1,2,4-Trichlorobenzene
Duncannon Municipal Water
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 | 1 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 6 | 0 | ND |
| 2022 | ND | 1 | 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 |
|---|---|---|
| 2018-08-22 | 8H23016-02 | ND |
| 2018-11-13 | 8K15056-01 | ND |
| 2019-08-19 | 9080661-01 | ND |
| 2020-03-30 | 21991350.00 | ND |
| 2020-03-30 | 21991351.00 | ND |
| 2020-03-30 | 21991352.00 | ND |
| 2020-08-04 | 22967113.00 | ND |
| 2021-02-15 | 24027734.00 | ND |
| 2021-03-08 | 24214567.00 | ND |
| 2021-03-22 | 24214634.00 | ND |
| 2021-06-01 | 24798976.00 | ND |
| 2021-08-03 | 25189155.00 | ND |
| 2021-12-28 | 25914142.00 | ND |
| 2022-10-26 | 27795512.00 | ND |
| 2023-07-31 | 29465053.00 | ND |
| 2023-07-31 | 29465022.00 | ND |
| 2023-07-31 | 29465073.00 | ND |
| 2023-07-31 | 29465002.00 | ND |