1,2,4-Trichlorobenzene
Grand Lakes Municipal Utility District 4
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 | 2 | 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 |
|---|---|---|
| 2018-07-17 | AE33595 | ND |
| 2018-07-17 | AE33601 | ND |
| 2019-04-12 | AE62293 | ND |
| 2019-04-12 | AE62303 | ND |
| 2020-06-24 | AF16785 | ND |
| 2020-06-24 | AF16791 | ND |
| 2021-06-21 | AF58887 | ND |
| 2021-06-21 | AF58889 | ND |
| 2022-01-21 | AF81329 | ND |
| 2022-01-21 | AF81331 | ND |
| 2023-07-20 | AG49589 | ND |
| 2023-07-20 | AG49591 | ND |