1,2,4-Trichlorobenzene
City of Gonzales
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 | 5 | 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 |
|---|---|---|
| 2018-05-03 | AE25102 | ND |
| 2018-08-16 | AE37381 | ND |
| 2019-03-05 | AE57172 | ND |
| 2019-07-12 | AE74427 | ND |
| 2020-01-21 | AE94327 | ND |
| 2020-01-21 | AE94345 | ND |
| 2020-04-13 | AF06481 | ND |
| 2020-07-07 | AF18363 | ND |
| 2020-11-13 | AF34895 | ND |
| 2021-01-13 | AF39138 | ND |
| 2021-01-13 | AF39140 | ND |
| 2022-03-11 | AF88903 | ND |
| 2022-09-30 | AG15716 | ND |
| 2023-02-27 | AG30619 | ND |
| 2023-02-27 | AG30625 | ND |