2,4,5-TP (Silvex)
Tensas Water District Association
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.
20
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 |
|---|---|---|---|---|
| 2014 | ND | 2 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
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 |
|---|---|---|
| 2014-03-17 | AD89856 | ND |
| 2014-03-17 | AD89856 | ND |
| 2015-03-03 | 35177844004 | ND |
| 2015-03-03 | 35177844004 | ND |
| 2015-09-16 | 35207972015 | ND |
| 2015-09-16 | 35207972015 | ND |
| 2016-01-11 | 35224622005 | ND |
| 2016-01-11 | 35224622005 | ND |
| 2016-09-07 | 35264598002 | ND |
| 2016-09-07 | 35264598002 | ND |
| 2017-09-25 | 35338816007 | ND |
| 2017-09-25 | 35338816007 | ND |
| 2018-01-08 | 35367824002 | ND |
| 2018-01-08 | 35367824002 | ND |
| 2018-07-30 | 35407878001 | ND |
| 2018-07-30 | 35407878001 | ND |
| 2019-01-14 | 35442603003 | ND |
| 2019-01-14 | 35442603003 | ND |
| 2019-07-31 | 35486747001 | ND |
| 2019-07-31 | 35486747001 | ND |