1,2,4-Trichlorobenzene
River Run 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 | ND | 2 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 1 | 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 |
|---|---|---|
| 2018-04-19 | CB02658-01 | ND |
| 2018-07-16 | CB09180-01 | ND |
| 2019-04-30 | CC03139-01 | ND |
| 2019-07-30 | CC09260-01 | ND |
| 2020-04-27 | CD02849-01 | ND |
| 2020-07-29 | CD08830-01 | ND |
| 2021-06-03 | CE02375-01 | ND |
| 2021-08-06 | CE07105-01 | ND |
| 2022-05-05 | CF03515-01 | ND |
| 2022-08-18 | CF09401-01 | ND |
| 2023-05-22 | 752-7477-1 | ND |