1,2,4-Trichlorobenzene
City of Coeur D Alene
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 | 1 | 0 | ND |
| 2019 | ND | 3 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 9 | 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 |
|---|---|---|
| 2018-07-16 | V195339 | ND |
| 2019-05-29 | V204289 | ND |
| 2019-05-29 | V204292 | ND |
| 2019-06-03 | V204364 | ND |
| 2020-07-20 | V218126 | ND |
| 2021-07-20 | V2021070360 | ND |
| 2022-03-22 | V202203039802 | ND |
| 2022-04-26 | V202204048802 | ND |
| 2022-04-27 | V2022040546 | ND |
| 2022-04-27 | V2022040529 | ND |
| 2022-05-02 | V202205003001 | ND |
| 2022-05-02 | V2022050013 | ND |
| 2022-05-02 | V2022050007 | ND |
| 2022-07-12 | V202207029502 | ND |
| 2022-10-31 | V202210064202 | ND |
| 2023-02-13 | V202302018702 | ND |
| 2023-05-16 | V202305031902 | ND |