2,4,5-TP (Silvex)
Warrior River Water Authority
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.
16
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 2 | 0 | ND |
| 2015 | ND | 6 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 6 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
ppb = parts per billion
State and national drinking water standards and health guidelines
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 |
|---|---|---|
| 2014-06-26 | 140626017-1 | ND |
| 2014-09-19 | 140919009-1 | ND |
| 2015-09-18 | 150918030-1 | ND |
| 2015-09-18 | 150918030-2 | ND |
| 2015-09-18 | 150918030-3 | ND |
| 2015-11-23 | 151123009-1 | ND |
| 2015-11-23 | 151123009-2 | ND |
| 2015-11-23 | 151123009-3 | ND |
| 2017-06-02 | 170602040-1 | ND |
| 2017-09-19 | 170919018-1 | ND |
| 2018-02-26 | 180226023-3 | ND |
| 2018-02-26 | 180226023-2 | ND |
| 2018-02-26 | 180226023-1 | ND |
| 2018-07-31 | 180731029-002 | ND |
| 2018-07-31 | 180731029-001 | ND |
| 2018-10-15 | 18100468-001C | ND |