2,4,5-TP (Silvex)
Philadelphia Water 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.
24
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 6 | 0 | ND |
| 2015 | ND | 3 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 6 | 0 | ND |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 3 | 0 | ND |
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 |
|---|---|---|
| 2014-04-07 | 7422122 | ND |
| 2014-04-07 | 7422120 | ND |
| 2014-04-07 | 7422118 | ND |
| 2014-08-19 | 7572176 | ND |
| 2014-08-19 | 7572174 | ND |
| 2014-08-19 | 7572178 | ND |
| 2015-06-10 | 12888372 | ND |
| 2015-06-10 | 12888348 | ND |
| 2015-06-10 | 12888324 | ND |
| 2016-06-03 | 14411736 | ND |
| 2016-06-03 | 14411786 | ND |
| 2016-06-03 | 14411761 | ND |
| 2017-05-16 | 16101015 | ND |
| 2017-05-16 | 16100990 | ND |
| 2017-05-16 | 16100965 | ND |
| 2017-07-24 | 16420628 | ND |
| 2017-07-24 | 16420603 | ND |
| 2017-07-24 | 16420653 | ND |
| 2018-06-11 | 8062833-01 | ND |
| 2018-06-11 | 8062834-01 | ND |
| 2018-06-11 | 8062835-01 | ND |
| 2019-06-25 | 9065260-01 | ND |
| 2019-06-25 | 9065261-01 | ND |
| 2019-06-25 | 9065259-01 | ND |