2,4,5-TP (Silvex)
Daphne
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 | N/A | 0 | 0 | N/A |
2015 | N/A | 0 | 0 | N/A |
2016 | ND | 14 | 0 | ND |
2017 | N/A | 0 | 0 | N/A |
2018 | ND | 2 | 0 | ND |
2019 | ND | 14 | 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 |
---|---|---|
2016-01-13 | 160114023-2 | ND |
2016-01-13 | 160114023-4 | ND |
2016-01-13 | 160114023-1 | ND |
2016-01-13 | 160114023-3 | ND |
2016-04-13 | 160414034-6 | ND |
2016-04-13 | 160414034-1 | ND |
2016-04-13 | 160414034-2 | ND |
2016-04-13 | 160414034-5 | ND |
2016-04-13 | 160414034-3 | ND |
2016-04-13 | 160414034-4 | ND |
2016-04-13 | 160413097-1 | ND |
2016-07-13 | 160714055-3 | ND |
2016-07-13 | 160714055-2 | ND |
2016-07-13 | 160714055-1 | ND |
2018-09-25 | 18090666-001C | ND |
2018-11-05 | 18110114-001C | ND |
2019-01-16 | 19010493-003C | ND |
2019-01-16 | 19010493-001C | ND |
2019-01-16 | 19010493-002C | ND |
2019-04-08 | 19040337-001A | ND |
2019-04-08 | 19040337-002A | ND |
2019-06-13 | 20108289002_ISOC | ND |
2019-06-13 | 20108289001_ISOC | ND |
2019-06-13 | 20108289003_ISOC | ND |
2019-09-12 | 20121489001_ISOC | ND |
2019-09-12 | 20121489002_ISOC | ND |
2019-09-12 | 20121489003_ISOC | ND |
2019-10-14 | 20126124001_ISOC | ND |
2019-10-14 | 20126124002_ISOC | ND |
2019-11-18 | 20131097001_ISOC | ND |