2,4,5-TP (Silvex)
Pennsylvania American Water Company Warren
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 | ND | 1 | 0 | ND |
| 2020 | ND | 8 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 8 | 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 |
|---|---|---|
| 2019-08-27 | 46272501 | ND |
| 2020-04-06 | 22151846.00 | ND |
| 2020-04-15 | 22151874.00 | ND |
| 2020-05-06 | 22347227.00 | ND |
| 2020-05-13 | 22347299.00 | ND |
| 2020-07-08 | 22736960.00 | ND |
| 2020-07-15 | 22736888.00 | ND |
| 2020-08-13 | 22934672.00 | ND |
| 2020-08-19 | 22934700.00 | ND |
| 2023-04-03 | 28837773.00 | ND |
| 2023-04-11 | 28837764.00 | ND |
| 2023-06-06 | 29240275.00 | ND |
| 2023-06-13 | 29240303.00 | ND |
| 2023-08-15 | 29636974.00 | ND |
| 2023-08-16 | 29637005.00 | ND |
| 2023-09-05 | 29827542.00 | ND |
| 2023-09-12 | 29827571.00 | ND |