2,4,5-TP (Silvex)
Black Mountain, Town of
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 |
|---|---|---|---|---|
| 2014 | ND | 6 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 6 | 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 |
|---|---|---|
| 2014-02-10 | 37729_14-03998 | ND |
| 2014-02-10 | 37729_14-04001 | ND |
| 2014-02-10 | 37729_14-04004 | ND |
| 2014-05-13 | 37729_14-13458 | ND |
| 2014-05-13 | 37729_14-13459 | ND |
| 2014-05-13 | 37729_14-13460 | ND |
| 2015-03-25 | ND | |
| 2015-05-06 | ND | |
| 2016-01-04 | 37729_16-00404 | ND |
| 2017-03-23 | 37729_17-10024 | ND |
| 2017-08-16 | 37729_17-29524 | ND |
| 2017-08-16 | 37729_17-29525 | ND |
| 2017-08-16 | 37729_17-29526 | ND |
| 2017-10-26 | 37729_17-40396 | ND |
| 2017-10-26 | 37729_17-40397 | ND |