1,2,4-Trichlorobenzene
Medfield Estates S/d
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 | N/A | 0 | 0 | N/A |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 3 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | ND | 5 | 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 |
|---|---|---|
| 2019-04-16 | CC04242-01 | ND |
| 2020-01-08 | CC20033-01 | ND |
| 2020-01-08 | CC20033-03 | ND |
| 2020-01-08 | CC20033-05 | ND |
| 2022-01-25 | CE17865-01 | ND |
| 2022-04-14 | CF02388-01 | ND |
| 2022-06-15 | CF04821-03 | ND |
| 2022-08-29 | CF07095-01 | ND |
| 2022-11-29 | CF12715-01 | ND |
| 2023-01-25 | 752-1952-1 | ND |
| 2023-01-25 | 752-1952-2 | ND |
| 2023-01-25 | 752-1952-3 | ND |
| 2023-01-25 | 752-1952-4 | ND |