1,2,4-Trichlorobenzene
City of Hallettsville
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 | 3 | 0 | ND |
| 2019 | ND | 3 | 0 | ND |
| 2020 | ND | 3 | 0 | ND |
| 2021 | ND | 5 | 0 | ND |
| 2022 | ND | 3 | 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 |
|---|---|---|
| 2018-09-19 | AE40773 | ND |
| 2018-09-19 | AE40775 | ND |
| 2018-09-19 | AE40759 | ND |
| 2019-08-22 | AE80240 | ND |
| 2019-08-22 | AE80242 | ND |
| 2019-08-22 | AE80246 | ND |
| 2020-05-19 | AF11753 | ND |
| 2020-05-19 | AF11755 | ND |
| 2020-05-19 | AF11757 | ND |
| 2021-06-10 | AF57493 | ND |
| 2021-06-10 | AF57525 | ND |
| 2021-06-10 | AF57491 | ND |
| 2021-07-27 | AF63450 | ND |
| 2021-11-03 | AF75593 | ND |
| 2022-08-04 | AG07869 | ND |
| 2022-08-04 | AG07873 | ND |
| 2022-08-04 | AG07875 | ND |
| 2023-03-06 | Q2309810001 | ND |
| 2023-03-06 | Q2309810003 | ND |
| 2023-03-06 | Q2309810005 | ND |