2,4,5-TP (Silvex)
Boone County Cons. PWSD1
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 | N/A | 0 | 0 | N/A |
2015 | N/A | 0 | 0 | N/A |
2016 | N/A | 0 | 0 | N/A |
2017 | N/A | 0 | 0 | N/A |
2018 | ND | 18 | 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
Date | Lab ID | Result |
---|---|---|
2018-03-07 | AD14744 | ND |
2018-03-07 | AD14754 | ND |
2018-03-07 | AD14753 | ND |
2018-03-07 | AD14752 | ND |
2018-03-07 | AD14751 | ND |
2018-03-07 | AD14750 | ND |
2018-03-07 | AD14747 | ND |
2018-03-07 | AD14746 | ND |
2018-03-07 | AD14745 | ND |
2018-03-07 | AD14743 | ND |
2018-03-07 | AD14749 | ND |
2018-03-07 | AD14741 | ND |
2018-03-16 | AD17714 | ND |
2018-03-16 | AD17715 | ND |
2018-04-11 | AD18403 | ND |
2018-05-21 | AD20840 | ND |
2018-08-21 | AD31542 | ND |
2018-11-19 | AD36040 | ND |
2019-02-08 | AD39831 | ND |
2019-05-21 | AD47807 | ND |