1,2,4-Trichlorobenzene
Stagecoach 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 | 4 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 3 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 3 | 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 |
|---|---|---|
| 2018-02-21 | CA18460-01 | ND |
| 2018-05-16 | CB03528-01 | ND |
| 2018-07-19 | CB08253-01 | ND |
| 2018-10-16 | CB14421-01 | ND |
| 2019-10-30 | CC15944-01 | ND |
| 2020-02-18 | CC20130-01 | ND |
| 2020-02-18 | CD02777-01 | ND |
| 2020-12-03 | CD13768-01 | ND |
| 2021-10-13 | CE12487-01 | ND |
| 2022-11-29 | CF12790-01 | ND |
| 2023-02-03 | 752-2301-1 | ND |
| 2023-02-08 | 752-2734-1 | ND |
| 2023-10-31 | 37729_23-61683 | ND |