2,4,5-TP (Silvex)
Stagecoach S/d
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 | 4 | 0 | ND |
2016 | ND | 3 | 0 | ND |
2017 | ND | 1 | 0 | ND |
2018 | ND | 3 | 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 |
---|---|---|
2015-04-14 | ND | |
2015-07-29 | ND | |
2015-07-29 | ND | |
2015-10-07 | ND | |
2016-01-20 | C516140-01 | ND |
2016-05-04 | CZ03433-01 | ND |
2016-07-20 | CZ08476-01 | ND |
2017-04-25 | CA03098-01 | ND |
2018-05-16 | CB03526-01 | ND |
2018-05-16 | CB03527-01 | ND |
2018-07-19 | CB08252-01 | ND |
2019-04-16 | CC04338-01 | ND |