2,4,5-TP (Silvex)
Westchester County WD #2
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 | 1 | 0 | ND |
2015 | ND | 1 | 0 | ND |
2016 | ND | 1 | 0 | ND |
2017 | ND | 3 | 0 | ND |
2018 | ND | 1 | 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 |
---|---|---|
2014-06-05 | 1406525-001 SOC | ND |
2015-06-17 | 1506G79-001 SOC | ND |
2016-05-13 | 1605C84-001 SOC | ND |
2017-06-15 | 7021782001 SOC | ND |
2017-08-04 | 7026292 SOC RESA | ND |
2017-10-19 | 7033697001 SOC R | ND |
2018-05-11 | 7051465001 SOCS | ND |
2019-05-31 | 7091709001 SOCS | ND |