2,4,5-TP (Silvex)
Plumstead Township Summer Hill Mead
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 | 3 | 0 | ND |
| 2020 | ND | 5 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 3 | 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 |
|---|---|---|
| 2019-06-27 | 9021151-01 | ND |
| 2019-08-16 | 9027730-01 | ND |
| 2019-10-11 | 9034974-01 | ND |
| 2020-02-24 | 21655497.00 | ND |
| 2020-05-08 | 22402546.00 | ND |
| 2020-05-08 | 22402517.00 | ND |
| 2020-07-31 | 22785769.00 | ND |
| 2020-10-09 | 23170752.00 | ND |
| 2021-01-15 | 23700404.00 | ND |
| 2021-05-27 | 24626341.00 | ND |
| 2021-07-16 | 24816606.00 | ND |
| 2021-10-13 | 25392706.00 | ND |
| 2022-01-14 | 26106531.00 | ND |
| 2023-04-27 | 28886862.00 | ND |
| 2023-04-27 | 28886891.00 | ND |
| 2023-05-12 | 29096419.00 | ND |