2,4,5-TP (Silvex)
Gettysburg Municipal Authority
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 | N/A | 0 | 0 | N/A |
| 2020 | ND | 15 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 14 | 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 |
|---|---|---|
| 2020-05-12 | 22350021.00 | ND |
| 2020-05-12 | 22349988.00 | ND |
| 2020-05-12 | 22349934.00 | ND |
| 2020-05-18 | 22350053.00 | ND |
| 2020-05-18 | 22349966.00 | ND |
| 2020-05-20 | 22349883.00 | ND |
| 2020-05-20 | 22349912.00 | ND |
| 2020-08-18 | 22937378.00 | ND |
| 2020-08-18 | 22937320.00 | ND |
| 2020-08-19 | 22937349.00 | ND |
| 2020-08-19 | 22937407.00 | ND |
| 2020-08-24 | 23125309.00 | ND |
| 2020-08-24 | 23125280.00 | ND |
| 2020-08-24 | 23125338.00 | ND |
| 2020-12-02 | 23656083.00 | ND |
| 2023-05-16 | 29242405.00 | ND |
| 2023-05-16 | 29242345.00 | ND |
| 2023-05-16 | 29242377.00 | ND |
| 2023-05-17 | 29242788.00 | ND |
| 2023-05-17 | 29242760.00 | ND |
| 2023-05-17 | 29242732.00 | ND |
| 2023-05-30 | 29242704.00 | ND |
| 2023-08-01 | 29639315.00 | ND |
| 2023-08-01 | 29639268.00 | ND |
| 2023-08-15 | 29639287.00 | ND |
| 2023-08-16 | 29829444.00 | ND |
| 2023-08-16 | 29829423.00 | ND |
| 2023-08-22 | 29829509.00 | ND |
| 2023-08-22 | 29829481.00 | ND |