1,2,4-Trichlorobenzene
Aqua Pa Bristol
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 | 3 | 0 | ND |
| 2020 | ND | 5 | 0 | ND |
| 2021 | ND | 5 | 0 | ND |
| 2022 | ND | 6 | 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 |
|---|---|---|
| 2018-02-02 | AF75113 | ND |
| 2018-02-22 | AF76987 | ND |
| 2019-02-01 | AG07157 | ND |
| 2019-03-07 | AG10696 | ND |
| 2019-04-12 | AG14108 | ND |
| 2020-01-10 | 21483475.00 | ND |
| 2020-04-03 | 22002012.00 | ND |
| 2020-04-09 | 22002033.00 | ND |
| 2020-07-10 | 22586032.00 | ND |
| 2020-10-23 | 23162717.00 | ND |
| 2021-01-15 | 23692346.00 | ND |
| 2021-02-05 | 23869120.00 | ND |
| 2021-05-14 | 24417525.00 | ND |
| 2021-07-09 | 24807868.00 | ND |
| 2021-10-08 | 25383920.00 | ND |
| 2022-01-14 | 25922404.00 | ND |
| 2022-02-03 | 26099332.00 | ND |
| 2022-04-01 | 26443303.00 | ND |
| 2022-04-08 | 26443324.00 | ND |
| 2022-07-08 | 27016769.00 | ND |
| 2022-11-08 | 27804048.00 | ND |
| 2023-01-27 | 28152908.00 | ND |
| 2023-02-16 | 28330619.00 | ND |