-03-04 | 1030315-01 | 0.840 ppb |
| 2021-03-04 | 1030315-02 | 0.781 ppb |
| 2021-04-08 | 1040421-01 | 0.348 ppb |
| 2021-06-03 | 1060283-01 | 0.683 ppb |
| 2021-06-03 | 1060283-02 | 0.584 ppb |
| 2021-07-01 | 1070121-04 | 0.346 ppb |
| 2021-09-02 | 1090141-01 | ND |
| 2021-09-02 | 1090141-02 | 0.188 ppb |
| 2021-10-20 | 1101041-01 | 0.201 ppb |
| 2021-11-23 | 1111333-01 | 0.360 ppb |
| 2021-12-02 | 1120297-01 | ND |
| 2021-12-02 | 1120297-02 | ND |
| 2022-01-06 | 2010302-01 | 0.226 ppb |
| 2022-03-03 | 2030313-01 | 0.734 ppb |
| 2022-03-03 | 2030313-02 | 0.690 ppb |
| 2022-04-07 | 2040467-01 | 0.438 ppb |
| 2022-06-02 | 2060199-01 | ND |
| 2022-06-02 | 2060199-02 | ND |
| 2022-07-14 | 2070774-02 | 0.634 ppb |
| 2022-09-08 | 2090372-01 | 0.625 ppb |
| 2022-09-08 | 2090372-02 | ND |
| 2022-12-08 | 2120415-01 | 0.638 ppb |
| 2022-12-08 | 2120415-02 | 0.679 ppb |
| 2023-01-12 | 23A0664-01 | 1.17 ppb |
| 2023-03-09 | 23C0515-01 | ND |
| 2023-03-09 | 23C0515-02 | ND |
| 2023-06-08 | 23F0471-01 | ND |
| 2023-06-08 | 23F0471-02 | ND |
| 2023-09-07 | 23I0443-01 | ND |
| 2023-09-07 | 23I0443-02 | 0.747 ppb |
| 2023-12-05 | 23L0310-01 | ND |
| 2023-12-05 | 23L0310-02 | ND |