2,4,5-TP (Silvex)
Bayou La Batre Utilities
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 | ND | 5 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 5 | 0 | ND |
| 2023 | ND | 5 | 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 |
|---|---|---|
| 2018-01-29 | 180129039-2 | ND |
| 2018-01-29 | 180129039-1 | ND |
| 2018-05-07 | 180509028-1 | ND |
| 2018-05-07 | 180509028-2 | ND |
| 2018-06-13 | 180614041-1S | ND |
| 2019-11-21 | 20131445002_ISOC | ND |
| 2020-03-16 | 20146809002_ISOC | ND |
| 2020-03-16 | 20146809002_S515 | ND |
| 2020-04-27 | 20152054001_ISOC | ND |
| 2020-07-14 | 20162712001_ISOC | ND |
| 2020-10-22 | 20176839001_ISOC | ND |
| 2021-02-22 | 20191200001_ISOC | ND |
| 2021-04-27 | 20197805001 | ND |
| 2021-07-22 | 20215372001 | ND |
| 2021-11-18 | 20226391001_ISOC | ND |
| 2022-03-07 | 20236841001_ISOC | ND |
| 2022-03-07 | 20236842001_ISOC | ND |
| 2022-05-25 | 20244818002_ISOC | ND |
| 2022-09-12 | 20255358001_ISOC | ND |
| 2022-10-19 | 20258987001_ISOC | ND |
| 2023-02-07 | 20269193001_ISOC | ND |
| 2023-02-15 | 20269913001_ISOC | ND |
| 2023-04-11 | 20274431001_ISOC | ND |
| 2023-07-13 | 20282549001_ISOC | ND |
| 2023-10-17 | 20293432001_ISOC | ND |