1,2,4-Trichlorobenzene
Othello Water Department
1,2,4-Trichlorobenzene is an industrial solvent that can harm the adrenal glands and may increase the risk of cancer.
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 | 1 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 5 | 0 | ND |
| 2022 | ND | 8 | 0 | ND |
| 2023 | ND | 2 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 5 ppb
The EWG Health Guideline of 5 ppb for 1,2,4-trichlorobenzene was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against hormone disruption.
EPA Maximum Contaminant
Level (MCL): 70 ppb
The legal limit for 1,2,4-trichlorobenzene, established in 1992, was based on a toxicity study in laboratory animals conducted in 1981. This limit may not fully protect against hormone disruption.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-12-13 | ND | |
| 2019-06-18 | ND | |
| 2019-07-08 | ND | |
| 2021-03-31 | 4102279 | ND |
| 2021-08-11 | 4169108 | ND |
| 2021-08-11 | 4169236 | ND |
| 2021-10-13 | 4202782 | ND |
| 2021-10-13 | 4202781 | ND |
| 2022-03-15 | 4263100 | ND |
| 2022-06-02 | 4298828 | ND |
| 2022-06-08 | 4298813 | ND |
| 2022-06-08 | 4298812 | ND |
| 2022-08-08 | 4335854 | ND |
| 2022-09-06 | 4364651 | ND |
| 2022-09-06 | 4364663 | ND |
| 2022-10-06 | 4364641 | ND |
| 2023-04-17 | 4448578 | ND |
| 2023-06-12 | 4499780 | ND |