2,4,5-TP (Silvex)
Eugene Water & Electric Board
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 | ND | 4 | 0 | ND |
2015 | ND | 4 | 0 | ND |
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 |
---|---|---|
2014-01-08 | 140119301A-S | ND |
2014-04-02 | 140411201A-S | ND |
2014-07-07 | 140718401A-S | ND |
2014-10-07 | 141025501A-S | ND |
2015-01-07 | 150117901A-S | ND |
2015-04-08 | 150427901A-S | ND |
2015-07-01 | 150706201A-S | ND |
2015-10-07 | 151030501A-S | ND |
2016-01-04 | 160104501A-S | ND |
2016-04-06 | 160425201A-S | ND |
2016-07-06 | 160721601A-S | ND |
2016-10-05 | 161020901A-S | ND |
2017-01-04 | 170105601A-S | ND |
2017-04-05 | 170419001A-S | ND |
2017-07-05 | 170711501A-S | ND |
2017-10-04 | 171019901A-S | ND |
2018-02-06 | 180223101A-S | ND |
2018-05-09 | 180543001A-S | ND |
2018-08-01 | 180809401A-S | ND |
2018-11-07 | 201811080534-S | ND |
2019-02-04 | 201902050084-S | ND |
2019-05-13 | 201905140039-S | ND |
2019-08-05 | 201908060215-S | ND |
2019-11-04 | 201911051086-S | ND |