1,2,4-Trichlorobenzene
Clark Public Utilities
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 | 11 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 3 | 0 | ND |
| 2022 | ND | 7 | 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 |
|---|---|---|
| 2018-08-01 | ND | |
| 2018-08-01 | ND | |
| 2018-08-01 | ND | |
| 2018-08-01 | ND | |
| 2018-08-01 | ND | |
| 2018-08-28 | ND | |
| 2018-08-28 | ND | |
| 2018-09-18 | ND | |
| 2018-09-18 | ND | |
| 2018-09-18 | ND | |
| 2018-11-18 | ND | |
| 2019-02-24 | ND | |
| 2019-02-24 | ND | |
| 2019-07-22 | ND | |
| 2019-09-05 | ND | |
| 2021-06-30 | 4143007 | ND |
| 2021-08-02 | 4169136 | ND |
| 2021-08-02 | 4169145 | ND |
| 2022-07-27 | 4328694 | ND |
| 2022-07-28 | 4328695 | ND |
| 2022-07-28 | 4328685 | ND |
| 2022-07-28 | 4328702 | ND |
| 2022-08-03 | 4328676 | ND |
| 2022-08-03 | 4328680 | ND |
| 2022-08-03 | 4328682 | ND |
| 2023-05-23 | 4545879 | ND |
| 2023-06-12 | 4473923 | ND |
| 2023-06-12 | 4473920 | ND |
| 2023-06-12 | 4473922 | ND |
| 2023-06-12 | 4473924 | ND |