2,4,5-TP (Silvex)
Pennsylvania American Royersford
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.
20
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | ND | 10 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | ND | 10 | 0 | ND |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
ppb = parts per billion
State and national drinking water standards and health guidelines
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 |
|---|---|---|
| 2014-04-02 | 25339901 | ND |
| 2014-04-02 | 25340101 | ND |
| 2014-04-03 | 25339801 | ND |
| 2014-04-03 | 25340201 | ND |
| 2014-06-25 | 25340401 | ND |
| 2014-08-05 | 26516601 | ND |
| 2014-08-05 | 26516201 | ND |
| 2014-08-06 | 26516401 | ND |
| 2014-08-06 | 26516701 | ND |
| 2014-08-12 | 26516501 | ND |
| 2017-04-11 | 15931563 | ND |
| 2017-04-11 | 15931533 | ND |
| 2017-04-11 | 15931505 | ND |
| 2017-04-11 | 15931477 | ND |
| 2017-04-11 | 15931449 | ND |
| 2017-08-15 | 16560839 | ND |
| 2017-08-15 | 16560867 | ND |
| 2017-08-15 | 16560811 | ND |
| 2017-08-16 | 16560895 | ND |
| 2017-08-31 | 16721950 | ND |