2,4,5-TP (Silvex)
Aqua Water Supply Corporation
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 | 12 | 0 | ND |
2015 | N/A | 0 | 0 | N/A |
2016 | N/A | 0 | 0 | N/A |
2017 | ND | 12 | 0 | ND |
2018 | N/A | 0 | 0 | N/A |
2019 | N/A | 0 | 0 | N/A |
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 |
---|---|---|
2014-02-05 | AC41606 | ND |
2014-02-05 | AC41602 | ND |
2014-02-05 | AC41601 | ND |
2014-02-05 | AC41604 | ND |
2014-02-05 | AC41608 | ND |
2014-02-05 | AC41586 | ND |
2014-02-05 | AC41599 | ND |
2014-02-05 | AC41603 | ND |
2014-02-05 | AC41607 | ND |
2014-02-05 | AC41605 | ND |
2014-04-14 | AC50333 | ND |
2014-08-13 | AC63480 | ND |
2017-01-11 | AD64474 | ND |
2017-01-11 | AD64472 | ND |
2017-01-11 | AD64478 | ND |
2017-01-11 | AD64473 | ND |
2017-01-11 | AD64471 | ND |
2017-01-11 | AD64476 | ND |
2017-01-12 | AD64855 | ND |
2017-01-12 | AD64852 | ND |
2017-01-12 | AD64850 | ND |
2017-01-12 | AD64851 | ND |
2017-01-12 | AD64853 | ND |
2017-01-12 | AD64854 | ND |