2,4,5-TP (Silvex)
Frankfort
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.
15
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 |
|---|---|---|---|---|
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 1 | 0 | ND |
| 2018 | ND | 8 | 0 | ND |
| 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 |
|---|---|---|
| 2015-08-18 | 1508E42-001C | ND |
| 2015-11-17 | 1511D02-001C | ND |
| 2016-02-16 | 1602A55-001C | ND |
| 2016-04-18 | 1604D34-001C | ND |
| 2016-08-16 | 1608E42-001C | ND |
| 2016-10-17 | 1610D06-001C | ND |
| 2017-01-17 | 1701903-001C | ND |
| 2018-02-05 | 1802380-001C | ND |
| 2018-05-23 | 1805I66-001C | ND |
| 2018-07-16 | 1807B08-001C | ND |
| 2018-07-31 | 18H0064-01_02 | ND |
| 2018-07-31 | 18H0064-02_02 | ND |
| 2018-08-13 | 1808C21-001C | ND |
| 2018-08-13 | 1808C21-002C | ND |
| 2018-11-29 | 1811J64-001C | ND |