2,4,5-TP (Silvex)
Saint Louis Park
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 | 1 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | ND | 8 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 6 | 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 |
|---|---|---|
| 2018-04-10 | 18D0389-01 | ND |
| 2020-01-22 | 20A0832-01 | ND |
| 2020-05-21 | 20E1400-01 | ND |
| 2020-05-21 | 20E1400-02 | ND |
| 2020-05-21 | 20E1401-02 | ND |
| 2020-06-25 | 20F2056-01 | ND |
| 2020-08-05 | 20H0263-03 | ND |
| 2020-08-05 | 20H0263-02 | ND |
| 2020-08-05 | 20H0263-01 | ND |
| 2021-11-30 | 21L0010-01 | ND |
| 2022-02-08 | 22B0528-01 | ND |
| 2023-06-08 | 23F0898-01 | ND |
| 2023-06-08 | 23F0898-03 | ND |
| 2023-07-19 | 23G1149-01 | ND |
| 2023-07-19 | 23G1149-02 | ND |
| 2023-07-19 | 23G1149-03 | ND |
| 2023-10-30 | 23J1664-03 | ND |