2,4,5-TP (Silvex)
South Saint Paul
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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | ND | 5 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 4 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
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 |
|---|---|---|
| 2018-01-03 | 18A0012-01 | ND |
| 2018-05-10 | 18E0851-02 | ND |
| 2018-05-10 | 18E0851-03 | ND |
| 2018-08-24 | 18H2147-01 | ND |
| 2018-10-18 | 18J0909-01 | ND |
| 2019-01-14 | 19A0377-01 | ND |
| 2021-08-13 | 21H1222-02 | ND |
| 2021-10-14 | 21J0693-02 | ND |
| 2022-03-09 | 22C0418-01 | ND |
| 2022-05-18 | 22E1432-01 | ND |
| 2023-07-25 | 23G1650-01 | ND |
| 2023-10-30 | 23J1666-02 | ND |
| 2023-10-30 | 23J1666-03 | ND |
| 2023-10-30 | 23J1666-05 | ND |