1,2,4-Trichlorobenzene
City of Wilsonville
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 | 3 | 0 | ND |
| 2022 | ND | 2 | 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 |
|---|---|---|
| 2018-01-10 | 201712040042-V | ND |
| 2018-04-11 | 201803050004-V | ND |
| 2018-07-18 | 201807190944-V | ND |
| 2018-10-10 | 201809030045-V | ND |
| 2019-01-09 | 201812030009-V | ND |
| 2019-04-10 | 201904110241-V | ND |
| 2019-07-10 | 201907110430-V | ND |
| 2019-10-08 | 201910090408-V | ND |
| 2020-01-02 | 202001030119-V | ND |
| 2020-04-15 | 202004160157-V | ND |
| 2020-07-15 | 202007160188-V | ND |
| 2020-10-14 | 202010150105-V | ND |
| 2021-01-06 | 202101070374-V | ND |
| 2021-04-14 | 202104150878-V | ND |
| 2021-07-27 | 202107280247-V | ND |
| 2022-02-02 | 202202030907-V | ND |
| 2022-04-13 | 202204140832-V | ND |
| 2023-01-11 | 380-34174-2-V | ND |
| 2023-04-05 | 380-42711-2-V | ND |