2,4,5-TP (Silvex)
City of Robinson
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.
12
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 | N/A | 0 | 0 | N/A |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 5 | 0 | ND |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 1 | 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 |
|---|---|---|
| 2014-02-10 | AC41794 | ND |
| 2014-02-10 | AC41795 | ND |
| 2014-02-10 | AC41796 | ND |
| 2014-08-13 | AC63483 | ND |
| 2014-08-13 | AC63486 | ND |
| 2016-01-19 | AD18716 | ND |
| 2017-01-11 | AD64467 | ND |
| 2017-01-11 | AD64466 | ND |
| 2017-01-11 | AD64475 | ND |
| 2017-01-11 | AD64477 | ND |
| 2017-10-16 | AE00902 | ND |
| 2019-03-20 | AE59312 | ND |