2,4,5-TP (Silvex)
Cassatt Water Kershaw-lee Company RWA
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 | 6 | 0 | ND |
2015 | N/A | 0 | 0 | N/A |
2016 | ND | 11 | 0 | ND |
2017 | N/A | 0 | 0 | N/A |
2018 | N/A | 0 | 0 | N/A |
2019 | ND | 12 | 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 |
---|---|---|
2014-01-22 | AD34864 | ND |
2014-01-22 | AD34860 | ND |
2014-04-23 | AD38844 | ND |
2014-04-23 | AD38845 | ND |
2014-08-13 | AD44050 | ND |
2014-10-30 | AD47415 | ND |
2016-04-19 | AD74644 | ND |
2016-04-19 | AD74643 | ND |
2016-04-19 | AD74641 | ND |
2016-04-19 | AD74642 | ND |
2016-04-25 | AD74831 | ND |
2016-04-25 | AD74828 | ND |
2016-04-25 | AD74829 | ND |
2016-04-25 | AD74830 | ND |
2016-04-25 | AD74832 | ND |
2016-09-15 | AD82548 | ND |
2016-09-19 | AD82888 | ND |
2019-04-24 | AE29261 | ND |
2019-04-24 | AE29257 | ND |
2019-04-24 | AE29260 | ND |
2019-04-24 | AE29258 | ND |
2019-05-01 | AE29691 | ND |
2019-05-01 | AE29688 | ND |
2019-05-01 | AE29692 | ND |
2019-05-01 | AE29689 | ND |
2019-05-01 | AE29686 | ND |
2019-05-01 | AE29685 | ND |
2019-05-01 | AE29684 | ND |
2019-05-01 | AE29682 | ND |