2,4,5-TP (Silvex)
Wahiawa
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 | 5 | 0 | ND |
2015 | N/A | 0 | 0 | N/A |
2016 | N/A | 0 | 0 | N/A |
2017 | ND | 6 | 0 | ND |
2018 | ND | 2 | 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 |
---|---|---|
2014-02-03 | 201402050209 | ND |
2014-02-11 | 201402140314 | ND |
2014-08-04 | 201408060611 | ND |
2014-10-20 | 201410220437 | ND |
2014-10-20 | 201410220438 | ND |
2017-01-30 | ND | |
2017-01-30 | ND | |
2017-03-20 | ND | |
2017-03-20 | ND | |
2017-10-31 | ND | |
2017-11-20 | ND | |
2018-04-18 | 201804200571 | ND |
2018-07-11 | 201807140225 | ND |
2019-05-01 | 201903280505 | ND |