2,4,5-TP (Silvex)
Westchester Joint Water Works
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 | 3 | 0 | ND |
2015 | ND | 3 | 0 | ND |
2016 | ND | 2 | 0 | ND |
2017 | ND | 3 | 0 | ND |
2018 | ND | 3 | 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 |
---|---|---|
2014-03-17 | AQ04609SOC | ND |
2014-10-23 | AQ22037SOC | ND |
2014-12-01 | AQ2457SOC | ND |
2015-10-27 | AR23194SOC | ND |
2015-10-27 | AR23193SOC | ND |
2015-10-27 | AR23195SOC | ND |
2016-09-06 | AS19150SOC WJWW | ND |
2016-10-25 | AS22840 | ND |
2017-10-30 | AT22858SOC | ND |
2017-11-13 | AT23824SOC-WJWW | ND |
2017-11-13 | AT23822SOC-WJWW | ND |
2018-02-21 | AU03660SOCS | ND |
2018-09-24 | AU20757WJWWSOCS | ND |
2018-10-24 | AU23144SOCS | ND |
2019-10-21 | AV22258SOCS | ND |
2019-11-12 | AV23850WJWW-SOCS | ND |