1,2,4-Trichlorobenzene
Mccoll, Town of
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 | 6 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 4 | 0 | ND |
| 2023 | ND | 3 | 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 |
|---|---|---|
| 2018-03-12 | AE09098 | ND |
| 2018-03-12 | AE09099 | ND |
| 2018-06-05 | AE13175 | ND |
| 2018-08-07 | AE16322 | ND |
| 2018-08-07 | AE16323 | ND |
| 2018-10-24 | AE20396 | ND |
| 2020-02-04 | AE43956 | ND |
| 2020-05-04 | AE47957 | ND |
| 2020-09-01 | AE53880 | ND |
| 2020-12-01 | AE58179 | ND |
| 2021-02-22 | AE61569 | ND |
| 2021-04-12 | AE63953 | ND |
| 2021-09-08 | AE71526 | ND |
| 2021-11-29 | AE75569 | ND |
| 2022-03-09 | AE80505 | ND |
| 2022-06-27 | AE85787 | ND |
| 2022-08-24 | AE88851 | ND |
| 2022-11-16 | AE93077 | ND |
| 2023-01-19 | AE95775 | ND |
| 2023-05-15 | AF01825 | ND |
| 2023-07-13 | AF05499 | ND |