2,4,5-TP (Silvex)
Fort Leonard Wood
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.
15
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 | 1 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 1 | 0 | ND |
| 2018 | ND | 10 | 0 | ND |
| 2019 | ND | 1 | 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 |
|---|---|---|
| 2014-06-08 | AC23720 | ND |
| 2015-05-26 | AC47090 | ND |
| 2016-05-23 | AC72590 | ND |
| 2017-05-30 | AC96300 | ND |
| 2018-05-01 | AD18432 | ND |
| 2018-05-01 | AD18431 | ND |
| 2018-05-01 | AD18437 | ND |
| 2018-05-01 | AD18429 | ND |
| 2018-05-01 | AD18433 | ND |
| 2018-05-01 | AD18435 | ND |
| 2018-05-01 | AD18434 | ND |
| 2018-05-01 | AD18436 | ND |
| 2018-05-20 | AD20841 | ND |
| 2018-08-27 | AD32400 | ND |
| 2019-05-28 | AD47808 | ND |