2,4,5-TP (Silvex)
City of Chubbuck
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 |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | N/A | 0 | 0 | N/A |
2015 | N/A | 0 | 0 | N/A |
2016 | ND | 1 | 0 | ND |
2017 | ND | 4 | 0 | ND |
2018 | ND | 1 | 0 | ND |
2019 | ND | 9 | 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 |
---|---|---|
2016-11-30 | SI61120201 | ND |
2017-03-09 | SI70308001 | ND |
2017-06-01 | SI70600802 | ND |
2017-08-22 | SI70821201 | ND |
2017-11-07 | SI171105101 | ND |
2018-02-21 | SI80212801 | ND |
2019-03-28 | SI90320401 | ND |
2019-04-10 | SI90408601 | ND |
2019-06-04 | SI90604901 | ND |
2019-07-10 | SI90712501 | ND |
2019-07-24 | SI90732001 | ND |
2019-07-25 | SI90734601 | ND |
2019-09-04 | SI90903501 | ND |
2019-10-31 | SI91031701 | ND |
2019-11-05 | SI91102401 | ND |