2,4,5-TP (Silvex)
Butler County Water Authority
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 | 8 | 0 | ND |
2017 | N/A | 0 | 0 | N/A |
2018 | N/A | 0 | 0 | N/A |
2019 | ND | 8 | 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 |
---|---|---|
2016-01-14 | 160114061-4 | ND |
2016-01-14 | 160114061-3 | ND |
2016-01-14 | 160114061-1 | ND |
2016-01-14 | 160114061-2 | ND |
2016-04-11 | 160412001-3 | ND |
2016-04-11 | 160412001-2 | ND |
2016-04-11 | 160412001-4 | ND |
2016-04-11 | 160412001-1 | ND |
2019-01-17 | 19010517-002C | ND |
2019-01-17 | 19010517-001C | ND |
2019-05-30 | 20105982001_ISOC | ND |
2019-05-30 | 20105982002_ISOC | ND |
2019-06-20 | 20109311001_ISOC | ND |
2019-06-20 | 20109311002_ISOC | ND |
2019-07-11 | 20112547002_ISOC | ND |
2019-07-11 | 20112547001_ISOC | ND |