2,4,5-TP (Silvex)
Perkasie Regional Authority
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 | N/A | 0 | 0 | N/A |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 16 | 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 |
|---|---|---|
| 2023-05-03 | 28879666.00 | ND |
| 2023-05-03 | 28879667.00 | ND |
| 2023-05-03 | 28879668.00 | ND |
| 2023-05-03 | 28879669.00 | ND |
| 2023-06-27 | 29088396.00 | ND |
| 2023-06-27 | 29088397.00 | ND |
| 2023-06-27 | 29088398.00 | ND |
| 2023-06-27 | 29088395.00 | ND |
| 2023-09-06 | 29681567.00 | ND |
| 2023-09-06 | 29681568.00 | ND |
| 2023-09-06 | 29681569.00 | ND |
| 2023-09-06 | 29681570.00 | ND |
| 2023-12-19 | 30228510.00 | ND |
| 2023-12-19 | 30228511.00 | ND |
| 2023-12-19 | 30228512.00 | ND |
| 2023-12-19 | 30228513.00 | ND |