2,4,5-TP (Silvex)
City of River Oaks
NOTE: City of River Oaks purchases water from City of Fort Worth which is required to test for 2,4,5-tp (silvex). Sample information shown below was taken by City of Fort Worth.
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 | 1 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 4 | 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: City of River Oaks purchases water from City of Fort Worth which is required to test for 2,4,5-tp (silvex). Sample information shown below was taken by City of Fort Worth.
| Date | Lab ID | Result |
|---|---|---|
| 2018-01-24 | Q1802705015 | ND |
| 2019-01-23 | Q1903345006 | ND |
| 2019-04-24 | Q1916570002 | ND |
| 2019-05-22 | Q1927658007 | ND |
| 2019-05-22 | Q1927658014 | ND |
| 2019-06-17 | Q1936867006 | ND |
| 2019-07-24 | Q1947967026 | ND |
| 2019-10-23 | Q1973436021 | ND |
| 2020-01-22 | Q2002459005 | ND |
| 2020-01-22 | Q2002459031 | ND |
| 2021-01-20 | Q2101402004 | ND |
| 2022-01-19 | Q2201985012 | ND |
| 2022-05-19 | Q2214821010 | ND |
| 2022-05-19 | Q2214821011 | ND |
| 2022-07-20 | Q2220779011 | ND |
| 2023-01-04 | Q2300420008 | ND |
| 2023-03-21 | Q2310673015 | ND |