1,2,4-Trichlorobenzene
City of Milwaukie
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 | 9 | 0 | ND |
| 2019 | ND | 9 | 0 | ND |
| 2020 | ND | 10 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | ND | 3 | 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 |
|---|---|---|
| 2018-05-03 | 812302006-V | ND |
| 2018-05-03 | 812302008-V | ND |
| 2018-05-03 | 812302003-V | ND |
| 2018-08-02 | 821402203-V | ND |
| 2018-08-02 | 821402206-V | ND |
| 2018-08-02 | 821402208-V | ND |
| 2018-11-15 | 831901503-V | ND |
| 2018-11-15 | 831901506-V | ND |
| 2018-11-15 | 831901508-V | ND |
| 2019-02-13 | 904402103-V | ND |
| 2019-02-13 | 904402106-V | ND |
| 2019-02-13 | 904402108-V | ND |
| 2019-05-16 | 913601702-V | ND |
| 2019-05-16 | 913601705-V | ND |
| 2019-05-16 | 913601707-V | ND |
| 2019-12-02 | 933702403-V | ND |
| 2019-12-02 | 933702401-V | ND |
| 2019-12-02 | 933702402-V | ND |
| 2020-03-03 | 006302603-V | ND |
| 2020-03-03 | 006302601-V | ND |
| 2020-03-03 | 006302602-V | ND |
| 2020-05-20 | 014200501-V | ND |
| 2020-05-20 | 014200503-V | ND |
| 2020-05-20 | 014200502-V | ND |
| 2020-09-02 | 024611001-V | ND |
| 2020-09-23 | 026706401-V | ND |
| 2020-09-23 | 026706402-V | ND |
| 2020-10-26 | 030101001-V | ND |
| 2022-09-30 | 2273020-02-V | ND |
| 2022-09-30 | 2273020-01-V | ND |
| 2022-12-06 | 2340023-01-V | ND |
| 2023-01-31 | 3031005-01-V | ND |
| 2023-05-30 | 3150004-01-V | ND |
| 2023-08-22 | 3234010-01-V | ND |
| 2023-10-03 | 3276048-01-V | ND |