2,4,5-TP (Silvex)
Paw Glen Alsace Div
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 | 4 | 0 | ND |
| 2020 | ND | 24 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 24 | 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 |
|---|---|---|
| 2019-07-22 | 45717501 | ND |
| 2019-07-22 | 45717601 | ND |
| 2019-07-22 | 45717401 | ND |
| 2019-07-29 | 46133302 | ND |
| 2020-05-04 | 22262943.00 | ND |
| 2020-05-04 | 22262914.00 | ND |
| 2020-05-06 | 22263082.00 | ND |
| 2020-05-11 | 22263001.00 | ND |
| 2020-05-11 | 22262972.00 | ND |
| 2020-05-11 | 22262827.00 | ND |
| 2020-05-13 | 22263053.00 | ND |
| 2020-05-13 | 22262885.00 | ND |
| 2020-05-13 | 22262856.00 | ND |
| 2020-05-18 | 22263395.00 | ND |
| 2020-05-19 | 22263453.00 | ND |
| 2020-05-19 | 22263424.00 | ND |
| 2020-08-04 | 22845365.00 | ND |
| 2020-08-04 | 22845394.00 | ND |
| 2020-08-06 | 22845336.00 | ND |
| 2020-08-06 | 22845515.00 | ND |
| 2020-08-11 | 22845486.00 | ND |
| 2020-08-11 | 22845428.00 | ND |
| 2020-08-11 | 22845457.00 | ND |
| 2020-08-12 | 22845307.00 | ND |
| 2020-08-12 | 22845923.00 | ND |
| 2020-08-12 | 22845894.00 | ND |
| 2020-08-13 | 22845981.00 | ND |
| 2020-08-18 | 22845952.00 | ND |
| 2023-05-04 | 28950142.00 | ND |
| 2023-05-04 | 28950171.00 | ND |
| 2023-05-04 | 28950113.00 | ND |
| 2023-05-04 | 28950084.00 | ND |
| 2023-05-04 | 28950055.00 | ND |
| 2023-05-11 | 28950232.00 | ND |
| 2023-05-11 | 28949997.00 | ND |
| 2023-05-11 | 28950203.00 | ND |
| 2023-05-11 | 28950290.00 | ND |
| 2023-05-11 | 28950261.00 | ND |
| 2023-05-11 | 28950026.00 | ND |
| 2023-05-11 | 28949968.00 | ND |
| 2023-08-03 | 29546864.00 | ND |
| 2023-08-03 | 29546811.00 | ND |
| 2023-08-03 | 29546888.00 | ND |
| 2023-08-03 | 29546898.00 | ND |
| 2023-08-03 | 29546782.00 | ND |
| 2023-08-09 | 29546753.00 | ND |
| 2023-08-09 | 29547002.00 | ND |
| 2023-08-09 | 29546724.00 | ND |
| 2023-08-09 | 29546695.00 | ND |
| 2023-08-10 | 29546959.00 | ND |
| 2023-08-10 | 29546930.00 | ND |
| 2023-08-10 | 29546666.00 | ND |