2,4,5-TP (Silvex)
McAlester PWA
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 | N/A | 0 | 0 | N/A |
2015 | ND | 2 | 0 | ND |
2016 | N/A | 0 | 0 | N/A |
2017 | ND | 2 | 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 |
---|---|---|
2015-03-09 | 542701 | ND |
2015-07-09 | 545372 | ND |
2017-09-13 | 7I13107-01 | ND |
2017-11-15 | 7K15030-01 | ND |
2018-03-21 | SDWA-1239859-00 | ND |
2018-07-10 | SDWA-1279274-00 | ND |
2018-08-30 | AH30096-05 | ND |
2019-02-27 | BB27027-01 | ND |
2019-04-24 | BD24026-01 | ND |