2,4,5-TP (Silvex)
Neosho
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 | 1 | 0 | ND |
2015 | ND | 1 | 0 | ND |
2016 | ND | 1 | 0 | ND |
2017 | ND | 1 | 0 | ND |
2018 | ND | 7 | 0 | ND |
2019 | ND | 1 | 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 |
---|---|---|
2014-05-30 | AC23731 | ND |
2015-05-29 | AC47101 | ND |
2016-05-31 | AC72601 | ND |
2017-05-30 | AC96314 | ND |
2018-05-21 | AD20853 | ND |
2018-05-21 | AD20852 | ND |
2018-05-21 | AD20855 | ND |
2018-07-25 | AD30649 | ND |
2018-07-25 | AD30650 | ND |
2018-08-20 | AD31565 | ND |
2018-08-23 | AD32409 | ND |
2019-05-28 | AD47819 | ND |