1,2,4-Trichlorobenzene
Wakefield S/d
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 | 5 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 3 | 0 | ND |
| 2022 | ND | 5 | 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 |
|---|---|---|
| 2018-02-01 | CA18486-01 | ND |
| 2018-02-07 | CB01811-01 | ND |
| 2018-04-09 | CB03583-01 | ND |
| 2018-08-07 | CB08292-01 | ND |
| 2018-10-23 | CB14448-01 | ND |
| 2019-04-18 | CC04378-01 | ND |
| 2019-09-10 | CC10717-01 | ND |
| 2020-02-27 | CC20164-01 | ND |
| 2020-05-26 | CD03273-01 | ND |
| 2020-09-21 | CD08401-01 | ND |
| 2020-12-09 | CD13800-01 | ND |
| 2021-01-18 | CD18814-01 | ND |
| 2021-08-11 | CE07664-01 | ND |
| 2021-10-26 | CE13416-01 | ND |
| 2022-01-26 | CE18018-01 | ND |
| 2022-01-26 | CE18018-03_A | ND |
| 2022-05-11 | CF02515-01_A | ND |
| 2022-07-18 | CF07193-01 | ND |
| 2022-10-10 | CF12834-01 | ND |
| 2023-01-23 | 752-1587-1 | ND |
| 2023-04-24 | 37729_23-20468 | ND |
| 2023-08-03 | 37729_23-42292 | ND |
| 2023-10-18 | 37729_23-59590 | ND |