2,4,5-TP (Silvex)
Water Works District #1 of Vermilion
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 |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | ND | 4 | 0 | ND |
2015 | ND | 8 | 0 | ND |
2016 | ND | 2 | 0 | ND |
2017 | ND | 12 | 0 | ND |
2018 | N/A | 0 | 0 | N/A |
2019 | ND | 4 | 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 |
---|---|---|
2014-07-28 | AD94337 | ND |
2014-07-28 | AD94336 | ND |
2014-07-28 | AD94337 | ND |
2014-07-28 | AD94336 | ND |
2015-01-05 | AE00776 | ND |
2015-01-05 | AE00774 | ND |
2015-01-05 | AE00775 | ND |
2015-01-05 | AE00776 | ND |
2015-01-05 | AE00777 | ND |
2015-01-05 | AE00775 | ND |
2015-01-05 | AE00774 | ND |
2015-01-05 | AE00777 | ND |
2016-08-08 | 35259258003 | ND |
2016-08-08 | 35259258003 | ND |
2017-07-10 | 35323637004 | ND |
2017-07-10 | 35323637005 | ND |
2017-07-10 | 35323637005 | ND |
2017-07-10 | 35323637004 | ND |
2017-11-27 | 35350949004 | ND |
2017-11-27 | 35350949004 | ND |
2017-11-27 | 35350949003 | ND |
2017-11-27 | 35350949002 | ND |
2017-11-27 | 35350949001 | ND |
2017-11-27 | 35350949001 | ND |
2017-11-27 | 35350949002 | ND |
2017-11-27 | 35350949003 | ND |
2019-06-10 | 35474976001 | ND |
2019-06-10 | 35474976001 | ND |
2019-08-08 | 35489061001 | ND |
2019-08-08 | 35489061001 | ND |