1,2,4-Trichlorobenzene
South Middleton Twp Water Authority
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 | 9 | 0 | ND |
| 2022 | ND | 9 | 0 | ND |
| 2023 | ND | 6 | 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 |
|---|---|---|
| 2018-05-15 | 8052993-01 | ND |
| 2018-05-15 | 8052993-02 | ND |
| 2018-05-15 | 8052993-03 | ND |
| 2019-05-14 | 9052836-02 | ND |
| 2019-05-14 | 9052836-03 | ND |
| 2019-05-14 | 9052836-01 | ND |
| 2020-05-14 | 22355415.00 | ND |
| 2020-05-14 | 22355394.00 | ND |
| 2020-05-14 | 22355373.00 | ND |
| 2021-02-17 | 24007048.00 | ND |
| 2021-02-17 | 24007000.00 | ND |
| 2021-02-17 | 24007024.00 | ND |
| 2021-05-18 | 24579627.00 | ND |
| 2021-05-18 | 24579676.00 | ND |
| 2021-05-18 | 24579652.00 | ND |
| 2021-08-17 | 25164844.00 | ND |
| 2021-08-17 | 25164893.00 | ND |
| 2021-08-17 | 25164869.00 | ND |
| 2022-05-17 | 26788394.00 | ND |
| 2022-05-17 | 26788443.00 | ND |
| 2022-05-17 | 26788419.00 | ND |
| 2022-08-23 | 27587370.00 | ND |
| 2022-08-23 | 27587371.00 | ND |
| 2022-08-23 | 27587369.00 | ND |
| 2022-11-16 | 27948221.00 | ND |
| 2022-11-16 | 27948245.00 | ND |
| 2022-11-16 | 27948196.00 | ND |
| 2023-03-30 | 28650578.00 | ND |
| 2023-03-30 | 28650627.00 | ND |
| 2023-03-30 | 28650603.00 | ND |
| 2023-05-25 | 29247713.00 | ND |
| 2023-05-25 | 29247712.00 | ND |
| 2023-05-25 | 29247711.00 | ND |