2,4,5-TP (Silvex)
Hampshire
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 | ND | 2 | 0 | ND |
2015 | ND | 4 | 0 | ND |
2016 | N/A | 0 | 0 | N/A |
2017 | N/A | 0 | 0 | N/A |
2018 | ND | 4 | 0 | ND |
2019 | ND | 3 | 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 |
---|---|---|
2014-03-07 | 1403301-001A | ND |
2014-06-11 | 1406676-001A | ND |
2015-03-04 | 1503337-001C | ND |
2015-06-03 | 1506282-001C | ND |
2015-08-04 | 1508355-001C | ND |
2015-12-02 | 1512167-001C | ND |
2018-02-07 | 1802439-001C | ND |
2018-08-15 | 8083010-01 | ND |
2018-10-03 | 8100932-01 | ND |
2018-10-16 | 18J0540-01_02 | ND |
2019-10-02 | 9100630-01 | ND |
2019-11-13 | 9112257-01 | ND |
2019-11-21 | 9114054-01 | ND |