1,2,4-Trichlorobenzene
Spinsfield Commons
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 | 2 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 3 | 0 | ND |
| 2022 | ND | 4 | 0 | ND |
| 2023 | ND | 4 | 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 |
|---|---|---|
| 2018-11-29 | 1804742-01 | ND |
| 2018-11-29 | 1815101-01 | ND |
| 2019-09-17 | 1915631-01 | ND |
| 2020-06-22 | 2006-02977-001 | ND |
| 2021-03-22 | 2103-02814-001 | ND |
| 2021-07-15 | 2107-02568-001 | ND |
| 2021-10-28 | 2110-04882-001 | ND |
| 2022-01-27 | 2201-03503-001 | ND |
| 2022-04-22 | 2204-03689-001 | ND |
| 2022-07-22 | 2207-04385-001 | ND |
| 2022-10-24 | 2210-04713-001 | ND |
| 2023-01-26 | 2301-04315-001 | ND |
| 2023-04-19 | 2304-03951-001 | ND |
| 2023-08-23 | 2308-05509-001 | ND |
| 2023-10-16 | 2310-03511-001 | ND |