2,4,5-TP (Silvex)
Manville WSC
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 | ND | 2 | 0 | ND |
2017 | ND | 5 | 0 | ND |
2018 | N/A | 0 | 0 | N/A |
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 |
---|---|---|
2014-03-11 | AC46562 | ND |
2014-03-11 | AC46567 | ND |
2014-03-11 | AC46563 | ND |
2014-06-18 | AC57314 | ND |
2014-06-18 | AC57315 | ND |
2016-04-25 | AD34060 | ND |
2016-04-25 | AD34061 | ND |
2017-01-23 | AD66184 | ND |
2017-01-23 | AD66185 | ND |
2017-04-27 | AD81572 | ND |
2017-04-27 | AD81571 | ND |
2017-04-27 | AD81576 | ND |
2019-09-12 | AE83330 | ND |
2019-09-30 | AE85184 | ND |