2,4,5-TP (Silvex)
Portage
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.
46
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 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 30 | 0 | ND |
| 2019 | ND | 16 | 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 |
|---|---|---|
| 2018-05-22 | LLH81757 | ND |
| 2018-05-22 | LLH81761 | ND |
| 2018-05-22 | LLH81757 | ND |
| 2018-05-22 | LLH81756 | ND |
| 2018-05-22 | LLH81756 | ND |
| 2018-05-22 | LLH81758 | ND |
| 2018-05-22 | LLH81758 | ND |
| 2018-05-22 | LLH81759 | ND |
| 2018-05-22 | LLH81760 | ND |
| 2018-05-22 | LLH81761 | ND |
| 2018-05-22 | LLH81762 | ND |
| 2018-05-22 | LLH81762 | ND |
| 2018-05-22 | LLH81760 | ND |
| 2018-05-22 | LLH81759 | ND |
| 2018-06-25 | LLH88663 | ND |
| 2018-06-25 | LLH88663 | ND |
| 2018-06-25 | LLH88664 | ND |
| 2018-06-25 | LLH88664 | ND |
| 2018-08-22 | LLI00614 | ND |
| 2018-08-22 | LLI00614 | ND |
| 2018-09-20 | LLI06939 | ND |
| 2018-09-20 | LLI06939 | ND |
| 2018-09-26 | LLI08300 | ND |
| 2018-09-26 | LLI08299 | ND |
| 2018-09-26 | LLI08299 | ND |
| 2018-09-26 | LLI08300 | ND |
| 2018-12-13 | LLI19333 | ND |
| 2018-12-13 | LLI19333 | ND |
| 2018-12-13 | LLI19334 | ND |
| 2018-12-13 | LLI19334 | ND |
| 2019-01-23 | LLI23205 | ND |
| 2019-01-23 | LLI23205 | ND |
| 2019-01-23 | LLI23204 | ND |
| 2019-01-23 | LLI23204 | ND |
| 2019-05-23 | LLI39384 | ND |
| 2019-05-23 | LLI39384 | ND |
| 2019-05-23 | LLI39385 | ND |
| 2019-05-23 | LLI39385 | ND |
| 2019-08-15 | LLI56724 | ND |
| 2019-08-15 | LLI56724 | ND |
| 2019-08-15 | LLI56723 | ND |
| 2019-08-15 | LLI56723 | ND |
| 2019-11-14 | LLI77203 | ND |
| 2019-11-14 | LLI77203 | ND |
| 2019-11-14 | LLI77202 | ND |
| 2019-11-14 | LLI77202 | ND |