2,4,5-TP (Silvex)
Amawalk-shenorock Water District
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 | 4 | 0 | ND |
2015 | N/A | 0 | 0 | N/A |
2016 | ND | 4 | 0 | ND |
2017 | ND | 4 | 0 | ND |
2018 | ND | 4 | 0 | ND |
2019 | ND | 4 | 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 | 35129491001 SOC | ND |
2014-03-10 | 35129491002 SOC | ND |
2014-03-10 | 35129491004 SOC | ND |
2014-03-10 | 35129491003 SOC | ND |
2016-03-09 | 35233772003 SOC | ND |
2016-03-09 | 35233772001 SOC | ND |
2016-03-09 | 35233772002 SOC | ND |
2016-03-09 | 35233772004 SOC | ND |
2017-02-28 | 35298645001-SOCS | ND |
2017-02-28 | 35298645003-SOCS | ND |
2017-02-28 | 35298645004-SOCS | ND |
2017-02-28 | 35298645002-SOCS | ND |
2018-02-12 | 420-1328041 SG1 | ND |
2018-02-12 | 420-1328041 SG4 | ND |
2018-02-12 | 420-1328041 ME1 | ND |
2018-02-12 | 420-1328041 SG3 | ND |
2019-02-27 | 7081061002 SOCS | ND |
2019-02-27 | 7081061001 SOCS | ND |
2019-02-27 | 7081061003 SOCS | ND |
2019-02-27 | 7081061004 SOCS | ND |