2,4,5-TP (Silvex)
Markridge Park Subdivision Water System
NOTE: Markridge Park Subdivision Water System purchases water from City of Carencro Water System which is required to test for 2,4,5-tp (silvex). Sample information shown below was taken by City of Carencro Water System.
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 | 4 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 6 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 2 | 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
NOTE: Markridge Park Subdivision Water System purchases water from City of Carencro Water System which is required to test for 2,4,5-tp (silvex). Sample information shown below was taken by City of Carencro Water System.
| Date | Lab ID | Result |
|---|---|---|
| 2019-02-18 | 35449820002 | ND |
| 2019-02-18 | 35449820001 | ND |
| 2019-02-18 | 35449820002 | ND |
| 2019-02-18 | 35449820001 | ND |
| 2020-04-13 | 35543759004 | ND |
| 2020-04-13 | 35543759003 | ND |
| 2020-04-13 | 35543759002 | ND |
| 2020-04-13 | 35543759001 | ND |
| 2020-12-07 | 35597474002 | ND |
| 2020-12-07 | 35597474001 | ND |
| 2021-08-03 | 35653200001 | ND |
| 2021-08-03 | 35653200002 | ND |
| 2021-11-16 | 35678714004 | ND |
| 2021-11-16 | 35678714005 | ND |
| 2022-03-21 | 35705902004 | ND |
| 2022-03-21 | 35705902005 | ND |
| 2023-03-13 | 35786267001 | ND |
| 2023-03-13 | 35786267002 | ND |