1,2,4-Trichlorobenzene
Swta - Main System
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 | 6 | 0 | ND |
| 2019 | ND | 5 | 0 | ND |
| 2020 | ND | 7 | 0 | ND |
| 2021 | ND | 5 | 0 | ND |
| 2022 | ND | 5 | 0 | ND |
| 2023 | ND | 7 | 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 |
|---|---|---|
| 2018-01-09 | 8012152-02 | ND |
| 2018-04-10 | 8042613-02 | ND |
| 2018-04-10 | 8042612-01 | ND |
| 2018-04-10 | 8042612-02 | ND |
| 2018-04-10 | 8042612-03 | ND |
| 2018-04-10 | 8042612-04 | ND |
| 2019-04-23 | 9044997-01 | ND |
| 2019-04-23 | 9044997-02 | ND |
| 2019-04-23 | 9044997-03 | ND |
| 2019-04-23 | 9044997-04 | ND |
| 2019-04-23 | 9044997-05 | ND |
| 2020-04-14 | 22080212.00 | ND |
| 2020-04-14 | 22080275.00 | ND |
| 2020-04-14 | 22080191.00 | ND |
| 2020-04-14 | 22080170.00 | ND |
| 2020-04-14 | 22080149.00 | ND |
| 2020-04-14 | 22080233.00 | ND |
| 2020-04-14 | 22080254.00 | ND |
| 2021-04-06 | 24301745.00 | ND |
| 2021-04-06 | 24301808.00 | ND |
| 2021-04-06 | 24301766.00 | ND |
| 2021-04-06 | 24301787.00 | ND |
| 2021-04-06 | 24301829.00 | ND |
| 2022-05-31 | 26899443.00 | ND |
| 2022-05-31 | 26899506.00 | ND |
| 2022-05-31 | 26899464.00 | ND |
| 2022-05-31 | 26899485.00 | ND |
| 2022-05-31 | 26899527.00 | ND |
| 2023-04-04 | 28761045.00 | ND |
| 2023-04-04 | 28761042.00 | ND |
| 2023-04-04 | 28761047.00 | ND |
| 2023-04-04 | 28761046.00 | ND |
| 2023-04-04 | 28761044.00 | ND |
| 2023-04-04 | 28761043.00 | ND |
| 2023-12-12 | 30296267.00 | ND |