2,4,5-TP (Silvex)
Waldorf
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.
23
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 | 1 | 0 | ND |
| 2015 | ND | 3 | 0 | ND |
| 2016 | ND | 7 | 0 | ND |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 11 | 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 |
|---|---|---|
| 2014-07-25 | 0080049_01_00036 | ND |
| 2015-08-19 | E16000688001 | ND |
| 2015-10-15 | E16001663001 | ND |
| 2015-10-15 | E16001663003 | ND |
| 2016-05-24 | E16004452002 | ND |
| 2016-05-24 | E16004457001 | ND |
| 2016-08-10 | E17000579002 | ND |
| 2016-10-24 | E17001823003 | ND |
| 2016-10-24 | E17001824003 | ND |
| 2016-10-24 | E17001824004 | ND |
| 2016-10-24 | E17001824001 | ND |
| 2018-07-17 | E19000163001 | ND |
| 2019-03-26 | E19003139001 | ND |
| 2019-03-26 | E19003126001 | ND |
| 2019-04-04 | 3026085001_A | ND |
| 2019-04-19 | E19003517001 | ND |
| 2019-06-13 | E19004315005 | ND |
| 2019-06-27 | E19004508001 | ND |
| 2019-06-27 | E19004507001 | ND |
| 2019-06-27 | E19004506001 | ND |
| 2019-07-10 | E20000115002 | ND |
| 2019-07-10 | E20000119001 | ND |
| 2019-09-27 | E20001252001 | ND |