2,4,5-TP (Silvex)
Sycamore
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 | ND | 2 | 0 | ND |
2015 | ND | 4 | 0 | ND |
2016 | N/A | 0 | 0 | N/A |
2017 | ND | 4 | 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 |
---|---|---|
2014-02-05 | SB40146-01_01 | ND |
2014-05-13 | SE40580-01_01 | ND |
2015-01-20 | SA50454-01_01 | ND |
2015-04-14 | SD50434-01_01 | ND |
2015-08-13 | SH50889-01_01 | ND |
2015-10-07 | SJ50343-01_01 | ND |
2017-01-10 | 17A0273-01_01 | ND |
2017-01-10 | 17A0272-01_01 | ND |
2017-05-02 | 17E0088-01_01 | ND |
2017-05-02 | 17E0087-01_01 | ND |