1,2,4-Trichlorobenzene
Dorchester, Village of
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 | 1 | 0 | ND |
| 2020 | ND | 3 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 5 | 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 |
|---|---|---|
| 2018-07-16 | 560158 | ND |
| 2019-07-15 | 621241 | ND |
| 2020-05-26 | 667014 | ND |
| 2020-09-14 | 684285 | ND |
| 2020-09-28 | 701100 | ND |
| 2021-07-19 | 745978 | ND |
| 2022-07-05 | 809302 | ND |
| 2022-07-27 | 818275 | ND |
| 2023-01-17 | 842469 | ND |
| 2023-04-24 | 855387 | ND |
| 2023-05-15 | 855924 | ND |
| 2023-07-17 | 873260 | ND |
| 2023-10-16 | 891653 | ND |