2,4,5-TP (Silvex)
Tuttle
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 | ND | 6 | 0 | ND |
| 2019 | ND | 6 | 0 | ND |
| 2020 | ND | 6 | 0 | ND |
| 2021 | ND | 6 | 0 | ND |
| 2022 | ND | 6 | 0 | ND |
| 2023 | ND | 6 | 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 |
|---|---|---|
| 2018-09-19 | AI19124-01 | ND |
| 2018-09-19 | AI19124-02 | ND |
| 2018-09-19 | AI19124-03 | ND |
| 2018-10-10 | AJ10083-02 | ND |
| 2018-10-10 | AJ10083-03 | ND |
| 2018-10-10 | AJ10083-01 | ND |
| 2019-01-15 | BA15053-03 | ND |
| 2019-01-15 | BA15053-02 | ND |
| 2019-01-15 | BA15053-01 | ND |
| 2019-04-08 | BD09046-02 | ND |
| 2019-04-09 | BD09046-03 | ND |
| 2019-04-09 | BD09046-01 | ND |
| 2020-08-18 | CH18072-01 | ND |
| 2020-08-18 | CH18072-02 | ND |
| 2020-08-18 | CH18072-03 | ND |
| 2020-10-06 | CJ06114-01 | ND |
| 2020-10-06 | CJ06114-02 | ND |
| 2020-10-06 | CJ06114-03 | ND |
| 2021-05-11 | DE11104-03 | ND |
| 2021-05-11 | DE11104-02 | ND |
| 2021-05-11 | DE11104-01 | ND |
| 2021-08-10 | DH10148-01 | ND |
| 2021-08-10 | DH10148-03 | ND |
| 2021-08-10 | DH10148-02 | ND |
| 2022-04-12 | ED12066-01 | ND |
| 2022-04-12 | ED12066-02 | ND |
| 2022-04-12 | ED12066-03 | ND |
| 2022-12-06 | EL06130-01 | ND |
| 2022-12-06 | EL06130-02 | ND |
| 2022-12-06 | EL06130-03 | ND |
| 2023-02-14 | FB14050-01 | ND |
| 2023-02-14 | FB14050-02 | ND |
| 2023-02-14 | FB14050-03 | ND |
| 2023-06-21 | FF21082-01 | ND |
| 2023-06-21 | FF21082-02 | ND |
| 2023-06-21 | FF21082-03 | ND |