1,2,4-Trichlorobenzene
Lehigh County Authority Allentown Division
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 | 2 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 4 | 0 | ND |
| 2023 | ND | 5 | 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 |
|---|---|---|
| 2018-03-13 | 8023741-01 | ND |
| 2018-03-13 | 8023741-02 | ND |
| 2019-03-19 | 9024667-02 | ND |
| 2019-03-19 | 9024667-01 | ND |
| 2020-03-04 | 21896263.00 | ND |
| 2020-03-11 | 21896284.00 | ND |
| 2020-03-18 | 21896333.00 | ND |
| 2020-03-18 | 21896309.00 | ND |
| 2021-01-06 | 23762406.00 | ND |
| 2021-01-13 | 23762429.00 | ND |
| 2021-01-20 | 23762452.00 | ND |
| 2021-01-20 | 23762475.00 | ND |
| 2022-01-10 | 25992196.00 | ND |
| 2022-01-19 | 25992217.00 | ND |
| 2022-01-25 | 25992240.00 | ND |
| 2022-01-25 | 25992261.00 | ND |
| 2023-01-04 | 28221617.00 | ND |
| 2023-01-09 | 28221640.00 | ND |
| 2023-01-18 | 28221663.00 | ND |
| 2023-01-18 | 28221686.00 | ND |
| 2023-02-22 | 28396006.00 | ND |