2,4,5-TP (Silvex)
Erie County Water Authority (ECWA)
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 | 2 | 0 | ND |
2016 | ND | 2 | 0 | ND |
2017 | N/A | 0 | 0 | N/A |
2018 | ND | 2 | 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 |
---|---|---|
2014-03-10 | 472423 | ND |
2014-03-10 | 472423_1 | ND |
2015-07-22 | 1507H78-001 | ND |
2015-07-22 | 1507H78-002 | ND |
2016-09-28 | 1609R09-001 | ND |
2016-09-28 | 1609R09-002 | ND |
2018-02-14 | 7043067002 | ND |
2018-02-14 | 7043067001 | ND |
2019-11-25 | 480-163256-1 | ND |
2019-11-25 | 480-163256-2 | ND |