2,4,5-TP (Silvex)
Collegeville Trappe Joint Public Works Department
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.
28
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 | 14 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | ND | 14 | 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 |
|---|---|---|
| 2014-05-05 | 14041898-01 | ND |
| 2014-05-05 | 14041904-01 | ND |
| 2014-05-05 | 14041899-01 | ND |
| 2014-05-05 | 14041903-01 | ND |
| 2014-05-05 | 14041900-01 | ND |
| 2014-05-05 | 14041901-01 | ND |
| 2014-06-16 | 14060587-01 | ND |
| 2014-07-21 | 14072520-001 | ND |
| 2014-07-21 | 14072517-001 | ND |
| 2014-07-21 | 14072515-001 | ND |
| 2014-08-04 | 14080380-001 | ND |
| 2014-08-04 | 14080381-001 | ND |
| 2014-08-04 | 14080382-001 | ND |
| 2014-08-04 | 14080383-001 | ND |
| 2017-05-01 | 16093096 | ND |
| 2017-05-01 | 16093068 | ND |
| 2017-05-01 | 16093040 | ND |
| 2017-05-01 | 16093012 | ND |
| 2017-05-01 | 16092984 | ND |
| 2017-05-01 | 16092956 | ND |
| 2017-05-01 | 16092928 | ND |
| 2017-08-01 | 16564159 | ND |
| 2017-08-01 | 16564189 | ND |
| 2017-08-01 | 16564219 | ND |
| 2017-08-01 | 16564129 | ND |
| 2017-08-01 | 16564249 | ND |
| 2017-08-01 | 16564268 | ND |
| 2017-08-01 | 16564089 | ND |