2,4,5-TP (Silvex)
City of Glendale
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.
46
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 | 23 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | ND | 22 | 0 | ND |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
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 |
|---|---|---|
| 2014-01-02 | 201401020046S | ND |
| 2014-01-06 | 201401060078S | ND |
| 2014-01-06 | 201401060076S | ND |
| 2014-01-16 | 201401170198S | ND |
| 2014-01-16 | 201401160469S | ND |
| 2014-05-15 | 201405160163S | ND |
| 2014-05-15 | 201405160160S | ND |
| 2014-05-21 | 201405210820S | ND |
| 2014-05-21 | 201405210819S | ND |
| 2014-05-21 | 201405210817S | ND |
| 2014-05-27 | 201405270261S | ND |
| 2014-07-10 | 201407100564S | ND |
| 2014-07-10 | 201407100560S | ND |
| 2014-07-10 | 201407100548S | ND |
| 2014-07-14 | 201407140228S | ND |
| 2014-07-14 | 201407140178S | ND |
| 2014-07-18 | 201407180322S | ND |
| 2014-10-06 | 201410060097S | ND |
| 2014-10-07 | 201410080469S | ND |
| 2014-10-14 | 201410140463S | ND |
| 2014-10-15 | 201410150264S | ND |
| 2014-10-15 | 201410150266S | ND |
| 2014-10-15 | 201410150265S | ND |
| 2015-02-19 | 201502190748S | ND |
| 2017-04-03 | 201704030394S | ND |
| 2017-04-03 | 201704030393S | ND |
| 2017-04-03 | 201704030392S | ND |
| 2017-04-19 | 201704190434S | ND |
| 2017-04-19 | 201704190433S | ND |
| 2017-04-19 | 201704190432S | ND |
| 2017-04-19 | 201704190431S | ND |
| 2017-04-26 | 201704260364S | ND |
| 2017-04-26 | 201704260363S | ND |
| 2017-04-27 | 201704270335S | ND |
| 2017-05-16 | 201705160653S | ND |
| 2017-10-09 | 201710090385S | ND |
| 2017-10-09 | 201710090384S | ND |
| 2017-10-09 | 201710090383S | ND |
| 2017-10-09 | 201710090377S | ND |
| 2017-10-10 | 201710100351S | ND |
| 2017-10-10 | 201710100350S | ND |
| 2017-10-10 | 201710100346S | ND |
| 2017-10-11 | 201710110822S | ND |
| 2017-10-11 | 201710110821S | ND |
| 2017-10-11 | 201710110812S | ND |
| 2017-10-12 | 201710120469S | ND |