2,4,5-TP (Silvex)
Western Greene
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | N/A | 0 | 0 | N/A |
2015 | N/A | 0 | 0 | N/A |
2016 | ND | 5 | 0 | ND |
2017 | ND | 3 | 0 | ND |
2018 | N/A | 0 | 0 | N/A |
2019 | ND | 6 | 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 |
---|---|---|
2016-02-16 | 16049006302 | ND |
2016-02-16 | 16049006202 | ND |
2016-05-02 | 16126004802 | ND |
2016-05-02 | 16126004402 | ND |
2016-11-21 | 16328000702 | ND |
2017-01-11 | 17012006802 | ND |
2017-05-09 | 17130006302 | ND |
2017-07-18 | 17200000802 | ND |
2019-02-20 | 19052008402 | ND |
2019-02-20 | 19052008302 | ND |
2019-04-09 | 19101009002 | ND |
2019-04-09 | 19101008902 | ND |
2019-08-07 | 19220013602 | ND |
2019-10-09 | 19283013502 | ND |