1,2,4-Trichlorobenzene
High-tor Properties
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 | 3 | 0 | ND |
| 2019 | ND | 3 | 0 | ND |
| 2020 | ND | 5 | 0 | ND |
| 2021 | ND | 3 | 0 | ND |
| 2022 | ND | 6 | 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 |
|---|---|---|
| 2018-06-26 | DW-91135 | ND |
| 2018-06-26 | DW-91131 | ND |
| 2018-06-26 | DW-91133 | ND |
| 2019-10-29 | 9101372-02 | ND |
| 2019-10-29 | 9101372-03 | ND |
| 2019-10-29 | 9101372 | ND |
| 2020-05-06 | 0050163-03 | ND |
| 2020-05-06 | 0050164-02V | ND |
| 2020-05-06 | 0050164-01V | ND |
| 2020-09-14 | 0090571-01VOC | ND |
| 2020-11-10 | 0110439-02V | ND |
| 2021-11-15 | 1110754-04 | ND |
| 2021-11-15 | 1110754-02 | ND |
| 2021-11-15 | 1110754-03 | ND |
| 2022-01-24 | EHS2200004719-01VOC | ND |
| 2022-01-24 | EHS2200004720-SR-2 | ND |
| 2022-01-24 | EHS2200004717-01VOC | ND |
| 2022-01-24 | EHS2200004720-01VOC | ND |
| 2022-01-24 | EHS2200009066-01 | ND |
| 2022-02-17 | EHS2200009066-SR-1 | ND |
| 2023-09-27 | 23I1769-01 | ND |
| 2023-10-27 | 23J1871-01 | ND |