2,4,5-TP (Silvex)
Elizabethtown Area Water
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 | 1 | 0 | ND |
| 2020 | ND | 12 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 13 | 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 |
|---|---|---|
| 2019-06-10 | 9045802-01 | ND |
| 2020-05-26 | 22567392.00 | ND |
| 2020-05-26 | 22567512.00 | ND |
| 2020-05-26 | 22567482.00 | ND |
| 2020-05-26 | 22567452.00 | ND |
| 2020-05-26 | 22567422.00 | ND |
| 2020-05-26 | 22567542.00 | ND |
| 2020-08-03 | 22957747.00 | ND |
| 2020-08-03 | 22957657.00 | ND |
| 2020-08-03 | 22957627.00 | ND |
| 2020-08-03 | 22957777.00 | ND |
| 2020-08-03 | 22957717.00 | ND |
| 2020-08-03 | 22957687.00 | ND |
| 2023-04-24 | 29061767.00 | ND |
| 2023-04-24 | 29061765.00 | ND |
| 2023-04-24 | 29061766.00 | ND |
| 2023-04-24 | 29061770.00 | ND |
| 2023-04-24 | 29061771.00 | ND |
| 2023-04-24 | 29061769.00 | ND |
| 2023-04-24 | 29061768.00 | ND |
| 2023-08-28 | 29849240.00 | ND |
| 2023-08-28 | 29849239.00 | ND |
| 2023-08-28 | 29849241.00 | ND |
| 2023-08-28 | 29849238.00 | ND |
| 2023-08-28 | 29849237.00 | ND |
| 2023-08-28 | 29849236.00 | ND |