2,4,5-TP (Silvex)
Windermere Community
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.
18
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 | 5 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 7 | 0 | ND |
| 2018 | ND | 3 | 0 | ND |
| 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 |
|---|---|---|
| 2014-03-12 | AC46572 | ND |
| 2014-03-12 | AC46807 | ND |
| 2014-06-24 | AC57837 | ND |
| 2014-06-24 | AC57839 | ND |
| 2014-08-27 | AC65290 | ND |
| 2015-08-05 | AD02738 | ND |
| 2016-04-27 | AD34504 | ND |
| 2017-03-13 | AD74718 | ND |
| 2017-05-01 | AD81956 | ND |
| 2017-05-01 | AD81958 | ND |
| 2017-09-18 | AD96578 | ND |
| 2017-12-05 | AE06819 | ND |
| 2017-12-05 | AE06820 | ND |
| 2017-12-07 | AE07277 | ND |
| 2018-02-12 | AE13377 | ND |
| 2018-02-12 | AE13375 | ND |
| 2018-04-04 | AE21290 | ND |
| 2019-05-06 | AE65005 | ND |