2,4,5-TP (Silvex)
City of Buckeye Sonora - Sundance
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 | 6 | 0 | ND |
2015 | ND | 2 | 0 | ND |
2016 | ND | 2 | 0 | ND |
2017 | ND | 4 | 0 | ND |
2018 | N/A | 0 | 0 | N/A |
2019 | N/A | 0 | 0 | N/A |
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 |
---|---|---|
2014-05-07 | 484777-001A | ND |
2014-05-07 | 484934-001A | ND |
2014-09-04 | 492627-001C | ND |
2014-09-04 | 492628-001C | ND |
2014-10-23 | 495554-001B | ND |
2014-10-29 | 496126-001B | ND |
2015-03-12 | 503711-001 | ND |
2015-03-12 | 503712-001 | ND |
2016-02-23 | 525398-001B | ND |
2016-02-24 | 525405-001B | ND |
2017-04-13 | 550767-001 | ND |
2017-04-27 | 551845-001A | ND |
2017-09-27 | 563905-001B | ND |
2017-09-27 | 563906-001B | ND |