2,4,5-TP (Silvex)
East Cocalico Township
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 | 22 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 20 | 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 |
|---|---|---|
| 2020-05-01 | 22369348.00 | ND |
| 2020-05-01 | 22369500.00 | ND |
| 2020-05-01 | 22369471.00 | ND |
| 2020-05-01 | 22369435.00 | ND |
| 2020-05-01 | 22369406.00 | ND |
| 2020-05-01 | 22369377.00 | ND |
| 2020-05-01 | 22369319.00 | ND |
| 2020-05-01 | 22369290.00 | ND |
| 2020-05-01 | 22369261.00 | ND |
| 2020-05-01 | 22369232.00 | ND |
| 2020-05-01 | 22369203.00 | ND |
| 2020-07-31 | 22956400.00 | ND |
| 2020-07-31 | 22956348.00 | ND |
| 2020-07-31 | 22956197.00 | ND |
| 2020-07-31 | 22956313.00 | ND |
| 2020-07-31 | 22956371.00 | ND |
| 2020-07-31 | 22956284.00 | ND |
| 2020-07-31 | 22956168.00 | ND |
| 2020-07-31 | 22956255.00 | ND |
| 2020-07-31 | 22956139.00 | ND |
| 2020-07-31 | 22956232.00 | ND |
| 2020-07-31 | 22956430.00 | ND |
| 2023-05-30 | 29261722.00 | ND |
| 2023-05-30 | 29261719.00 | ND |
| 2023-05-30 | 29261720.00 | ND |
| 2023-05-30 | 29261718.00 | ND |
| 2023-05-30 | 29261721.00 | ND |
| 2023-05-30 | 29261717.00 | ND |
| 2023-05-30 | 29261716.00 | ND |
| 2023-05-30 | 29261715.00 | ND |
| 2023-05-30 | 29261723.00 | ND |
| 2023-06-28 | 29261797.00 | ND |
| 2023-09-13 | 29847476.00 | ND |
| 2023-09-13 | 29847471.00 | ND |
| 2023-09-13 | 29847477.00 | ND |
| 2023-09-13 | 29847475.00 | ND |
| 2023-09-13 | 29847470.00 | ND |
| 2023-09-13 | 29847478.00 | ND |
| 2023-09-13 | 29847474.00 | ND |
| 2023-09-13 | 29847479.00 | ND |
| 2023-09-13 | 29847473.00 | ND |
| 2023-09-13 | 29847472.00 | ND |