2,4,5-TP (Silvex)
Wiggin Farm Winterberry
NOTE: Wiggin Farm Winterberry purchases water from Aquarion Water - NH which is required to test for 2,4,5-tp (silvex). Sample information shown below was taken by Aquarion Water - NH.
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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | ND | 1 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 1 | 0 | ND |
| 2018 | ND | 2 | 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
NOTE: Wiggin Farm Winterberry purchases water from Aquarion Water - NH which is required to test for 2,4,5-tp (silvex). Sample information shown below was taken by Aquarion Water - NH.
| Date | Lab ID | Result |
|---|---|---|
| 2014-04-01 | BG28084 | ND |
| 2014-07-21 | 133855.01 | ND |
| 2014-07-21 | 133855.03 | ND |
| 2015-04-07 | 142026.02 | ND |
| 2015-07-14 | 145726.05 | ND |
| 2015-07-14 | 145726.08 | ND |
| 2016-04-05 | 154457.02 | ND |
| 2016-07-19 | 158472.02 | ND |
| 2016-07-19 | 158472.01 | ND |
| 2016-07-20 | 158545.02 | ND |
| 2016-07-20 | 158545.01 | ND |
| 2016-07-26 | 158731.01 | ND |
| 2016-07-26 | 158731.02 | ND |
| 2016-07-27 | 158731.05 | ND |
| 2016-08-02 | 158986.01 | ND |
| 2016-08-02 | 158986.02 | ND |
| 2017-04-05 | 167241.01 | ND |
| 2018-04-10 | 180567.02 | ND |
| 2018-08-15 | 185555.01 | ND |
| 2019-04-02 | 193725.02 | ND |
| 2019-07-09 | 197747.03 | ND |