2,4,5-TP (Silvex)
Jordan Valley Water Conservancy District
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.
34
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 | 5 | 0 | ND |
| 2015 | ND | 5 | 0 | ND |
| 2016 | ND | 5 | 0 | ND |
| 2017 | ND | 11 | 0 | ND |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 5 | 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 | Result |
|---|---|
| 2014-01-02 | ND |
| 2014-06-03 | ND |
| 2014-06-04 | ND |
| 2014-06-04 | ND |
| 2014-07-15 | ND |
| 2015-01-13 | ND |
| 2015-02-11 | ND |
| 2015-02-26 | ND |
| 2015-07-07 | ND |
| 2015-07-21 | ND |
| 2016-01-06 | ND |
| 2016-02-16 | ND |
| 2016-04-05 | ND |
| 2016-04-25 | ND |
| 2016-07-18 | ND |
| 2017-01-03 | ND |
| 2017-01-03 | ND |
| 2017-01-04 | ND |
| 2017-01-04 | ND |
| 2017-01-23 | ND |
| 2017-05-03 | ND |
| 2017-06-07 | ND |
| 2017-06-08 | ND |
| 2017-07-10 | ND |
| 2017-07-12 | ND |
| 2017-08-14 | ND |
| 2018-01-25 | ND |
| 2018-05-08 | ND |
| 2018-12-20 | ND |
| 2019-01-07 | ND |
| 2019-04-24 | ND |
| 2019-07-09 | ND |
| 2019-07-16 | ND |
| 2019-07-22 | ND |