1,2,4-Trichlorobenzene
Tempe Water Supply Corporation 1
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 |
|---|---|---|
| 2018-02-13 | AE13556 | ND |
| 2018-02-13 | AE13592 | ND |
| 2018-02-13 | AE13596 | ND |
| 2018-02-13 | AE13554 | ND |
| 2019-02-26 | AE55992 | ND |
| 2019-02-26 | AE55996 | ND |
| 2019-02-26 | AE56002 | ND |
| 2019-02-26 | AE56004 | ND |
| 2020-02-12 | AE98142 | ND |
| 2020-02-12 | AE98144 | ND |
| 2020-02-12 | AE98146 | ND |
| 2020-02-12 | AE98190 | ND |
| 2021-01-27 | AF41351 | ND |
| 2021-01-27 | AF41361 | ND |
| 2021-01-27 | AF41359 | ND |
| 2021-01-27 | AF41357 | ND |
| 2022-02-09 | AF84010 | ND |
| 2022-02-09 | AF84012 | ND |
| 2022-02-09 | AF84014 | ND |
| 2022-02-09 | AF84016 | ND |
| 2023-02-16 | AG29345 | ND |
| 2023-02-16 | AG29347 | ND |
| 2023-02-16 | AG29357 | ND |
| 2023-05-30 | AG42342 | ND |