1,2,4-Trichlorobenzene
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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 | 4 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 4 | 0 | ND |
| 2023 | ND | 4 | 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 |
|---|---|---|
| 2018-02-27 | AE08317 | ND |
| 2018-06-14 | AE13736 | ND |
| 2018-07-25 | AE15755 | ND |
| 2018-10-10 | AE19481 | ND |
| 2019-03-07 | AE26872 | ND |
| 2019-06-13 | AE31970 | ND |
| 2019-09-04 | AE36637 | ND |
| 2019-11-13 | AE40146 | ND |
| 2020-03-12 | AE46093 | ND |
| 2020-05-27 | AE49083 | ND |
| 2020-07-22 | AE51793 | ND |
| 2020-10-21 | AE56198 | ND |
| 2021-03-11 | AE62654 | ND |
| 2021-05-26 | AE66572 | ND |
| 2021-09-21 | AE72335 | ND |
| 2021-10-20 | AE73728 | ND |
| 2022-02-23 | AE79541 | ND |
| 2022-04-20 | AE82474 | ND |
| 2022-09-14 | AE89723 | ND |
| 2022-10-18 | AE91740 | ND |
| 2023-01-24 | AE95947 | ND |
| 2023-04-18 | AF00389 | ND |
| 2023-07-18 | AF05697 | ND |
| 2023-10-17 | AF10284 | ND |