2,4,5-TP (Silvex)
Aqua Pennsylvania Main System
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.
29
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 | 14 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 13 | 0 | ND |
| 2018 | ND | 1 | 0 | ND |
| 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 |
|---|---|---|
| 2014-04-23 | AE30432 | ND |
| 2014-04-23 | AE30533 | ND |
| 2014-04-23 | AE30433 | ND |
| 2014-04-28 | AE30874 | ND |
| 2014-04-28 | AE30899 | ND |
| 2014-04-29 | AE31042 | ND |
| 2014-07-21 | 2019295001 | ND |
| 2014-07-21 | 2019297001 | ND |
| 2014-07-22 | 2019998001 | ND |
| 2014-07-23 | 2019999001 | ND |
| 2014-07-23 | 2020000001 | ND |
| 2014-07-24 | 2020244001 | ND |
| 2014-07-24 | 2020242001 | ND |
| 2014-11-26 | 2042265001 | ND |
| 2016-08-11 | 14739515 | ND |
| 2017-05-15 | 16098303 | ND |
| 2017-05-15 | 16098322 | ND |
| 2017-05-15 | 16098284 | ND |
| 2017-05-17 | 16098378 | ND |
| 2017-05-17 | 16098350 | ND |
| 2017-05-17 | 16098406 | ND |
| 2017-05-25 | 16099739 | ND |
| 2017-08-14 | 16569899 | ND |
| 2017-08-14 | 16569955 | ND |
| 2017-08-15 | 16569927 | ND |
| 2017-08-16 | 16571282 | ND |
| 2017-08-16 | 16571224 | ND |
| 2017-08-16 | 16571253 | ND |
| 2018-01-15 | 2288832001 | ND |