2,4,5-TP (Silvex)
East Hempfield Water Authority
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 |
|---|---|---|---|---|
| 2014 | ND | 12 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | ND | 12 | 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 |
|---|---|---|
| 2014-05-21 | 14030670-01 | ND |
| 2014-05-21 | 14030680-01 | ND |
| 2014-05-21 | 14030683-01 | ND |
| 2014-05-21 | 14030690-01 | ND |
| 2014-05-21 | 14030693-01 | ND |
| 2014-05-21 | 14030695-01 | ND |
| 2014-08-20 | 14030681-01 | ND |
| 2014-08-20 | 14030684-01 | ND |
| 2014-08-20 | 14030692-01 | ND |
| 2014-08-20 | 14030694-01 | ND |
| 2014-08-20 | 14030696-01 | ND |
| 2014-08-20 | 14030672-01 | ND |
| 2017-04-17 | 16218419 | ND |
| 2017-04-17 | 16218389 | ND |
| 2017-04-17 | 16218359 | ND |
| 2017-04-17 | 16218329 | ND |
| 2017-06-12 | 16378304 | ND |
| 2017-06-12 | 16378274 | ND |
| 2017-08-25 | 16844393 | ND |
| 2017-08-25 | 16844391 | ND |
| 2017-08-25 | 16844390 | ND |
| 2017-08-25 | 16844392 | ND |
| 2017-08-25 | 16844394 | ND |
| 2017-08-25 | 16844389 | ND |