1,2,4-Trichlorobenzene
Shady Harbor Fire District
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 | 1 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 1 | 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 |
|---|---|---|
| 2018-04-24 | 1801832-03_TO12 | ND |
| 2018-04-24 | 1801832-01_TO12 | ND |
| 2018-04-24 | 1801832-04_TO12 | ND |
| 2018-04-24 | 1801832-02_TO12 | ND |
| 2019-04-26 | 1901821-03_TO12 | ND |
| 2020-04-29 | 2001792-04_TO12 | ND |
| 2021-04-12 | 2101744-01_TO12 | ND |
| 2021-04-12 | 2101744-02_TO12 | ND |
| 2021-04-12 | 2101744-03_TO12 | ND |
| 2021-04-12 | 2101744-04_TO12 | ND |
| 2022-04-27 | 2201737-04_TO12 | ND |
| 2023-04-25 | 2301874-04_TO12 | ND |