1,2,4-Trichlorobenzene
Aqua Pa Uwchlan
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 | 7 | 0 | ND |
| 2020 | ND | 6 | 0 | ND |
| 2021 | ND | 6 | 0 | ND |
| 2022 | ND | 7 | 0 | ND |
| 2023 | ND | 8 | 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 |
|---|---|---|
| 2018-01-29 | AF74449 | ND |
| 2018-01-31 | AF73819 | ND |
| 2018-02-26 | AF76934 | ND |
| 2018-02-26 | AF76935 | ND |
| 2018-03-13 | AF77984 | ND |
| 2018-03-13 | AF77985 | ND |
| 2019-03-06 | AG10268 | ND |
| 2019-03-06 | AG10267 | ND |
| 2019-03-06 | AG10266 | ND |
| 2019-03-12 | AG10439 | ND |
| 2019-03-12 | AG10441 | ND |
| 2019-03-27 | AG11746 | ND |
| 2019-11-07 | AG37520 | ND |
| 2020-03-11 | 21837110.00 | ND |
| 2020-03-11 | 21837194.00 | ND |
| 2020-03-11 | 21837152.00 | ND |
| 2020-03-11 | 21837131.00 | ND |
| 2020-03-26 | 21837173.00 | ND |
| 2020-05-21 | 22205091.00 | ND |
| 2021-02-10 | 23880015.00 | ND |
| 2021-02-10 | 23880057.00 | ND |
| 2021-02-10 | 23880036.00 | ND |
| 2021-02-23 | 23880099.00 | ND |
| 2021-02-23 | 23880078.00 | ND |
| 2021-07-09 | 24819007.00 | ND |
| 2022-02-18 | 26109333.00 | ND |
| 2022-02-18 | 26109351.00 | ND |
| 2022-02-18 | 26109284.00 | ND |
| 2022-02-18 | 26109305.00 | ND |
| 2022-02-18 | 26109326.00 | ND |
| 2022-08-03 | 27224135.00 | ND |
| 2022-11-29 | 27814190.00 | ND |
| 2023-02-17 | 28341074.00 | ND |
| 2023-02-27 | 28341095.00 | ND |
| 2023-02-27 | 28341116.00 | ND |
| 2023-03-21 | 28512445.00 | ND |
| 2023-03-21 | 28512424.00 | ND |
| 2023-04-17 | 28692191.00 | ND |
| 2023-05-01 | 28890011.00 | ND |
| 2023-08-29 | 29691261.00 | ND |