1,2,4-Trichlorobenzene
City of Idaho Falls
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 | 2 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 9 | 0 | ND |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | N/A | 0 | 0 | N/A |
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 |
|---|---|---|
| 2018-09-18 | VB18091727001 | ND |
| 2018-10-10 | VB18101095001 | ND |
| 2019-03-25 | VB19032049001 | ND |
| 2019-04-16 | VB19041514001 | ND |
| 2020-07-08 | VB20070749001 | ND |
| 2021-08-02 | VB21080203008 | ND |
| 2021-08-02 | VB21080203005 | ND |
| 2021-08-02 | VB21080203002 | ND |
| 2021-08-02 | VB21080203003 | ND |
| 2021-08-02 | VB21080203001 | ND |
| 2021-08-02 | VB21080203007 | ND |
| 2021-08-02 | VB21080203009 | ND |
| 2021-08-02 | VB21080203004 | ND |
| 2021-08-02 | VB21080203006 | ND |