2,4,5-TP (Silvex)
West Baton Rouge Water Works District 2
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 | N/A | 0 | 0 | N/A |
| 2019 | ND | 10 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 1 | 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 |
|---|---|---|
| 2019-06-18 | 35476846005 | ND |
| 2019-06-18 | 35476846005 | ND |
| 2019-08-12 | 35489897001 | ND |
| 2019-08-12 | 35489897001 | ND |
| 2019-10-04 | 35503323001 | ND |
| 2019-10-04 | 35503323001 | ND |
| 2019-10-08 | 35504152001 | ND |
| 2019-10-08 | 35504152001 | ND |
| 2019-11-05 | 35510882001 | ND |
| 2019-11-05 | 35510882001 | ND |
| 2020-01-15 | 35524566004 | ND |
| 2020-11-10 | 35591333001 | ND |
| 2021-02-04 | 35609851001 | ND |
| 2021-05-18 | 35634927001 | ND |
| 2021-05-18 | B2102270-001 | ND |
| 2021-09-20 | 35665075002 | ND |
| 2022-06-21 | 35727308001 | ND |
| 2022-10-17 | 35754574001 | ND |
| 2023-01-10 | 35772224001 | ND |