2,4,5-TP (Silvex)
US Army Fort Huachuca
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.
22
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 | N/A | 0 | 0 | N/A |
| 2015 | ND | 9 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 10 | 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 |
|---|---|---|
| 2015-06-25 | 3270539 | ND |
| 2015-06-25 | 3270532 | ND |
| 2015-06-25 | 3270525 | ND |
| 2015-06-25 | 3270518 | ND |
| 2015-11-10 | 3357275 | ND |
| 2015-11-10 | 3357269 | ND |
| 2015-11-10 | 3357263 | ND |
| 2015-11-10 | 3357257 | ND |
| 2015-11-10 | 3357251 | ND |
| 2016-03-17 | 3417063 | ND |
| 2017-03-15 | 3655669 | ND |
| 2017-08-16 | 3761096 | ND |
| 2018-03-19 | 18C1824-05 | ND |
| 2018-03-19 | 18C1824-04 | ND |
| 2018-03-19 | 18C1824-03 | ND |
| 2018-03-19 | 18C1824-02 | ND |
| 2018-03-19 | 18C1824-01 | ND |
| 2018-08-13 | 18H1324-01 | ND |
| 2018-08-13 | 18H1324-05 | ND |
| 2018-08-13 | 18H1324-04 | ND |
| 2018-08-13 | 18H1324-03 | ND |
| 2018-08-13 | 18H1324-02 SOC | ND |