2,4,5-TP (Silvex)
Branson
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.
19
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 | 2 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 9 | 0 | ND |
| 2019 | ND | 2 | 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 |
|---|---|---|
| 2014-06-02 | AC23729 | ND |
| 2014-06-02 | AC23728 | ND |
| 2015-06-01 | AC47099 | ND |
| 2015-06-01 | AC47098 | ND |
| 2016-06-01 | AC72599 | ND |
| 2016-06-01 | AC72598 | ND |
| 2017-05-30 | AC96310 | ND |
| 2017-05-30 | AC96311 | ND |
| 2018-05-23 | AD20850 | ND |
| 2018-05-23 | AD20849 | ND |
| 2018-06-19 | AD27847 | ND |
| 2018-06-19 | AD27849 | ND |
| 2018-06-19 | AD27850 | ND |
| 2018-06-19 | AD27851 | ND |
| 2018-06-19 | AD27852 | ND |
| 2018-08-27 | AD32404 | ND |
| 2018-08-27 | AD32405 | ND |
| 2019-05-29 | AD47816 | ND |
| 2019-05-29 | AD47817 | ND |