2,4,5-TP (Silvex)
Pawc Pocono District
2(2,4,5-trichlorophenoxy) propionic acid (2,4,5-TP or Silvex) is a cancer-causing herbicide banned in the U.S. in 1985 because of its toxicity. It is still detected as a groundwater contaminant in areas where it was sprayed or stored.
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 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | ND | 18 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 18 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 3 ppb
The EWG Health Guideline of 3 ppb for 2,4,5-TP 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 harm to internal organs.
EPA Maximum Contaminant
Level (MCL): 50 ppb
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2020-04-16 | 22047153.00 | ND |
| 2020-04-27 | 22047211.00 | ND |
| 2020-04-27 | 22047182.00 | ND |
| 2020-04-29 | 22239154.00 | ND |
| 2020-04-29 | 22239125.00 | ND |
| 2020-04-29 | 22239067.00 | ND |
| 2020-05-04 | 22239096.00 | ND |
| 2020-05-04 | 22239038.00 | ND |
| 2020-05-05 | 22239183.00 | ND |
| 2020-07-08 | 22631012.00 | ND |
| 2020-07-08 | 22630867.00 | ND |
| 2020-07-08 | 22630983.00 | ND |
| 2020-07-13 | 22630809.00 | ND |
| 2020-07-13 | 22630838.00 | ND |
| 2020-07-13 | 22630780.00 | ND |
| 2020-07-14 | 22630954.00 | ND |
| 2020-07-14 | 22630925.00 | ND |
| 2020-07-14 | 22630896.00 | ND |
| 2023-05-10 | 28925562.00 | ND |
| 2023-05-10 | 28925475.00 | ND |
| 2023-05-10 | 28925707.00 | ND |
| 2023-05-10 | 28925678.00 | ND |
| 2023-05-10 | 28925649.00 | ND |
| 2023-05-10 | 28925504.00 | ND |
| 2023-05-10 | 28925620.00 | ND |
| 2023-05-10 | 28925591.00 | ND |
| 2023-05-10 | 28925533.00 | ND |
| 2023-07-19 | 29324777.00 | ND |
| 2023-07-19 | 29324748.00 | ND |
| 2023-07-19 | 29324632.00 | ND |
| 2023-07-19 | 29324825.00 | ND |
| 2023-07-19 | 29324661.00 | ND |
| 2023-07-19 | 29324603.00 | ND |
| 2023-07-19 | 29324854.00 | ND |
| 2023-07-19 | 29324719.00 | ND |
| 2023-07-19 | 29324690.00 | ND |