2,4,5-TP (Silvex)
Ramsey
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 |
|---|---|---|---|---|
| 2014 | ND | 3 | 0 | ND |
| 2015 | ND | 3 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 7 | 0 | ND |
| 2018 | ND | 4 | 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 |
|---|---|---|
| 2014-11-17 | 14K0643-03 | ND |
| 2014-11-17 | 14K0643-04 | ND |
| 2014-11-17 | 14K0642-01 | ND |
| 2015-01-06 | 15A0053-01 | ND |
| 2015-01-06 | 15A0053-02 | ND |
| 2015-01-06 | 15A0054-01 | ND |
| 2016-03-14 | 3414298 | ND |
| 2016-03-14 | 3414091 | ND |
| 2016-03-14 | 3414265 | ND |
| 2016-05-25 | 3457796 | ND |
| 2017-09-19 | 17I0863-01 | ND |
| 2017-09-19 | 17I0863-02 | ND |
| 2017-09-19 | 17I0863-03 | ND |
| 2017-09-19 | 17I0863-04 | ND |
| 2017-11-22 | 17K0920-01 | ND |
| 2017-11-22 | 17K0920-03 | ND |
| 2017-11-22 | 17K0920-02 | ND |
| 2018-02-21 | 18B1033-01 | ND |
| 2018-06-18 | 18F1206-01 | ND |
| 2018-07-31 | 18G2048-02 | ND |
| 2018-12-03 | 18L0050-01 | ND |