2,4,5-TP (Silvex)
Beauregard Water Works District #3
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 | 22 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 11 | 0 | ND |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 11 | 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 |
|---|---|---|
| 2018-02-27 | 35377534001 | ND |
| 2018-02-27 | 35377534001 | ND |
| 2018-03-19 | 35381349005 | ND |
| 2018-03-19 | 35381349004 | ND |
| 2018-03-19 | 35381349001 | ND |
| 2018-03-19 | 35381349002 | ND |
| 2018-03-19 | 35381349003 | ND |
| 2018-03-19 | 35381349004 | ND |
| 2018-03-19 | 35381349005 | ND |
| 2018-03-19 | 35381349003 | ND |
| 2018-03-19 | 35381349002 | ND |
| 2018-03-19 | 35381349001 | ND |
| 2018-04-16 | 35387317002 | ND |
| 2018-04-16 | 35387317001 | ND |
| 2018-04-16 | 35387317005 | ND |
| 2018-04-16 | 35387317003 | ND |
| 2018-04-16 | 35387317002 | ND |
| 2018-04-16 | 35387317001 | ND |
| 2018-04-16 | 35387317005 | ND |
| 2018-04-16 | 35387317004 | ND |
| 2018-04-16 | 35387317003 | ND |
| 2018-04-16 | 35387317004 | ND |
| 2021-02-02 | 35609370003 | ND |
| 2021-02-02 | 35609370002 | ND |
| 2021-02-02 | 35609370001 | ND |
| 2021-02-02 | 35609370004 | ND |
| 2021-03-16 | 35619951002 | ND |
| 2021-03-16 | 35619951003 | ND |
| 2021-03-16 | 35619951004 | ND |
| 2021-03-16 | 35619951005 | ND |
| 2021-03-16 | 35619951001 | ND |
| 2021-04-27 | 35629422001 | ND |
| 2021-04-27 | 35629422002 | ND |
| 2023-07-24 | 35815844001 | ND |
| 2023-07-24 | 35815844002 | ND |
| 2023-07-24 | 35815844003 | ND |
| 2023-07-24 | 35815844004 | ND |
| 2023-07-24 | 35815844005 | ND |
| 2023-08-07 | 35819580001 | ND |
| 2023-08-07 | 35819580002 | ND |
| 2023-08-07 | 35819580003 | ND |
| 2023-08-07 | 35819580004 | ND |
| 2023-08-07 | 35819580005 | ND |
| 2023-08-07 | 35819580006 | ND |