1,2,4-Trichlorobenzene
Arbor Hills Water Works
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 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | ND | 8 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 5 | 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 |
|---|---|---|
| 2020-01-15 | CF13838-POCS | ND |
| 2020-01-17 | CF15444-POCS | ND |
| 2020-01-17 | CF15442-POCS | ND |
| 2020-01-17 | CF15443-POCS | ND |
| 2020-01-17 | CF15441-POCS | ND |
| 2020-05-14 | AW08956-POCS | ND |
| 2020-05-14 | AW08958-POCS | ND |
| 2020-10-06 | AW19319-POCS | ND |
| 2021-05-18 | AX09492-POCS | ND |
| 2021-05-18 | AX09490-POCS | ND |
| 2022-04-08 | AY05847-POCS | ND |
| 2022-04-08 | AY05849-POCS | ND |
| 2023-01-19 | 23A1937-23-POCS | ND |
| 2023-01-19 | 23A1937-20-POCS | ND |
| 2023-01-19 | 23A1937-08-POCS | ND |
| 2023-01-19 | 23A1937-17-POCS | ND |
| 2023-12-19 | AZ22865-POC | ND |