2,4,5-TP (Silvex)
Telford Borough 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 | 19 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 10 | 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 |
|---|---|---|
| 2020-03-03 | 21850268.00 | ND |
| 2020-03-03 | 21850209.00 | ND |
| 2020-03-03 | 21850239.00 | ND |
| 2020-03-03 | 21850179.00 | ND |
| 2020-06-01 | 22419244.00 | ND |
| 2020-06-01 | 22419364.00 | ND |
| 2020-06-01 | 22419280.00 | ND |
| 2020-06-01 | 22419334.00 | ND |
| 2020-06-01 | 22419304.00 | ND |
| 2020-08-24 | 23002185.00 | ND |
| 2020-08-24 | 23002304.00 | ND |
| 2020-08-24 | 23002215.00 | ND |
| 2020-08-24 | 23002245.00 | ND |
| 2020-09-14 | 23002275.00 | ND |
| 2020-10-12 | 23185480.00 | ND |
| 2020-10-12 | 23185420.00 | ND |
| 2020-10-12 | 23185450.00 | ND |
| 2020-10-12 | 23185390.00 | ND |
| 2020-12-01 | 23540110.00 | ND |
| 2021-01-13 | 23715300.00 | ND |
| 2023-05-03 | 28902894.00 | ND |
| 2023-05-03 | 28902893.00 | ND |
| 2023-05-03 | 28902895.00 | ND |
| 2023-05-03 | 28902892.00 | ND |
| 2023-05-03 | 28902891.00 | ND |
| 2023-08-02 | 29500108.00 | ND |
| 2023-08-02 | 29500106.00 | ND |
| 2023-08-02 | 29500110.00 | ND |
| 2023-08-02 | 29500107.00 | ND |
| 2023-08-02 | 29500109.00 | ND |