2,4,5-TP (Silvex)
City of Hastings
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.
21
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
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 | ND | 15 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 3 | 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 |
|---|---|---|
| 2015-01-27 | 343538 | ND |
| 2015-01-27 | 343537 | ND |
| 2015-01-27 | 343535 | ND |
| 2015-01-27 | 343534 | ND |
| 2015-04-27 | 357754 | ND |
| 2015-04-27 | 357753 | ND |
| 2015-04-27 | 357751 | ND |
| 2015-04-27 | 357752 | ND |
| 2015-07-21 | 375792 | ND |
| 2015-07-21 | 375797 | ND |
| 2015-07-21 | 375796 | ND |
| 2015-07-21 | 375795 | ND |
| 2015-07-21 | 375794 | ND |
| 2015-07-21 | 375793 | ND |
| 2015-07-21 | 375791 | ND |
| 2018-09-10 | 560685 | ND |
| 2018-12-03 | 577973 | ND |
| 2018-12-03 | 577974 | ND |
| 2019-04-15 | 604865 | ND |
| 2019-04-24 | 605778 | ND |
| 2019-09-17 | 621688 | ND |